./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/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_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/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_6a8caeda-6215-452b-aa79-74ef905c3c30/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 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:37:15,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:37:15,588 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:37:15,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:37:15,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:37:15,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:37:15,635 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:37:15,636 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:37:15,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:37:15,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:37:15,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:37:15,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:37:15,646 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:37:15,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:37:15,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:37:15,650 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:37:15,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:37:15,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:37:15,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:37:15,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:37:15,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:37:15,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:37:15,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:37:15,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:37:15,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:37:15,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:37:15,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:37:15,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:37:15,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:15,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:37:15,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:37:15,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:37:15,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:37:15,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:37:15,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:37:15,661 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:37:15,661 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:37:15,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:37:15,662 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:37:15,662 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_6a8caeda-6215-452b-aa79-74ef905c3c30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 [2023-11-06 22:37:16,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:37:16,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:37:16,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:37:16,038 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:37:16,039 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:37:16,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-11-06 22:37:19,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:37:19,421 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:37:19,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-11-06 22:37:19,430 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/data/c5c244a38/e55a00de9b764692ab4541ee1c76bcdf/FLAGea7c1d9d4 [2023-11-06 22:37:19,446 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/data/c5c244a38/e55a00de9b764692ab4541ee1c76bcdf [2023-11-06 22:37:19,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:37:19,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:37:19,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:19,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:37:19,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:37:19,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a292f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19, skipping insertion in model container [2023-11-06 22:37:19,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,497 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:37:19,645 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_6a8caeda-6215-452b-aa79-74ef905c3c30/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2023-11-06 22:37:19,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:19,677 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:37:19,690 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_6a8caeda-6215-452b-aa79-74ef905c3c30/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2023-11-06 22:37:19,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:37:19,716 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:37:19,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19 WrapperNode [2023-11-06 22:37:19,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:37:19,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:19,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:37:19,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:37:19,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,755 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2023-11-06 22:37:19,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:37:19,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:37:19,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:37:19,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:37:19,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:37:19,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:37:19,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:37:19,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:37:19,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (1/1) ... [2023-11-06 22:37:19,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:37:19,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:19,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:37:19,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:37:19,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:37:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:37:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:37:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:37:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:37:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:37:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:37:19,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:37:19,935 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:37:19,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:37:20,170 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:37:20,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:37:20,177 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:37:20,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:20 BoogieIcfgContainer [2023-11-06 22:37:20,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:37:20,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:37:20,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:37:20,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:37:20,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:19" (1/3) ... [2023-11-06 22:37:20,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d6317d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:20, skipping insertion in model container [2023-11-06 22:37:20,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:19" (2/3) ... [2023-11-06 22:37:20,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d6317d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:20, skipping insertion in model container [2023-11-06 22:37:20,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:20" (3/3) ... [2023-11-06 22:37:20,190 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2023-11-06 22:37:20,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:37:20,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:37:20,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:37:20,270 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;@439b1a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:37:20,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:37:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:37:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:37:20,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:20,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:20,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:20,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2023-11-06 22:37:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650021846] [2023-11-06 22:37:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650021846] [2023-11-06 22:37:20,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:37:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681632356] [2023-11-06 22:37:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:20,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:20,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:37:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:20,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:37:20,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:20,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681632356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:20,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:37:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665740403] [2023-11-06 22:37:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:20,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:37:20,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:37:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:37:20,727 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:37:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:20,757 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2023-11-06 22:37:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:37:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:37:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:20,768 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:37:20,768 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 22:37:20,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:37:20,782 INFO L413 NwaCegarLoop]: 45 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, 45 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 22:37:20,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 22:37:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 22:37:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:37:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-11-06 22:37:20,855 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2023-11-06 22:37:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:20,855 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-11-06 22:37:20,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:37:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-11-06 22:37:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:37:20,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:20,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:20,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:21,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2023-11-06 22:37:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:21,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110346495] [2023-11-06 22:37:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:21,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20489546] [2023-11-06 