./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/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_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/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_e2997e91-fe64-4140-bb02-a040dcb64e9a/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 17ab865f0f00c0e81e7df8c769539048861e387663f5be28b491c6160e2a443b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:45:13,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:45:13,222 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:45:13,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:45:13,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:45:13,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:45:13,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:45:13,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:45:13,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:45:13,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:45:13,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:45:13,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:45:13,291 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:45:13,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:45:13,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:45:13,294 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:45:13,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:45:13,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:45:13,296 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:45:13,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:45:13,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:45:13,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:45:13,298 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:45:13,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:45:13,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:45:13,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:45:13,301 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:45:13,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:45:13,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:13,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:45:13,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:45:13,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:45:13,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:45:13,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:45:13,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:45:13,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:45:13,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:45:13,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:45:13,306 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:45:13,307 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_e2997e91-fe64-4140-bb02-a040dcb64e9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17ab865f0f00c0e81e7df8c769539048861e387663f5be28b491c6160e2a443b [2023-11-06 22:45:13,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:45:13,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:45:13,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:45:13,706 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:45:13,707 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:45:13,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i [2023-11-06 22:45:17,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:45:17,902 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:45:17,907 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i [2023-11-06 22:45:17,934 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/data/bf7587374/1ee52d7da2f54f55828721aee41e562b/FLAG581dc89e6 [2023-11-06 22:45:17,950 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/data/bf7587374/1ee52d7da2f54f55828721aee41e562b [2023-11-06 22:45:17,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:45:17,955 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:45:17,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:17,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:45:17,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:45:17,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:17" (1/1) ... [2023-11-06 22:45:17,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75685aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:17, skipping insertion in model container [2023-11-06 22:45:17,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:17" (1/1) ... [2023-11-06 22:45:18,071 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:45:18,281 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_e2997e91-fe64-4140-bb02-a040dcb64e9a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i[916,929] [2023-11-06 22:45:18,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:18,720 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:45:18,734 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_e2997e91-fe64-4140-bb02-a040dcb64e9a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-82.i[916,929] [2023-11-06 22:45:18,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:45:18,934 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:45:18,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18 WrapperNode [2023-11-06 22:45:18,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:45:18,936 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:18,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:45:18,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:45:18,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:18,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,193 INFO L138 Inliner]: procedures = 26, calls = 77, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 727 [2023-11-06 22:45:19,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:45:19,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:45:19,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:45:19,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:45:19,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,331 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:45:19,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:45:19,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:45:19,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:45:19,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (1/1) ... [2023-11-06 22:45:19,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:19,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:45:19,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:45:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:45:19,493 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:45:19,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:45:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:45:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:45:19,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:45:19,700 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:45:19,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:45:21,806 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:45:21,829 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:45:21,829 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:45:21,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:21 BoogieIcfgContainer [2023-11-06 22:45:21,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:45:21,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:45:21,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:45:21,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:45:21,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:17" (1/3) ... [2023-11-06 22:45:21,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2255ff42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:21, skipping insertion in model container [2023-11-06 22:45:21,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:18" (2/3) ... [2023-11-06 22:45:21,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2255ff42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:21, skipping insertion in model container [2023-11-06 22:45:21,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:21" (3/3) ... [2023-11-06 22:45:21,862 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-82.i [2023-11-06 22:45:21,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:45:21,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:45:21,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:45:21,993 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;@6b92ac8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:45:21,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:45:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 282 states, 215 states have (on average 1.5906976744186045) internal successors, (342), 216 states have internal predecessors, (342), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-06 22:45:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:45:22,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:22,054 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:22,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:22,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1259983855, now seen corresponding path program 1 times [2023-11-06 22:45:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:22,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912544739] [2023-11-06 22:45:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:22,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:22,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912544739] [2023-11-06 22:45:22,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:45:22,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804640364] [2023-11-06 22:45:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:22,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:22,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:45:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:23,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:45:23,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2023-11-06 