./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/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_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/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_d3bff794-39f3-4831-bfaf-2c6a70f8d095/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 aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:22:09,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:22:09,935 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:22:09,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:22:09,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:22:10,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:22:10,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:22:10,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:22:10,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:22:10,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:22:10,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:22:10,018 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:22:10,019 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:22:10,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:22:10,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:22:10,023 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:22:10,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:22:10,024 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:22:10,024 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:22:10,025 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:22:10,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:22:10,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:22:10,026 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:22:10,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:22:10,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:22:10,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:22:10,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:22:10,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:22:10,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:10,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:22:10,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:22:10,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:22:10,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:22:10,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:22:10,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:22:10,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:22:10,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:22:10,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:22:10,035 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:22:10,035 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_d3bff794-39f3-4831-bfaf-2c6a70f8d095/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d [2023-11-06 22:22:10,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:22:10,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:22:10,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:22:10,391 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:22:10,392 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:22:10,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-11-06 22:22:14,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:22:14,252 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:22:14,252 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-11-06 22:22:14,269 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/data/6b7e2b106/d5082023db964a95a069fffeaa1328d4/FLAGd595ecfef [2023-11-06 22:22:14,284 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/data/6b7e2b106/d5082023db964a95a069fffeaa1328d4 [2023-11-06 22:22:14,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:22:14,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:22:14,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:14,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:22:14,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:22:14,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382ec4f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14, skipping insertion in model container [2023-11-06 22:22:14,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:22:14,494 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_d3bff794-39f3-4831-bfaf-2c6a70f8d095/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2023-11-06 22:22:14,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:14,528 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:22:14,544 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_d3bff794-39f3-4831-bfaf-2c6a70f8d095/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2023-11-06 22:22:14,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:22:14,571 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:22:14,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14 WrapperNode [2023-11-06 22:22:14,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:22:14,574 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:14,574 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:22:14,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:22:14,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,631 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-11-06 22:22:14,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:22:14,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:22:14,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:22:14,635 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:22:14,646 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:22:14,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:22:14,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:22:14,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:22:14,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (1/1) ... [2023-11-06 22:22:14,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:22:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:14,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:22:14,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:22:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:22:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:22:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:22:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:22:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:22:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:22:14,880 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:22:14,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:22:15,069 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:22:15,076 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:22:15,076 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:22:15,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:15 BoogieIcfgContainer [2023-11-06 22:22:15,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:22:15,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:22:15,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:22:15,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:22:15,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:22:14" (1/3) ... [2023-11-06 22:22:15,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555763ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:15, skipping insertion in model container [2023-11-06 22:22:15,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:22:14" (2/3) ... [2023-11-06 22:22:15,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555763ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:22:15, skipping insertion in model container [2023-11-06 22:22:15,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:22:15" (3/3) ... [2023-11-06 22:22:15,092 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound100.c [2023-11-06 22:22:15,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:22:15,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:22:15,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:22:15,182 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;@34e5c160, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:22:15,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:22:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:22:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 22:22:15,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:15,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:15,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:15,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2023-11-06 22:22:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:15,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922387687] [2023-11-06 22:22:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:15,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922387687] [2023-11-06 22:22:15,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:22:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917927670] [2023-11-06 22:22:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:15,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:15,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:22:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:22:15,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:15,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917927670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:15,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:22:15,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987410231] [2023-11-06 22:22:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:22:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:22:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:22:15,619 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:15,637 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-11-06 22:22:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:22:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 22:22:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:15,645 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:22:15,645 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 22:22:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:22:15,652 INFO L413 NwaCegarLoop]: 23 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, 23 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 22:22:15,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:22:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 22:22:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-06 22:22:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-06 22:22:15,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-11-06 22:22:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:15,691 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-06 22:22:15,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-06 22:22:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:22:15,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:15,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:15,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:15,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:22:15,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:15,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2023-11-06 22:22:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697413131] [2023-11-06 22:22:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697413131] [2023-11-06 22:22:15,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:22:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741388889] [2023-11-06 22:22:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:15,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:15,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:15,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:22:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:22:16,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741388889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:22:16,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630665754] [2023-11-06 22:22:16,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:16,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:22:16,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:22:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:16,071 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:16,092 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-06 22:22:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:22:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:22:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:16,094 INFO L225 Difference]: With dead ends: 26 [2023-11-06 22:22:16,094 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:22:16,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:22:16,097 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:16,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:22:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:22:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 22:22:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-06 22:22:16,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2023-11-06 22:22:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:16,142 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-06 22:22:16,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-06 22:22:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:22:16,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:16,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:16,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:16,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2023-11-06 22:22:16,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955398147] [2023-11-06 22:22:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:16,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:16,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589331966] [2023-11-06 22:22:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:16,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:16,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:22:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:22:16,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:16,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:22:16,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955398147] [2023-11-06 22:22:16,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589331966] [2023-11-06 22:22:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589331966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:22:16,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:22:16,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:22:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997342936] [2023-11-06 22:22:16,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:22:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:22:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:22:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:22:16,534 