22:37:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:21,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:21,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:37:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:21,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:37:21,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:21,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:21,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110346495] [2023-11-06 22:37:21,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20489546] [2023-11-06 22:37:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20489546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:21,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:21,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:37:21,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34655904] [2023-11-06 22:37:21,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:21,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:37:21,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:21,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:37:21,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:37:21,260 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:21,286 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-11-06 22:37:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:37:21,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-06 22:37:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:21,288 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:37:21,288 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:37:21,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 22:37:21,291 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:21,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:37:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:37:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:37:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-06 22:37:21,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-11-06 22:37:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:21,303 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-06 22:37:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-06 22:37:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:37:21,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:21,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:21,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:21,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:21,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2023-11-06 22:37:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:21,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395386447] [2023-11-06 22:37:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:21,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:21,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:21,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148442167] [2023-11-06 22:37:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:21,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:21,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:37:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:21,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:37:21,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:21,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:21,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395386447] [2023-11-06 22:37:21,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:21,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148442167] [2023-11-06 22:37:21,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148442167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:21,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:37:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923211835] [2023-11-06 22:37:21,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:21,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:37:21,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:37:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:21,681 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:21,786 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-06 22:37:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-06 22:37:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:21,789 INFO L225 Difference]: With dead ends: 53 [2023-11-06 22:37:21,790 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 22:37:21,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:37:21,792 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:21,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 137 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 22:37:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-11-06 22:37:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:37:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-11-06 22:37:21,805 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2023-11-06 22:37:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:21,805 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-11-06 22:37:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-11-06 22:37:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 22:37:21,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:21,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:21,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:22,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:22,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2023-11-06 22:37:22,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:22,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170970668] [2023-11-06 22:37:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:22,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:22,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:22,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129811451] [2023-11-06 22:37:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:22,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:22,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:37:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:22,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:37:22,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:22,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:22,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:22,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170970668] [2023-11-06 22:37:22,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:22,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129811451] [2023-11-06 22:37:22,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129811451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:22,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:22,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:37:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039150308] [2023-11-06 22:37:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:22,225 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:22,266 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-11-06 22:37:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:22,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-06 22:37:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:22,272 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:37:22,273 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:37:22,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:22,275 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:22,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:37:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 22:37:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:37:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-06 22:37:22,299 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2023-11-06 22:37:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:22,300 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-06 22:37:22,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-06 22:37:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 22:37:22,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:22,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:22,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:22,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:22,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2023-11-06 22:37:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875135126] [2023-11-06 22:37:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:22,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:22,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360802275] [2023-11-06 22:37:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:22,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:22,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:22,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:37:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:22,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:37:22,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:22,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:22,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875135126] [2023-11-06 22:37:22,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360802275] [2023-11-06 22:37:22,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360802275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:22,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:22,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:37:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427741126] [2023-11-06 22:37:22,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:22,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:37:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:37:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:37:22,929 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:23,094 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-11-06 22:37:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:37:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-06 22:37:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:23,096 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:37:23,097 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 22:37:23,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:37:23,100 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:23,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 175 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 22:37:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-11-06 22:37:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 22:37:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-11-06 22:37:23,131 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2023-11-06 22:37:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:23,131 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-11-06 22:37:23,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-11-06 22:37:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 22:37:23,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:23,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:23,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:23,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:23,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2023-11-06 22:37:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865826780] [2023-11-06 