22:45:23,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804640364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:23,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:23,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:45:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139123389] [2023-11-06 22:45:23,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:45:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:45:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:45:23,521 INFO L87 Difference]: Start difference. First operand has 282 states, 215 states have (on average 1.5906976744186045) internal successors, (342), 216 states have internal predecessors, (342), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-06 22:45:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:23,654 INFO L93 Difference]: Finished difference Result 556 states and 996 transitions. [2023-11-06 22:45:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:45:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) Word has length 442 [2023-11-06 22:45:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:23,673 INFO L225 Difference]: With dead ends: 556 [2023-11-06 22:45:23,674 INFO L226 Difference]: Without dead ends: 277 [2023-11-06 22:45:23,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 441 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 22:45:23,687 INFO L413 NwaCegarLoop]: 460 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, 460 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 22:45:23,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:45:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-06 22:45:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2023-11-06 22:45:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 211 states have (on average 1.5734597156398105) internal successors, (332), 211 states have internal predecessors, (332), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-06 22:45:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 460 transitions. [2023-11-06 22:45:23,792 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 460 transitions. Word has length 442 [2023-11-06 22:45:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:23,793 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 460 transitions. [2023-11-06 22:45:23,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-06 22:45:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 460 transitions. [2023-11-06 22:45:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-11-06 22:45:23,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:23,811 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:23,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:24,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:24,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:24,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1045124327, now seen corresponding path program 1 times [2023-11-06 22:45:24,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:24,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627249718] [2023-11-06 22:45:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:24,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:24,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:24,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873109487] [2023-11-06 22:45:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:24,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:24,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:45:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:24,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:45:24,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:45:25,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627249718] [2023-11-06 22:45:25,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873109487] [2023-11-06 22:45:25,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873109487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:25,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:25,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:45:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134685372] [2023-11-06 22:45:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:25,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:45:25,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:45:25,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:45:25,873 INFO L87 Difference]: Start difference. First operand 277 states and 460 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:27,759 INFO L93 Difference]: Finished difference Result 1491 states and 2486 transitions. [2023-11-06 22:45:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:45:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 442 [2023-11-06 22:45:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:27,778 INFO L225 Difference]: With dead ends: 1491 [2023-11-06 22:45:27,778 INFO L226 Difference]: Without dead ends: 1217 [2023-11-06 22:45:27,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:45:27,783 INFO L413 NwaCegarLoop]: 1031 mSDtfsCounter, 1541 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:27,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1541 Valid, 2622 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:45:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-11-06 22:45:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 979. [2023-11-06 22:45:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 718 states have (on average 1.5543175487465182) internal successors, (1116), 718 states have internal predecessors, (1116), 256 states have call successors, (256), 4 states have call predecessors, (256), 4 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-06 22:45:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1628 transitions. [2023-11-06 22:45:28,080 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1628 transitions. Word has length 442 [2023-11-06 22:45:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:28,088 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1628 transitions. [2023-11-06 22:45:28,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1628 transitions. [2023-11-06 22:45:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 22:45:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:28,104 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:28,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:28,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:28,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:28,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2116589526, now seen corresponding path program 1 times [2023-11-06 22:45:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:28,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966140563] [2023-11-06 22:45:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:28,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248050042] [2023-11-06 22:45:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:28,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:28,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:28,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:45:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:28,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:45:28,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:45:30,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966140563] [2023-11-06 22:45:30,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248050042] [2023-11-06 22:45:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248050042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:30,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:30,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:45:30,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995765886] [2023-11-06 22:45:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:45:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:45:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:45:30,932 INFO L87 Difference]: Start difference. First operand 979 states and 1628 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:31,613 INFO L93 Difference]: Finished difference Result 2967 states and 4951 transitions. [2023-11-06 22:45:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:45:31,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 443 [2023-11-06 22:45:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:31,636 INFO L225 Difference]: With dead ends: 2967 [2023-11-06 22:45:31,636 INFO L226 Difference]: Without dead ends: 2120 [2023-11-06 22:45:31,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:31,642 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 758 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:31,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1777 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:45:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2023-11-06 22:45:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1813. [2023-11-06 22:45:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1357 states have (on average 1.5534266764922624) internal successors, (2108), 1357 states have internal predecessors, (2108), 448 states have call successors, (448), 7 states have call predecessors, (448), 7 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-06 22:45:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3004 transitions. [2023-11-06 22:45:32,021 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3004 transitions. Word has length 443 [2023-11-06 22:45:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:32,022 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 3004 transitions. [2023-11-06 22:45:32,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3004 transitions. [2023-11-06 22:45:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 22:45:32,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:32,038 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:32,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:32,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:32,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:32,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:32,249 INFO L85 PathProgramCache]: Analyzing trace with hash -216803112, now seen corresponding path program 1 times [2023-11-06 22:45:32,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167020963] [2023-11-06 22:45:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:32,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:32,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:32,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533331537] [2023-11-06 22:45:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:32,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:32,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:32,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:32,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:45:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:32,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:32,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3789 proven. 