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:16,594 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-06 22:22:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:22:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:22:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:16,596 INFO L225 Difference]: With dead ends: 28 [2023-11-06 22:22:16,596 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 22:22:16,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:22:16,599 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:16,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:22:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 22:22:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 22:22:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:22:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-06 22:22:16,608 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2023-11-06 22:22:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:16,608 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-06 22:22:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:22:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-06 22:22:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:22:16,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:16,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:16,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:16,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2023-11-06 22:22:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827032105] [2023-11-06 22:22:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:16,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412940624] [2023-11-06 22:22:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:16,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:16,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:22:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:16,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:22:16,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:17,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827032105] [2023-11-06 22:22:17,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:17,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412940624] [2023-11-06 22:22:17,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412940624] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:17,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:17,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-06 22:22:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271887406] [2023-11-06 22:22:17,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:22:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:22:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:22:17,122 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:17,253 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-11-06 22:22:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:22:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:22:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:17,256 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:22:17,256 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:22:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:22:17,259 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:17,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 68 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:22:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-11-06 22:22:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:22:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-06 22:22:17,273 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2023-11-06 22:22:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:17,273 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-06 22:22:17,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-06 22:22:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:22:17,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:17,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:17,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:17,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:17,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:17,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2023-11-06 22:22:17,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:17,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619056276] [2023-11-06 22:22:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:17,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:17,503 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:17,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67572191] [2023-11-06 22:22:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:17,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:17,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:22:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:17,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:22:17,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:17,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:22:17,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:22:17,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619056276] [2023-11-06 22:22:17,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:22:17,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67572191] [2023-11-06 22:22:17,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67572191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:22:17,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:22:17,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-06 22:22:17,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762402385] [2023-11-06 22:22:17,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:22:17,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:22:17,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:22:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:22:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:22:17,937 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:22:18,057 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-11-06 22:22:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:22:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-06 22:22:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:22:18,060 INFO L225 Difference]: With dead ends: 60 [2023-11-06 22:22:18,060 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 22:22:18,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:22:18,062 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:22:18,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:22:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 22:22:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-11-06 22:22:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:22:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-11-06 22:22:18,108 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2023-11-06 22:22:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:22:18,109 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-11-06 22:22:18,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:22:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-11-06 22:22:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:22:18,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:22:18,111 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:22:18,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:22:18,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:18,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:22:18,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:22:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2023-11-06 22:22:18,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:22:18,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563405148] [2023-11-06 22:22:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:22:18,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:22:18,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620000921] [2023-11-06 22:22:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:22:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:22:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:22:18,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:22:18,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:22:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:22:18,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:22:18,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:22:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:22:18,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:22:22,687 WARN L839 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2023-11-06 22:22:40,961 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2023-11-06 22:22:59,067 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-11-06 22:23:05,179 WARN L839 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2023-11-06 22:23:17,379 WARN L839 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2023-11-06 22:23:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-11-06 22:23:23,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563405148] [2023-11-06 22:23:23,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620000921] [2023-11-06 22:23:23,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620000921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:23,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:23,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-11-06 22:23:23,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634040473] [2023-11-06 22:23:23,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:23:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:23:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=92, Unknown=5, NotChecked=110, Total=240 [2023-11-06 22:23:23,440 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:23:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:23,652 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-11-06 22:23:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:23:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2023-11-06 22:23:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:23,655 INFO L225 Difference]: With dead ends: 51 [2023-11-06 22:23:23,655 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:23:23,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=51, Invalid=146, Unknown=5, NotChecked=140, Total=342 [2023-11-06 22:23:23,657 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:23,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2023-11-06 22:23:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:23:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-06 22:23:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:23:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-06 22:23:23,672 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2023-11-06 22:23:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:23,673 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-06 22:23:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 22:23:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-06 22:23:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:23:23,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:23,675 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:23,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:23,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:23,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2023-11-06 22:23:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782743543] [2023-11-06 22:23:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:23,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:23,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249055018] [2023-11-06 22:23:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:23,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:23:24,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:23:24,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:24,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:23:24,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:23:24,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:23:24,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:24,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782743543] [2023-11-06 22:23:24,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:24,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249055018] [2023-11-06 22:23:24,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249055018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:24,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:24,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-06 22:23:24,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621091649] [2023-11-06 22:23:24,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:23:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:23:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:23:24,482 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:23:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:24,949 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-11-06 22:23:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:23:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2023-11-06 22:23:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:24,951 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:23:24,951 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:23:24,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:23:24,953 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:24,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 199 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:23:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:23:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-11-06 22:23:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:23:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-06 22:23:24,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2023-11-06 22:23:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:24,975 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-06 22:23:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:23:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-06 22:23:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 22:23:24,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:24,981 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:24,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:25,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:25,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2023-11-06 22:23:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:25,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668162599] [2023-11-06 