22:37:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:23,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:23,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811729625] [2023-11-06 22:37:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:23,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:23,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:23,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:37:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:23,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:37:23,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:23,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:23,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865826780] [2023-11-06 22:37:23,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811729625] [2023-11-06 22:37:23,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811729625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:23,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:23,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-06 22:37:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213717937] [2023-11-06 22:37:23,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:23,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:37:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:37:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:37:23,615 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:23,846 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2023-11-06 22:37:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:37:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-11-06 22:37:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:23,853 INFO L225 Difference]: With dead ends: 147 [2023-11-06 22:37:23,853 INFO L226 Difference]: Without dead ends: 140 [2023-11-06 22:37:23,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:37:23,855 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:23,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 198 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-06 22:37:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2023-11-06 22:37:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 22:37:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-11-06 22:37:23,912 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2023-11-06 22:37:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:23,912 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-11-06 22:37:23,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-11-06 22:37:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:37:23,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:23,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:23,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:37:24,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:24,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2023-11-06 22:37:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288454116] [2023-11-06 22:37:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:24,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:24,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565025990] [2023-11-06 22:37:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:24,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:24,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:24,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:37:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:24,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:37:24,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:24,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:24,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288454116] [2023-11-06 22:37:24,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565025990] [2023-11-06 22:37:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565025990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:24,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-06 22:37:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488847667] [2023-11-06 22:37:24,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:24,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:37:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:37:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:37:24,442 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:37:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:24,773 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2023-11-06 22:37:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:37:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-06 22:37:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:24,777 INFO L225 Difference]: With dead ends: 183 [2023-11-06 22:37:24,777 INFO L226 Difference]: Without dead ends: 171 [2023-11-06 22:37:24,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:37:24,779 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 114 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:24,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 329 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-06 22:37:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2023-11-06 22:37:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:37:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2023-11-06 22:37:24,821 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2023-11-06 22:37:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:24,822 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2023-11-06 22:37:24,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:37:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2023-11-06 22:37:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:37:24,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:24,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:24,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:25,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:37:25,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:25,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2023-11-06 22:37:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698733994] [2023-11-06 22:37:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:25,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:25,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:25,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695574919] [2023-11-06 22:37:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:25,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:25,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:25,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:25,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:37:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:25,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:37:25,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:25,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:25,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698733994] [2023-11-06 22:37:25,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695574919] [2023-11-06 22:37:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695574919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:25,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:25,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-06 22:37:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239301465] [2023-11-06 22:37:25,483 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:37:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:37:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:37:25,485 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:37:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:25,673 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2023-11-06 22:37:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:37:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-06 22:37:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:25,676 INFO L225 Difference]: With dead ends: 143 [2023-11-06 22:37:25,677 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 22:37:25,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:37:25,678 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:25,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 202 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 22:37:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-11-06 22:37:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-06 22:37:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2023-11-06 22:37:25,711 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2023-11-06 22:37:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:25,711 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2023-11-06 22:37:25,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:37:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2023-11-06 22:37:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:37:25,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:25,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:25,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:25,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:25,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2023-11-06 22:37:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:25,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916335153] [2023-11-06 22:37:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:25,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:25,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860151405] [2023-11-06 22:37:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:25,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:25,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:25,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:25,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:37:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:26,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:37:26,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:37:26,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916335153] [2023-11-06 22:37:26,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860151405] [2023-11-06 22:37:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860151405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:26,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-06 22:37:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896386307] [2023-11-06 22:37:26,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:37:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:37:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:37:26,522 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:26,987 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2023-11-06 22:37:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:37:26,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-06 22:37:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:26,991 INFO L225 Difference]: With dead ends: 183 [2023-11-06 22:37:26,991 INFO L226 Difference]: Without dead ends: 181 [2023-11-06 22:37:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:37:26,993 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 81 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:26,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 454 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:37:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-06 22:37:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2023-11-06 22:37:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-06 22:37:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2023-11-06 