120 refuted. 0 times theorem prover too weak. 4155 trivial. 0 not checked. [2023-11-06 22:45:33,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-06 22:45:34,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167020963] [2023-11-06 22:45:34,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533331537] [2023-11-06 22:45:34,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533331537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:34,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:45:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378177072] [2023-11-06 22:45:34,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:45:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:45:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:45:34,191 INFO L87 Difference]: Start difference. First operand 1813 states and 3004 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:45:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:34,890 INFO L93 Difference]: Finished difference Result 3536 states and 5830 transitions. [2023-11-06 22:45:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:45:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 443 [2023-11-06 22:45:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:34,915 INFO L225 Difference]: With dead ends: 3536 [2023-11-06 22:45:34,915 INFO L226 Difference]: Without dead ends: 1855 [2023-11-06 22:45:34,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:45:34,930 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 293 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:34,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 983 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:45:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2023-11-06 22:45:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1841. [2023-11-06 22:45:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1378 states have (on average 1.5362844702467344) internal successors, (2117), 1378 states have internal predecessors, (2117), 448 states have call successors, (448), 14 states have call predecessors, (448), 14 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-06 22:45:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 3013 transitions. [2023-11-06 22:45:35,266 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 3013 transitions. Word has length 443 [2023-11-06 22:45:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:35,267 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 3013 transitions. [2023-11-06 22:45:35,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:45:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 3013 transitions. [2023-11-06 22:45:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 22:45:35,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:35,277 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:35,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:35,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:35,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:35,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:35,495 INFO L85 PathProgramCache]: Analyzing trace with hash 60110129, now seen corresponding path program 1 times [2023-11-06 22:45:35,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:35,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115459135] [2023-11-06 22:45:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:35,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:35,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411784308] [2023-11-06 22:45:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:35,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:35,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:45:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:36,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:36,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4093 proven. 96 refuted. 0 times theorem prover too weak. 3875 trivial. 0 not checked. [2023-11-06 22:45:36,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 93 proven. 96 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-06 22:45:37,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115459135] [2023-11-06 22:45:37,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:37,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411784308] [2023-11-06 22:45:37,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411784308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:37,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:37,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:45:37,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915383409] [2023-11-06 22:45:37,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:37,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:45:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:45:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:45:37,276 INFO L87 Difference]: Start difference. First operand 1841 states and 3013 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-06 22:45:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:38,068 INFO L93 Difference]: Finished difference Result 3588 states and 5845 transitions. [2023-11-06 22:45:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:45:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 443 [2023-11-06 22:45:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:38,087 INFO L225 Difference]: With dead ends: 3588 [2023-11-06 22:45:38,088 INFO L226 Difference]: Without dead ends: 1883 [2023-11-06 22:45:38,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:45:38,095 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 290 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1004 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:45:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-11-06 22:45:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1869. [2023-11-06 22:45:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1399 states have (on average 1.5239456754824874) internal successors, (2132), 1399 states have internal predecessors, (2132), 448 states have call successors, (448), 21 states have call predecessors, (448), 21 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-06 22:45:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3028 transitions. [2023-11-06 22:45:38,466 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3028 transitions. Word has length 443 [2023-11-06 22:45:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:38,469 INFO L495 AbstractCegarLoop]: Abstraction has 1869 states and 3028 transitions. [2023-11-06 22:45:38,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-06 22:45:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3028 transitions. [2023-11-06 22:45:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 22:45:38,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:38,477 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:38,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:38,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:38,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -354819975, now seen corresponding path program 1 times [2023-11-06 22:45:38,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:38,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123851078] [2023-11-06 22:45:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:38,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343693057] [2023-11-06 22:45:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:38,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:38,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:45:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:39,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:45:39,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-06 22:45:39,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123851078] [2023-11-06 22:45:39,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:39,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343693057] [2023-11-06 22:45:39,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343693057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:39,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:39,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:45:39,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355996067] [2023-11-06 22:45:39,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:45:39,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:45:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:45:39,589 INFO L87 Difference]: Start difference. First operand 1869 states and 3028 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 2 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:40,377 