22:23:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:25,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:25,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:25,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116317106] [2023-11-06 22:23:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:25,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:25,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:25,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:23:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:23:25,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:23:25,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:23:25,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 22:23:25,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:25,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668162599] [2023-11-06 22:23:25,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116317106] [2023-11-06 22:23:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116317106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:25,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:25,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:23:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990094461] [2023-11-06 22:23:25,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:25,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:23:25,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:23:25,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:23:25,555 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-06 22:23:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:25,816 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2023-11-06 22:23:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:23:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2023-11-06 22:23:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:25,818 INFO L225 Difference]: With dead ends: 126 [2023-11-06 22:23:25,818 INFO L226 Difference]: Without dead ends: 116 [2023-11-06 22:23:25,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:23:25,820 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:25,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 101 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:23:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-06 22:23:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2023-11-06 22:23:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-06 22:23:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2023-11-06 22:23:25,853 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2023-11-06 22:23:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:25,853 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2023-11-06 22:23:25,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-06 22:23:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2023-11-06 22:23:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:23:25,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:25,855 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:25,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:26,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:26,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:26,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2023-11-06 22:23:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919335842] [2023-11-06 22:23:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:26,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:26,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:26,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595849946] [2023-11-06 22:23:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:23:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:26,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:26,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:23:31,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:23:31,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:31,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:23:31,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 22:23:32,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-06 22:23:32,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919335842] [2023-11-06 22:23:32,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595849946] [2023-11-06 22:23:32,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595849946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:32,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:32,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-11-06 22:23:32,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381763991] [2023-11-06 22:23:32,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:32,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:23:32,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:23:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:23:32,751 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 22:23:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:33,811 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-11-06 22:23:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:23:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 61 [2023-11-06 22:23:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:33,813 INFO L225 Difference]: With dead ends: 113 [2023-11-06 22:23:33,813 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 22:23:33,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:23:33,815 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 48 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:33,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 431 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:23:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 22:23:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-11-06 22:23:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:23:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-11-06 22:23:33,864 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 61 [2023-11-06 22:23:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:33,865 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-11-06 22:23:33,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-06 22:23:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-11-06 22:23:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:23:33,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:33,873 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:33,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 22:23:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:34,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:34,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2023-11-06 22:23:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084247541] [2023-11-06 22:23:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:34,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:34,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494097856] [2023-11-06 22:23:34,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:23:34,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:34,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:34,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:23:34,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:23:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:34,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:23:34,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:23:34,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-06 22:23:34,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084247541] [2023-11-06 22:23:34,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494097856] [2023-11-06 22:23:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494097856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:34,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:34,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-06 22:23:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287506628] [2023-11-06 22:23:34,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:23:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:23:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:23:34,800 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-06 22:23:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:35,510 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2023-11-06 22:23:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:23:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 95 [2023-11-06 22:23:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:35,515 INFO L225 Difference]: With dead ends: 258 [2023-11-06 22:23:35,516 INFO L226 Difference]: Without dead ends: 248 [2023-11-06 22:23:35,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:23:35,518 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:35,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 166 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:23:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-06 22:23:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2023-11-06 22:23:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 151 states have internal predecessors, (153), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (33), 23 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-06 22:23:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2023-11-06 22:23:35,605 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 95 [2023-11-06 22:23:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:35,605 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2023-11-06 22:23:35,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-06 22:23:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2023-11-06 22:23:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 22:23:35,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:35,609 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:35,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:35,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:23:35,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:35,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1584846500, now seen corresponding path program 4 times [2023-11-06 22:23:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:35,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472274705] [2023-11-06 22:23:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:35,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:35,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549914560] [2023-11-06 22:23:35,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:23:35,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:35,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:35,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:23:35,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:23:35,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:23:35,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:23:35,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:23:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:23:36,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:23:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:23:37,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:23:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472274705] [2023-11-06 22:23:37,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:23:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549914560] [2023-11-06 22:23:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549914560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:23:37,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:23:37,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-11-06 22:23:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753799225] [2023-11-06 22:23:37,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:23:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:23:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:23:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:23:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:23:37,110 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 32 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:23:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:23:38,362 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2023-11-06 22:23:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:23:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 109 [2023-11-06 22:23:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:23:38,365 INFO L225 Difference]: With dead ends: 205 [2023-11-06 22:23:38,365 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 22:23:38,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:23:38,368 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 37 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:23:38,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 861 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:23:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 22:23:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-06 22:23:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-06 22:23:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2023-11-06 22:23:38,435 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 109 [2023-11-06 22:23:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:23:38,436 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2023-11-06 22:23:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:23:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2023-11-06 22:23:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-06 22:23:38,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:23:38,440 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:23:38,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:23:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:23:38,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:23:38,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:23:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -988750525, now seen corresponding path program 3 times [2023-11-06 22:23:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:23:38,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992440211] [2023-11-06 22:23:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:23:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:23:38,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:23:38,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439468598] [2023-11-06 22:23:38,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:23:38,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:23:38,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:23:38,693 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:23:38,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3bff794-39f3-4831-bfaf-2c6a70f8d095/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process