22:37:27,040 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2023-11-06 22:37:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:27,040 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2023-11-06 22:37:27,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2023-11-06 22:37:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:37:27,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:27,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:27,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:27,250 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:27,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2023-11-06 22:37:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795331536] [2023-11-06 22:37:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:27,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059321386] [2023-11-06 22:37:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:27,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:27,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:37:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:27,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:37:27,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:27,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:27,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795331536] [2023-11-06 22:37:27,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:27,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059321386] [2023-11-06 22:37:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059321386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:27,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078516451] [2023-11-06 22:37:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:27,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:37:27,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:27,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:37:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:27,421 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:27,480 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2023-11-06 22:37:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-06 22:37:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:27,487 INFO L225 Difference]: With dead ends: 237 [2023-11-06 22:37:27,487 INFO L226 Difference]: Without dead ends: 170 [2023-11-06 22:37:27,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:37:27,492 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:27,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-06 22:37:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-06 22:37:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-06 22:37:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2023-11-06 22:37:27,537 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2023-11-06 22:37:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:27,537 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2023-11-06 22:37:27,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2023-11-06 22:37:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:37:27,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:27,539 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:27,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:37:27,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:27,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2023-11-06 22:37:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280128654] [2023-11-06 22:37:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:27,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:27,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:27,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702343915] [2023-11-06 22:37:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:27,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:27,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:37:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:27,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:37:27,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:37:28,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:37:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280128654] [2023-11-06 22:37:28,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702343915] [2023-11-06 22:37:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702343915] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:28,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-11-06 22:37:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197149641] [2023-11-06 22:37:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:37:28,324 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:28,438 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2023-11-06 22:37:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-06 22:37:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:28,441 INFO L225 Difference]: With dead ends: 235 [2023-11-06 22:37:28,441 INFO L226 Difference]: Without dead ends: 233 [2023-11-06 22:37:28,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:37:28,442 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:28,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-06 22:37:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2023-11-06 22:37:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-06 22:37:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2023-11-06 22:37:28,497 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2023-11-06 22:37:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:28,498 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2023-11-06 22:37:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2023-11-06 22:37:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:37:28,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:28,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:28,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:28,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:28,710 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:28,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2023-11-06 22:37:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:28,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138982632] [2023-11-06 22:37:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:28,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:28,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:28,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412814599] [2023-11-06 22:37:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:28,739 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:28,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:37:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:28,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:37:28,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:29,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138982632] [2023-11-06 22:37:29,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412814599] [2023-11-06 22:37:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412814599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:29,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:29,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2023-11-06 22:37:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951892096] [2023-11-06 22:37:29,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:29,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:37:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:37:29,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:37:29,421 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 22:37:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:30,504 INFO L93 Difference]: Finished difference Result 393 states and 571 transitions. [2023-11-06 22:37:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:37:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-11-06 22:37:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:30,510 INFO L225 Difference]: With dead ends: 393 [2023-11-06 22:37:30,510 INFO L226 Difference]: Without dead ends: 391 [2023-11-06 22:37:30,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:37:30,513 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 351 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:30,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 414 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:37:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-06 22:37:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 375. [2023-11-06 22:37:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 277 states have (on average 1.4151624548736461) internal successors, (392), 292 states have internal predecessors, (392), 81 states have call successors, (81), 16 states have call predecessors, (81), 16 states have return successors, (80), 66 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-06 22:37:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 553 transitions. [2023-11-06 22:37:30,674 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 553 transitions. Word has length 37 [2023-11-06 22:37:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 553 transitions. [2023-11-06 22:37:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 22:37:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 553 transitions. [2023-11-06 22:37:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:37:30,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:30,677 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:30,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:37:30,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:30,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2023-11-06 22:37:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:30,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868766083] [2023-11-06 22:37:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:30,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:30,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175945260] [2023-11-06 22:37:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:30,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:30,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:30,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:30,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:37:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:30,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:37:30,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:37:31,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:37:31,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868766083] [2023-11-06 22:37:31,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:31,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175945260] [2023-11-06 22:37:31,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175945260] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:31,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:37:31,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-11-06 22:37:31,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60217161] [2023-11-06 22:37:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:31,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:37:31,207 INFO L87 Difference]: Start difference. First operand 375 states and 553 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:37:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:31,383 INFO L93 Difference]: Finished difference Result 381 states and 558 transitions. [2023-11-06 