INFO L93 Difference]: Finished difference Result 3654 states and 5886 transitions. [2023-11-06 22:45:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:45:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 2 states have call predecessors, (64), 1 states have call successors, (64) Word has length 443 [2023-11-06 22:45:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:40,400 INFO L225 Difference]: With dead ends: 3654 [2023-11-06 22:45:40,401 INFO L226 Difference]: Without dead ends: 1925 [2023-11-06 22:45:40,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:45:40,409 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 367 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:40,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1025 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:45:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2023-11-06 22:45:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1897. [2023-11-06 22:45:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1420 states have (on average 1.5049295774647888) internal successors, (2137), 1420 states have internal predecessors, (2137), 448 states have call successors, (448), 28 states have call predecessors, (448), 28 states have return successors, (448), 448 states have call predecessors, (448), 448 states have call successors, (448) [2023-11-06 22:45:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3033 transitions. [2023-11-06 22:45:40,779 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3033 transitions. Word has length 443 [2023-11-06 22:45:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:40,780 INFO L495 AbstractCegarLoop]: Abstraction has 1897 states and 3033 transitions. [2023-11-06 22:45:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (64), 1 states have call predecessors, (64), 2 states have return successors, (64), 2 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3033 transitions. [2023-11-06 22:45:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-11-06 22:45:40,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:40,788 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:40,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:41,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:41,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2059539061, now seen corresponding path program 1 times [2023-11-06 22:45:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:41,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67302833] [2023-11-06 22:45:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:41,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:41,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392318246] [2023-11-06 22:45:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:41,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:41,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:45:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:41,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:45:41,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:45:42,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:45:42,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:42,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67302833] [2023-11-06 22:45:42,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:42,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392318246] [2023-11-06 22:45:42,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392318246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:45:42,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:45:42,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:45:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840195748] [2023-11-06 22:45:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:45:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:45:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:45:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:45:42,489 INFO L87 Difference]: Start difference. First operand 1897 states and 3033 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:43,728 INFO L93 Difference]: Finished difference Result 6834 states and 10953 transitions. [2023-11-06 22:45:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:45:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 443 [2023-11-06 22:45:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:43,772 INFO L225 Difference]: With dead ends: 6834 [2023-11-06 22:45:43,772 INFO L226 Difference]: Without dead ends: 5081 [2023-11-06 22:45:43,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:45:43,782 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 2202 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2202 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:43,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2202 Valid, 2262 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:45:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2023-11-06 22:45:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4314. [2023-11-06 22:45:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4314 states, 3488 states have (on average 1.5467316513761469) internal successors, (5395), 3497 states have internal predecessors, (5395), 775 states have call successors, (775), 50 states have call predecessors, (775), 50 states have return successors, (775), 766 states have call predecessors, (775), 775 states have call successors, (775) [2023-11-06 22:45:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4314 states to 4314 states and 6945 transitions. [2023-11-06 22:45:44,334 INFO L78 Accepts]: Start accepts. Automaton has 4314 states and 6945 transitions. Word has length 443 [2023-11-06 22:45:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:44,336 INFO L495 AbstractCegarLoop]: Abstraction has 4314 states and 6945 transitions. [2023-11-06 22:45:44,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:45:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4314 states and 6945 transitions. [2023-11-06 22:45:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-11-06 22:45:44,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:44,346 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:44,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:44,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash -33078475, now seen corresponding path program 1 times [2023-11-06 22:45:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:44,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775826284] [2023-11-06 22:45:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:44,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:44,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993165649] [2023-11-06 22:45:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:44,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:44,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:45:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:45,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:45:45,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 2835 proven. 147 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2023-11-06 22:45:46,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 42 proven. 147 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-06 22:45:47,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775826284] [2023-11-06 22:45:47,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993165649] [2023-11-06 22:45:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993165649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:47,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-06 22:45:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378818236] [2023-11-06 22:45:47,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:47,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:45:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:45:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:45:47,165 INFO L87 Difference]: Start difference. First operand 4314 states and 6945 transitions. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-06 22:45:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:45:52,379 INFO L93 Difference]: Finished difference Result 18358 states and 29135 transitions. [2023-11-06 22:45:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:45:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) Word has length 444 [2023-11-06 22:45:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:45:52,494 INFO L225 Difference]: With dead ends: 18358 [2023-11-06 22:45:52,494 INFO L226 Difference]: Without dead ends: 14192 [2023-11-06 22:45:52,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=1570, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:45:52,512 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 3114 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3144 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:45:52,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3144 Valid, 2270 Invalid, 1983 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [563 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:45:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14192 states. [2023-11-06 22:45:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14192 to 6742. [2023-11-06 22:45:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 5933 states have (on average 1.5841901230406203) internal successors, (9399), 5942 states have internal predecessors, (9399), 748 states have call successors, (748), 60 states have call predecessors, (748), 60 states have return successors, (748), 739 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-06 22:45:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 10895 transitions. [2023-11-06 22:45:53,843 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 10895 transitions. Word has length 444 [2023-11-06 22:45:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:45:53,845 INFO L495 AbstractCegarLoop]: Abstraction has 6742 states and 10895 transitions. [2023-11-06 22:45:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-06 22:45:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 10895 transitions. [2023-11-06 22:45:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2023-11-06 22:45:53,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:45:53,860 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:53,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:54,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:45:54,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1060556945, now seen corresponding path program 1 times [2023-11-06 22:45:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365703563] [2023-11-06 22:45:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:54,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:45:54,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433484862] [2023-11-06 22:45:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:54,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:54,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:45:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:54,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:45:54,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4989 proven. 243 refuted. 0 times theorem prover too weak. 2832 trivial. 0 not checked. [2023-11-06 22:45:56,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 129 proven. 246 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-06 22:45:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365703563] [2023-11-06 22:45:57,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:45:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433484862] [2023-11-06 22:45:57,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433484862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:57,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:57,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2023-11-06 22:45:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138236761] [2023-11-06 22:45:57,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:45:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:45:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:45:57,377 INFO L87 Difference]: Start difference. First operand 6742 states and 10895 transitions. Second operand has 19 states, 18 states have (on average 13.222222222222221) internal successors, (238), 19 states have internal predecessors, (238), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) [2023-11-06 22:46:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:02,320 INFO L93 Difference]: Finished difference Result 20020 states and 32146 transitions. [2023-11-06 22:46:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:46:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 13.222222222222221) internal successors, (238), 19 states have internal predecessors, (238), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) Word has length 446 [2023-11-06 22:46:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:02,372 INFO L225 Difference]: With dead ends: 20020 [2023-11-06 22:46:02,372 INFO L226 Difference]: Without dead ends: 13430 [2023-11-06 22:46:02,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:46:02,391 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 2159 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:02,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 2228 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 22:46:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13430 states. [2023-11-06 22:46:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13430 to 6792. [2023-11-06 22:46:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6792 states, 6071 states have (on average 1.5847471586229616) internal successors, (9621), 6071 states have internal predecessors, (9621), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 640 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:46:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6792 states to 6792 states and 10901 transitions. [2023-11-06 22:46:03,263 INFO L78 Accepts]: Start accepts. Automaton has 6792 states and 10901 transitions. Word has length 446 [2023-11-06 22:46:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:03,265 INFO L495 AbstractCegarLoop]: Abstraction has 6792 states and 10901 transitions. [2023-11-06 22:46:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 13.222222222222221) internal successors, (238), 19 states have internal predecessors, (238), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) [2023-11-06 22:46:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6792 states and 10901 transitions. [2023-11-06 22:46:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-11-06 22:46:03,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:03,280 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:03,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:03,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:03,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:03,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:03,491 INFO L85 PathProgramCache]: Analyzing trace with hash -506031164, now seen corresponding path program 1 times [2023-11-06 22:46:03,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:03,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722068663] [2023-11-06 22:46:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:03,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:03,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:03,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129050723] [2023-11-06 22:46:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:03,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:03,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:03,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:46:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:04,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:46:04,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 2373 proven. 156 refuted. 0 times theorem prover too weak. 5535 trivial. 0 not checked. [2023-11-06 22:46:06,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 33 proven. 156 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-06 22:46:06,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722068663] [2023-11-06 22:46:06,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129050723] [2023-11-06 22:46:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129050723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:06,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:46:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:46:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221367770] [2023-11-06 22:46:06,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:46:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:46:06,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:46:06,894 INFO L87 Difference]: Start difference. First operand 6792 states and 10901 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-11-06 22:46:09,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:46:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:12,774 INFO L93 Difference]: Finished difference Result 18165 states and 29295 transitions. [2023-11-06 22:46:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:46:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) Word has length 447 [2023-11-06 22:46:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:12,812 INFO L225 Difference]: With dead ends: 18165 [2023-11-06 22:46:12,812 INFO L226 Difference]: Without dead ends: 11533 [2023-11-06 22:46:12,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:46:12,827 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 2926 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2988 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:12,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2988 Valid, 3439 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-06 22:46:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11533 states. [2023-11-06 22:46:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11533 to 6757. [2023-11-06 22:46:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6036 states have (on average 1.5745526838966202) internal successors, (9504), 6036 states have internal predecessors, (9504), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 640 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:46:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 10784 transitions. [2023-11-06 22:46:13,714 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 10784 transitions. Word has length 447 [2023-11-06 22:46:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:13,715 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 10784 transitions. [2023-11-06 22:46:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-11-06 22:46:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 10784 transitions. [2023-11-06 22:46:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-11-06 22:46:13,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:13,728 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:13,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:46:13,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:13,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2049482111, now seen corresponding path program 1 times [2023-11-06 22:46:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:13,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443907585] [2023-11-06 22:46:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:14,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:14,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170258538] [2023-11-06 