22:37:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-11-06 22:37:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:31,387 INFO L225 Difference]: With dead ends: 381 [2023-11-06 22:37:31,387 INFO L226 Difference]: Without dead ends: 379 [2023-11-06 22:37:31,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:37:31,389 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:31,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-06 22:37:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-11-06 22:37:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 280 states have (on average 1.4035714285714285) internal successors, (393), 295 states have internal predecessors, (393), 81 states have call successors, (81), 17 states have call predecessors, (81), 17 states have return successors, (80), 66 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-06 22:37:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 554 transitions. [2023-11-06 22:37:31,529 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 554 transitions. Word has length 40 [2023-11-06 22:37:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:31,529 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 554 transitions. [2023-11-06 22:37:31,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:37:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 554 transitions. [2023-11-06 22:37:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 22:37:31,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:31,531 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:31,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:37:31,742 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:31,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2023-11-06 22:37:31,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:31,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024648446] [2023-11-06 22:37:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:31,753 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:31,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066807924] [2023-11-06 22:37:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:31,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:31,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:37:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:31,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:37:31,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:37:31,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:37:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024648446] [2023-11-06 22:37:31,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:31,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066807924] [2023-11-06 22:37:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066807924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:31,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:31,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:37:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785524] [2023-11-06 22:37:31,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:31,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:37:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:37:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:37:31,972 INFO L87 Difference]: Start difference. First operand 379 states and 554 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:32,425 INFO L93 Difference]: Finished difference Result 906 states and 1306 transitions. [2023-11-06 22:37:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:37:32,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-06 22:37:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:32,431 INFO L225 Difference]: With dead ends: 906 [2023-11-06 22:37:32,431 INFO L226 Difference]: Without dead ends: 643 [2023-11-06 22:37:32,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:37:32,433 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 126 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:32,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 219 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-11-06 22:37:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 613. [2023-11-06 22:37:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 442 states have (on average 1.3438914027149322) internal successors, (594), 460 states have internal predecessors, (594), 132 states have call successors, (132), 38 states have call predecessors, (132), 38 states have return successors, (128), 114 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-06 22:37:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 854 transitions. [2023-11-06 22:37:32,610 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 854 transitions. Word has length 38 [2023-11-06 22:37:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:32,611 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 854 transitions. [2023-11-06 22:37:32,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 854 transitions. [2023-11-06 22:37:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:37:32,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:32,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:37:32,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:32,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2023-11-06 22:37:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:32,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423303639] [2023-11-06 22:37:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:32,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:32,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176831363] [2023-11-06 22:37:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:32,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:32,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:32,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:37:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:32,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:37:32,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:32,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:37:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423303639] [2023-11-06 22:37:33,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176831363] [2023-11-06 22:37:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176831363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:33,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:37:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770597846] [2023-11-06 22:37:33,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:37:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:37:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:37:33,131 INFO L87 Difference]: Start difference. First operand 613 states and 854 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:33,763 INFO L93 Difference]: Finished difference Result 1319 states and 1867 transitions. [2023-11-06 22:37:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:37:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-11-06 22:37:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:33,771 INFO L225 Difference]: With dead ends: 1319 [2023-11-06 22:37:33,771 INFO L226 Difference]: Without dead ends: 936 [2023-11-06 22:37:33,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:37:33,774 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 210 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:33,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 262 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2023-11-06 22:37:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 896. [2023-11-06 22:37:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 640 states have (on average 1.309375) internal successors, (838), 662 states have internal predecessors, (838), 202 states have call successors, (202), 53 states have call predecessors, (202), 53 states have return successors, (196), 180 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-06 22:37:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1236 transitions. [2023-11-06 22:37:34,103 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1236 transitions. Word has length 39 [2023-11-06 22:37:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:34,104 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1236 transitions. [2023-11-06 22:37:34,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:37:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1236 transitions. [2023-11-06 22:37:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:37:34,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:34,105 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:34,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:37:34,312 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:34,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash -827121215, now seen corresponding path program 2 times [2023-11-06 22:37:34,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:34,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051611956] [2023-11-06 22:37:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:34,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:34,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:34,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874659044] [2023-11-06 22:37:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:34,327 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:34,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:37:34,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:34,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:34,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:37:34,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:37:34,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:34,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051611956] [2023-11-06 22:37:34,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874659044] [2023-11-06 22:37:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874659044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:34,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:34,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:34,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627889113] [2023-11-06 22:37:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:34,452 INFO L87 Difference]: Start difference. First operand 896 states and 1236 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:34,914 INFO L93 Difference]: Finished difference Result 1403 states and 1987 transitions. [2023-11-06 22:37:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:37:34,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-06 22:37:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:34,922 INFO L225 Difference]: With dead ends: 1403 [2023-11-06 22:37:34,923 INFO L226 Difference]: Without dead ends: 1035 [2023-11-06 22:37:34,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:37:34,925 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 30 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:34,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 175 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-11-06 22:37:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 857. [2023-11-06 22:37:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 622 states have (on average 1.3054662379421222) internal successors, (812), 644 states have internal predecessors, (812), 182 states have call successors, (182), 52 states have call predecessors, (182), 52 states have return successors, (176), 160 states have