22:46:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:14,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:14,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:14,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:46:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:14,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:46:14,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:46:15,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443907585] [2023-11-06 22:46:15,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:15,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170258538] [2023-11-06 22:46:15,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170258538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:15,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:15,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:46:15,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312457439] [2023-11-06 22:46:15,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:15,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:46:15,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:46:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:15,439 INFO L87 Difference]: Start difference. First operand 6757 states and 10784 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:46:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:17,754 INFO L93 Difference]: Finished difference Result 23057 states and 36946 transitions. [2023-11-06 22:46:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:46:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 447 [2023-11-06 22:46:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:17,805 INFO L225 Difference]: With dead ends: 23057 [2023-11-06 22:46:17,805 INFO L226 Difference]: Without dead ends: 16460 [2023-11-06 22:46:17,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:46:17,817 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 1050 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:17,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 2884 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:46:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2023-11-06 22:46:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 6757. [2023-11-06 22:46:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6036 states have (on average 1.574387011265739) internal successors, (9503), 6036 states have internal predecessors, (9503), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 640 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:46:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 10783 transitions. [2023-11-06 22:46:18,664 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 10783 transitions. Word has length 447 [2023-11-06 22:46:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:18,666 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 10783 transitions. [2023-11-06 22:46:18,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:46:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 10783 transitions. [2023-11-06 22:46:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-11-06 22:46:18,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:18,679 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:18,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:46:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:46:18,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:18,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1972581313, now seen corresponding path program 1 times [2023-11-06 22:46:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318435558] [2023-11-06 22:46:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:19,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013733587] [2023-11-06 22:46:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:19,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:19,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:19,026 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:19,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:46:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:19,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:46:19,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:46:20,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318435558] [2023-11-06 22:46:20,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013733587] [2023-11-06 22:46:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013733587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:20,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:20,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:20,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153728274] [2023-11-06 22:46:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:20,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:20,285 INFO L87 Difference]: Start difference. First operand 6757 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:46:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:21,327 INFO L93 Difference]: Finished difference Result 14947 states and 23913 transitions. [2023-11-06 22:46:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 447 [2023-11-06 22:46:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:21,367 INFO L225 Difference]: With dead ends: 14947 [2023-11-06 22:46:21,367 INFO L226 Difference]: Without dead ends: 12820 [2023-11-06 22:46:21,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:21,374 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 236 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:21,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1099 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:46:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12820 states. [2023-11-06 22:46:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12820 to 6757. [2023-11-06 22:46:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6036 states have (on average 1.574387011265739) internal successors, (9503), 6036 states have internal predecessors, (9503), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 640 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:46:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 10783 transitions. [2023-11-06 22:46:22,244 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 10783 transitions. Word has length 447 [2023-11-06 22:46:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:22,245 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 10783 transitions. [2023-11-06 22:46:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:46:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 10783 transitions. [2023-11-06 22:46:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-06 22:46:22,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:22,255 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:22,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:46:22,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:22,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 578838968, now seen corresponding path program 1 times [2023-11-06 22:46:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553070254] [2023-11-06 22:46:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:22,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57891284] [2023-11-06 22:46:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:22,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:22,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:22,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:46:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:23,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:46:23,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4989 proven. 243 refuted. 0 times theorem prover too weak. 2832 trivial. 0 not checked. [2023-11-06 22:46:25,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 129 proven. 246 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-06 22:46:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553070254] [2023-11-06 22:46:25,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:25,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57891284] [2023-11-06 22:46:25,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57891284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:25,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:46:25,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2023-11-06 22:46:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144643311] [2023-11-06 22:46:25,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:46:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:46:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:46:25,930 INFO L87 Difference]: Start difference. First operand 6757 states and 10783 transitions. Second operand has 21 states, 20 states have (on average 12.1) internal successors, (242), 21 states have internal predecessors, (242), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) [2023-11-06 22:46:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:34,587 INFO L93 Difference]: Finished difference Result 21033 states and 33689 transitions. [2023-11-06 22:46:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:46:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 12.1) internal successors, (242), 21 states have internal predecessors, (242), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) Word has length 448 [2023-11-06 22:46:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:34,625 INFO L225 Difference]: With dead ends: 21033 [2023-11-06 22:46:34,626 INFO L226 Difference]: Without dead ends: 16781 [2023-11-06 22:46:34,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=1281, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:46:34,639 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 2620 mSDsluCounter, 2694 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2642 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:34,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2642 Valid, 3083 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-06 