call predecessors, (176), 176 states have call successors, (176) [2023-11-06 22:37:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1170 transitions. [2023-11-06 22:37:35,170 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1170 transitions. Word has length 40 [2023-11-06 22:37:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:35,170 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1170 transitions. [2023-11-06 22:37:35,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 22:37:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1170 transitions. [2023-11-06 22:37:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:37:35,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:35,172 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:35,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:35,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:37:35,378 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:35,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2023-11-06 22:37:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395011525] [2023-11-06 22:37:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:35,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:35,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164733943] [2023-11-06 22:37:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:35,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:35,403 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:37:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:35,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:37:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:37:36,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 22:37:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395011525] [2023-11-06 22:37:38,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164733943] [2023-11-06 22:37:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164733943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:38,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:38,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-06 22:37:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067350383] [2023-11-06 22:37:38,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:38,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:37:38,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:37:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:37:38,021 INFO L87 Difference]: Start difference. First operand 857 states and 1170 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:37:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:53,393 INFO L93 Difference]: Finished difference Result 1531 states and 2072 transitions. [2023-11-06 22:37:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:37:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 54 [2023-11-06 22:37:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:53,403 INFO L225 Difference]: With dead ends: 1531 [2023-11-06 22:37:53,403 INFO L226 Difference]: Without dead ends: 1142 [2023-11-06 22:37:53,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:37:53,408 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 248 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:53,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 689 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-06 22:37:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2023-11-06 22:37:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1010. [2023-11-06 22:37:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 746 states have (on average 1.2935656836461127) internal successors, (965), 763 states have internal predecessors, (965), 198 states have call successors, (198), 65 states have call predecessors, (198), 65 states have return successors, (194), 181 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-06 22:37:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1357 transitions. [2023-11-06 22:37:53,889 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1357 transitions. Word has length 54 [2023-11-06 22:37:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:53,890 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1357 transitions. [2023-11-06 22:37:53,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-06 22:37:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1357 transitions. [2023-11-06 22:37:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:37:53,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:53,892 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:53,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:54,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:37:54,105 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:54,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:54,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2023-11-06 22:37:54,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:54,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922163887] [2023-11-06 22:37:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:54,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:54,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509483837] [2023-11-06 22:37:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:54,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:54,128 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:54,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:37:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:54,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:37:54,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:37:54,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:37:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922163887] [2023-11-06 22:37:54,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509483837] [2023-11-06 22:37:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509483837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:54,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:37:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:37:54,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833085311] [2023-11-06 22:37:54,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:54,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:37:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:37:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:37:54,585 INFO L87 Difference]: Start difference. First operand 1010 states and 1357 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-06 22:37:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:55,849 INFO L93 Difference]: Finished difference Result 2187 states and 3042 transitions. [2023-11-06 22:37:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:37:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2023-11-06 22:37:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:55,863 INFO L225 Difference]: With dead ends: 2187 [2023-11-06 22:37:55,864 INFO L226 Difference]: Without dead ends: 2165 [2023-11-06 22:37:55,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:37:55,866 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 286 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:55,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 329 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:37:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2023-11-06 22:37:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2044. [2023-11-06 22:37:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1521 states have (on average 1.3037475345167653) internal successors, (1983), 1563 states have internal predecessors, (1983), 415 states have call successors, (415), 107 states have call predecessors, (415), 107 states have return successors, (408), 373 states have call predecessors, (408), 408 states have call successors, (408) [2023-11-06 22:37:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2806 transitions. [2023-11-06 22:37:56,785 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2806 transitions. Word has length 60 [2023-11-06 22:37:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 2806 transitions. [2023-11-06 22:37:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-06 22:37:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2806 transitions. [2023-11-06 22:37:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 22:37:56,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:56,788 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:56,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:37:56,994 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:56,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 1 times [2023-11-06 22:37:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751197490] [2023-11-06 22:37:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:57,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288227322] [2023-11-06 22:37:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:57,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:57,014 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:57,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:37:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:57,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:37:57,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 22:37:57,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:37:57,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751197490] [2023-11-06 22:37:57,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:37:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288227322] [2023-11-06 22:37:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288227322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:37:57,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:37:57,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:37:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547809662] [2023-11-06 22:37:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:37:57,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:37:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:37:57,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:57,148 INFO L87 Difference]: Start difference. First operand 2044 states and 2806 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:37:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:58,317 INFO L93 Difference]: Finished difference Result 3557 states and 4970 transitions. [2023-11-06 22:37:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:37:58,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2023-11-06 22:37:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:58,334 INFO L225 Difference]: With dead ends: 3557 [2023-11-06 22:37:58,334 INFO L226 Difference]: Without dead ends: 2346 [2023-11-06 22:37:58,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:37:58,339 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:58,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:37:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2023-11-06 22:37:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2274. [2023-11-06 22:37:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 1647 states have (on average 1.304796599878567) internal successors, (2149), 1687 states have internal predecessors, (2149), 519 states have call successors, (519), 107 states have call predecessors, (519), 107 states have return successors, (512), 479 states have call predecessors, (512), 512 states have call successors, (512) [2023-11-06 22:37:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3180 transitions. [2023-11-06 22:37:59,758 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3180 transitions. Word has length 69 [2023-11-06 22:37:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:59,759 INFO L495 AbstractCegarLoop]: Abstraction has 2274 states and 3180 transitions. [2023-11-06 22:37:59,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-06 22:37:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3180 transitions. [2023-11-06 22:37:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 22:37:59,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:59,761 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:59,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:59,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:59,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:59,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 2 times [2023-11-06 22:37:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529180097] [2023-11-06 22:37:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:59,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:37:59,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743175382] [2023-11-06 22:37:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:59,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:59,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:59,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:38:00,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:00,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:00,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:38:00,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-06 22:38:01,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 22:38:03,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:03,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529180097] [2023-11-06 22:38:03,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:03,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743175382] [2023-11-06 22:38:03,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743175382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:03,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-11-06 22:38:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238603387] [2023-11-06 22:38:03,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:38:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:38:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:38:03,591 INFO L87 Difference]: Start difference. First operand 2274 states and 3180 transitions. Second operand has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-06 22:38:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:20,496 INFO L93 Difference]: Finished difference Result 3122 states and 4304 transitions. [2023-11-06 22:38:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:38:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 71 [2023-11-06 22:38:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:20,512 INFO L225 Difference]: With dead ends: 3122 [2023-11-06 22:38:20,512 INFO L226 Difference]: Without dead ends: 3116 [2023-11-06 22:38:20,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:38:20,516 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 454 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:20,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 840 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-06 22:38:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2023-11-06 22:38:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2779. [2023-11-06 22:38:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2085 states have (on average 1.3035971223021583) internal successors, (2718), 2129 states have internal predecessors, (2718), 556 states have call successors, (556), 138 states have call predecessors, (556), 137 states have return successors, (550), 511 states have call predecessors, (550), 550 states have call successors, (550) [2023-11-06 22:38:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3824 transitions. [2023-11-06 22:38:21,773 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3824 transitions. Word has length 71 [2023-11-06 22:38:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:21,774 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 3824 transitions. [2023-11-06 22:38:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.793103448275862) internal successors, (81), 27 states have internal predecessors, (81), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-06 22:38:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3824 transitions. [2023-11-06 22:38:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-06 22:38:21,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:21,775 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:21,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:21,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:21,981 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:21,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2023-11-06 22:38:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869396946] [2023-11-06 22:38:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:21,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:21,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:38:21,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148052661] [2023-11-06 22:38:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:21,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:21,997 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:22,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:38:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:22,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-06 22:38:22,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-06 22:38:23,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-06 22:38:36,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:36,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869396946] [2023-11-06 22:38:36,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:38:36,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148052661] [2023-11-06 22:38:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148052661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:36,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:38:36,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-11-06 22:38:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299877606] [2023-11-06 22:38:36,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:36,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:38:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:38:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:38:36,266 INFO L87 Difference]: Start difference. First operand 2779 states and 3824 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-06 22:38:38,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:39:11,822 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 22:39:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:22,712 INFO L93 Difference]: Finished difference Result 4279 states and 5965 transitions. [2023-11-06 22:39:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-06 22:39:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2023-11-06 22:39:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:22,736 INFO L225 Difference]: With dead ends: 4279 [2023-11-06 22:39:22,737 INFO L226 Difference]: Without dead ends: 4248 [2023-11-06 22:39:22,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1764, Invalid=6792, Unknown=0, NotChecked=0, Total=8556 [2023-11-06 22:39:22,741 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 498 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 345 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:22,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1417 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1310 Invalid, 1 Unknown, 0 Unchecked, 18.0s Time] [2023-11-06 22:39:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2023-11-06 22:39:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 3674. [2023-11-06 22:39:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2853 states have (on average 1.3235191026989135) internal successors, (3776), 2905 states have internal predecessors, (3776), 663 states have call successors, (663), 158 states have call predecessors, (663), 157 states have return successors, (657), 610 states have call predecessors, (657), 657 states have call successors, (657) [2023-11-06 22:39:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5096 transitions. [2023-11-06 22:39:25,847 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5096 transitions. Word has length 84 [2023-11-06 22:39:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:25,847 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5096 transitions. [2023-11-06 22:39:25,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-06 22:39:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5096 transitions. [2023-11-06 22:39:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-06 22:39:25,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:25,850 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:25,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:26,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:26,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:26,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2023-11-06 22:39:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490340598] [2023-11-06 22:39:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:26,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:39:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720870911] [2023-11-06 22:39:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:26,070 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:39:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:26,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:39:26,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:39:26,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-11-06 22:39:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490340598] [2023-11-06 22:39:26,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:39:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720870911] [2023-11-06 22:39:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720870911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:26,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:39:26,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-06 22:39:26,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786652607] [2023-11-06 22:39:26,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:26,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:39:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:39:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:39:26,605 INFO L87 Difference]: Start difference. First operand 3674 states and 5096 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-06 22:39:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:33,446 INFO L93 Difference]: Finished difference Result 7891 states and 11415 transitions. [2023-11-06 22:39:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:39:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2023-11-06 22:39:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:33,484 INFO L225 Difference]: With dead ends: 7891 [2023-11-06 22:39:33,484 INFO L226 Difference]: Without dead ends: 6125 [2023-11-06 22:39:33,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:39:33,491 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 