22:46:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16781 states. [2023-11-06 22:46:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16781 to 8324. [2023-11-06 22:46:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8324 states, 7603 states have (on average 1.591871629619887) internal successors, (12103), 7603 states have internal predecessors, (12103), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 640 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-06 22:46:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8324 states to 8324 states and 13383 transitions. [2023-11-06 22:46:35,758 INFO L78 Accepts]: Start accepts. Automaton has 8324 states and 13383 transitions. Word has length 448 [2023-11-06 22:46:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:35,759 INFO L495 AbstractCegarLoop]: Abstraction has 8324 states and 13383 transitions. [2023-11-06 22:46:35,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 12.1) internal successors, (242), 21 states have internal predecessors, (242), 6 states have call successors, (116), 3 states have call predecessors, (116), 7 states have return successors, (117), 5 states have call predecessors, (117), 6 states have call successors, (117) [2023-11-06 22:46:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 8324 states and 13383 transitions. [2023-11-06 22:46:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-06 22:46:35,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:35,769 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:35,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:35,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:46:35,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:35,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1332203590, now seen corresponding path program 1 times [2023-11-06 22:46:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:35,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274936143] [2023-11-06 22:46:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:36,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:36,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49288002] [2023-11-06 22:46:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:36,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:36,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:46:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:36,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:46:36,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4989 proven. 243 refuted. 0 times theorem prover too weak. 2832 trivial. 0 not checked. [2023-11-06 22:46:39,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 129 proven. 246 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-06 22:46:40,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:40,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274936143] [2023-11-06 22:46:40,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:40,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49288002] [2023-11-06 22:46:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49288002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:40,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:46:40,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-11-06 22:46:40,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396241558] [2023-11-06 22:46:40,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:40,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:46:40,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:46:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:46:40,101 INFO L87 Difference]: Start difference. First operand 8324 states and 13383 transitions. Second operand has 19 states, 18 states have (on average 14.277777777777779) internal successors, (257), 19 states have internal predecessors, (257), 7 states have call successors, (128), 4 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 7 states have call successors, (128) [2023-11-06 22:46:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:53,262 INFO L93 Difference]: Finished difference Result 41305 states and 66061 transitions. [2023-11-06 22:46:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:46:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 14.277777777777779) internal successors, (257), 19 states have internal predecessors, (257), 7 states have call successors, (128), 4 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 7 states have call successors, (128) Word has length 448 [2023-11-06 22:46:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:53,330 INFO L225 Difference]: With dead ends: 41305 [2023-11-06 22:46:53,331 INFO L226 Difference]: Without dead ends: 35432 [2023-11-06 22:46:53,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=762, Invalid=1788, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:46:53,346 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 4161 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4204 SdHoareTripleChecker+Valid, 5123 SdHoareTripleChecker+Invalid, 4854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:53,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4204 Valid, 5123 Invalid, 4854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [888 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-11-06 22:46:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35432 states. [2023-11-06 22:46:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35432 to 12963. [2023-11-06 22:46:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12963 states, 11594 states have (on average 1.5733137829912023) internal successors, (18241), 11594 states have internal predecessors, (18241), 1216 states have call successors, (1216), 152 states have call predecessors, (1216), 152 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-11-06 22:46:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 20673 transitions. [2023-11-06 22:46:55,362 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 20673 transitions. Word has length 448 [2023-11-06 22:46:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:46:55,363 INFO L495 AbstractCegarLoop]: Abstraction has 12963 states and 20673 transitions. [2023-11-06 22:46:55,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 14.277777777777779) internal successors, (257), 19 states have internal predecessors, (257), 7 states have call successors, (128), 4 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 7 states have call successors, (128) [2023-11-06 22:46:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 20673 transitions. [2023-11-06 22:46:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-11-06 22:46:55,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:46:55,372 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:55,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:55,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:46:55,583 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:46:55,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1731142916, now seen corresponding path program 1 times [2023-11-06 22:46:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:55,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620418529] [2023-11-06 22:46:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:55,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:55,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:46:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158151793] [2023-11-06 22:46:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:55,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:55,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:46:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:56,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:46:56,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-06 22:46:57,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:57,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:57,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620418529] [2023-11-06 22:46:57,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:46:57,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158151793] [2023-11-06 22:46:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158151793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:57,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:46:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812149846] [2023-11-06 22:46:57,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:57,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:57,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:46:57,058 INFO L87 Difference]: Start difference. First operand 12963 states and 20673 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:46:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:46:58,679 INFO L93 Difference]: Finished difference Result 27402 states and 43736 transitions. [2023-11-06 22:46:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 449 [2023-11-06 22:46:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:46:58,709 INFO L225 Difference]: With dead ends: 27402 [2023-11-06 22:46:58,710 INFO L226 Difference]: Without dead ends: 14581 [2023-11-06 22:46:58,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:58,729 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 433 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:46:58,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1305 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:46:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14581 states. [2023-11-06 22:47:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14581 to 14357. [2023-11-06 22:47:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14357 states, 12988 states have (on average 1.5760702186633815) internal successors, (20470), 12988 states have internal predecessors, (20470), 1216 states have call successors, (1216), 152 states have call predecessors, (1216), 152 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-11-06 