437 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:33,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 477 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:39:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2023-11-06 22:39:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 5885. [2023-11-06 22:39:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 4194 states have (on average 1.3106819265617549) internal successors, (5497), 4255 states have internal predecessors, (5497), 1418 states have call successors, (1418), 273 states have call predecessors, (1418), 272 states have return successors, (1406), 1356 states have call predecessors, (1406), 1406 states have call successors, (1406) [2023-11-06 22:39:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 8321 transitions. [2023-11-06 22:39:38,976 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 8321 transitions. Word has length 94 [2023-11-06 22:39:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:38,977 INFO L495 AbstractCegarLoop]: Abstraction has 5885 states and 8321 transitions. [2023-11-06 22:39:38,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-06 22:39:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 8321 transitions. [2023-11-06 22:39:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:39:38,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:38,980 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:38,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:39,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:39:39,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:39,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2023-11-06 22:39:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068495076] [2023-11-06 22:39:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:39,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:39:39,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942162347] [2023-11-06 22:39:39,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:39,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:39,210 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:39,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:39:39,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:39,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:39,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:39:39,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-06 22:39:39,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-06 22:39:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068495076] [2023-11-06 22:39:39,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:39:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942162347] [2023-11-06 22:39:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942162347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:39,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:39:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-11-06 22:39:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644123095] [2023-11-06 22:39:39,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:39:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:39:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:39:39,560 INFO L87 Difference]: Start difference. First operand 5885 states and 8321 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:39:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:47,949 INFO L93 Difference]: Finished difference Result 8935 states and 13030 transitions. [2023-11-06 22:39:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:39:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2023-11-06 22:39:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:47,998 INFO L225 Difference]: With dead ends: 8935 [2023-11-06 22:39:47,999 INFO L226 Difference]: Without dead ends: 8073 [2023-11-06 22:39:48,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:39:48,004 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 168 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:48,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 604 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:39:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8073 states. [2023-11-06 22:39:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8073 to 6164. [2023-11-06 22:39:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6164 states, 4433 states have (on average 1.3142341529438304) internal successors, (5826), 4502 states have internal predecessors, (5826), 1458 states have call successors, (1458), 273 states have call predecessors, (1458), 272 states have return successors, (1446), 1388 states have call predecessors, (1446), 1446 states have call successors, (1446) [2023-11-06 22:39:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 8730 transitions. [2023-11-06 22:39:53,992 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 8730 transitions. Word has length 95 [2023-11-06 22:39:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:53,992 INFO L495 AbstractCegarLoop]: Abstraction has 6164 states and 8730 transitions. [2023-11-06 22:39:53,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 22:39:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 8730 transitions. [2023-11-06 22:39:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-06 22:39:53,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:53,996 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:54,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:54,201 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:54,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2023-11-06 22:39:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111194081] [2023-11-06 22:39:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:54,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:39:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661763008] [2023-11-06 22:39:54,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:54,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:54,214 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:54,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:39:54,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:54,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:54,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 22:39:54,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-06 22:39:55,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-06 22:40:04,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111194081] [2023-11-06 22:40:04,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:40:04,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661763008] [2023-11-06 22:40:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661763008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:04,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:40:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-11-06 22:40:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962142763] [2023-11-06 22:40:04,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:40:04,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:40:04,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:40:04,792 INFO L87 Difference]: Start difference. First operand 6164 states and 8730 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-06 22:41:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:20,506 INFO L93 Difference]: Finished difference Result 9844 states and 14013 transitions. [2023-11-06 22:41:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-06 22:41:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 104 [2023-11-06 22:41:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:20,527 INFO L225 Difference]: With dead ends: 9844 [2023-11-06 22:41:20,527 INFO L226 Difference]: Without dead ends: 7361 [2023-11-06 22:41:20,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=1727, Invalid=8173, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 22:41:20,539 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 391 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:20,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1047 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2023-11-06 22:41:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2023-11-06 22:41:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 6481. [2023-11-06 22:41:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 4624 states have (on average 1.3140138408304498) internal successors, (6076), 4693 states have internal predecessors, (6076), 1561 states have call successors, (1561), 295 states have call predecessors, (1561), 295 states have return successors, (1550), 1492 states have call predecessors, (1550), 1550 states have call successors, (1550) [2023-11-06 22:41:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 9187 transitions. [2023-11-06 22:41:26,958 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 9187 transitions. Word has length 104 [2023-11-06 22:41:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:26,959 INFO L495 AbstractCegarLoop]: Abstraction has 6481 states and 9187 transitions. [2023-11-06 22:41:26,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-06 22:41:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 9187 transitions. [2023-11-06 22:41:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-06 22:41:26,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:26,963 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:26,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:27,165 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:27,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1018938325, now seen corresponding path program 1 times [2023-11-06 22:41:27,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:27,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483944717] [2023-11-06 22:41:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:27,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:27,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:41:27,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078183087] [2023-11-06 22:41:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:27,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:27,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:27,186 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:27,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a8caeda-6215-452b-aa79-74ef905c3c30/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:41:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:27,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:41:27,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:41:27,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-06 22:41:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483944717] [2023-11-06 22:41:27,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:41:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078183087] [2023-11-06 22:41:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078183087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:27,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:41:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-06 22:41:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125818926] [2023-11-06 22:41:27,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:41:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:41:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:41:27,746 INFO L87 Difference]: Start difference. First operand 6481 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20)