22:47:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14357 states to 14357 states and 22902 transitions. [2023-11-06 22:47:00,211 INFO L78 Accepts]: Start accepts. Automaton has 14357 states and 22902 transitions. Word has length 449 [2023-11-06 22:47:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:47:00,212 INFO L495 AbstractCegarLoop]: Abstraction has 14357 states and 22902 transitions. [2023-11-06 22:47:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-06 22:47:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14357 states and 22902 transitions. [2023-11-06 22:47:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-06 22:47:00,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:47:00,218 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:00,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:00,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:47:00,421 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:47:00,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1052550964, now seen corresponding path program 1 times [2023-11-06 22:47:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:00,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802987720] [2023-11-06 22:47:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:00,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:00,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:47:00,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135040653] [2023-11-06 22:47:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:00,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:00,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:00,517 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:00,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:47:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:01,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:47:01,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 1682 proven. 351 refuted. 0 times theorem prover too weak. 6031 trivial. 0 not checked. [2023-11-06 22:47:03,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 21 proven. 354 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-06 22:47:04,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802987720] [2023-11-06 22:47:04,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:47:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135040653] [2023-11-06 22:47:04,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135040653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:04,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:04,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:47:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700350460] [2023-11-06 22:47:04,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:47:04,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:47:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:47:04,052 INFO L87 Difference]: Start difference. First operand 14357 states and 22902 transitions. Second operand has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (127), 3 states have call predecessors, (127), 7 states have return successors, (128), 4 states have call predecessors, (128), 5 states have call successors, (128) [2023-11-06 22:47:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:47:08,265 INFO L93 Difference]: Finished difference Result 50921 states and 81662 transitions. [2023-11-06 22:47:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:47:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (127), 3 states have call predecessors, (127), 7 states have return successors, (128), 4 states have call predecessors, (128), 5 states have call successors, (128) Word has length 450 [2023-11-06 22:47:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:47:08,319 INFO L225 Difference]: With dead ends: 50921 [2023-11-06 22:47:08,319 INFO L226 Difference]: Without dead ends: 36710 [2023-11-06 22:47:08,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:47:08,331 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1221 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:47:08,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1269 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:47:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36710 states. [2023-11-06 22:47:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36710 to 32250. [2023-11-06 22:47:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32250 states, 30843 states have (on average 1.5870051551405506) internal successors, (48948), 30843 states have internal predecessors, (48948), 1216 states have call successors, (1216), 190 states have call predecessors, (1216), 190 states have return successors, (1216), 1216 states have call predecessors, (1216), 1216 states have call successors, (1216) [2023-11-06 22:47:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32250 states to 32250 states and 51380 transitions. [2023-11-06 22:47:10,688 INFO L78 Accepts]: Start accepts. Automaton has 32250 states and 51380 transitions. Word has length 450 [2023-11-06 22:47:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:47:10,689 INFO L495 AbstractCegarLoop]: Abstraction has 32250 states and 51380 transitions. [2023-11-06 22:47:10,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (127), 3 states have call predecessors, (127), 7 states have return successors, (128), 4 states have call predecessors, (128), 5 states have call successors, (128) [2023-11-06 22:47:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 32250 states and 51380 transitions. [2023-11-06 22:47:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-06 22:47:10,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:47:10,698 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:47:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:47:10,909 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:47:10,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash 514206986, now seen corresponding path program 1 times [2023-11-06 22:47:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764258385] [2023-11-06 22:47:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:10,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:47:10,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262207941] [2023-11-06 22:47:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:10,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:10,990 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:11,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:47:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:11,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:47:11,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4317 proven. 447 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2023-11-06 22:47:15,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 279 proven. 279 refuted. 0 times theorem prover too weak. 7506 trivial. 0 not checked. [2023-11-06 22:47:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764258385] [2023-11-06 22:47:23,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:47:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262207941] [2023-11-06 22:47:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262207941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:23,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:47:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2023-11-06 22:47:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114327319] [2023-11-06 22:47:23,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:47:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:47:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1083, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:47:23,880 INFO L87 Difference]: Start difference. First operand 32250 states and 51380 transitions. Second operand has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 8 states have call successors, (127), 5 states have call predecessors, (127), 11 states have return successors, (128), 7 states have call predecessors, (128), 8 states have call successors, (128) [2023-11-06 22:48:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:08,449 INFO L93 Difference]: Finished difference Result 229582 states and 359605 transitions. [2023-11-06 22:48:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-11-06 22:48:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 8 states have call successors, (127), 5 states have call predecessors, (127), 11 states have return successors, (128), 7 states have call predecessors, (128), 8 states have call successors, (128) Word has length 450 [2023-11-06 22:48:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:08,955 INFO L225 Difference]: With dead ends: 229582 [2023-11-06 22:48:08,955 INFO L226 Difference]: Without dead ends: 197942 [2023-11-06 22:48:09,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19387 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=8984, Invalid=40522, Unknown=0, NotChecked=0, Total=49506 [2023-11-06 22:48:09,025 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 11306 mSDsluCounter, 5965 mSDsCounter, 0 mSdLazyCounter, 6176 mSolverCounterSat, 2799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11306 SdHoareTripleChecker+Valid, 6459 SdHoareTripleChecker+Invalid, 8975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2799 IncrementalHoareTripleChecker+Valid, 6176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:09,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11306 Valid, 6459 Invalid, 8975 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2799 Valid, 6176 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2023-11-06 22:48:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197942 states. [2023-11-06 22:48:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197942 to 97171. [2023-11-06 22:48:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97171 states, 93978 states have (on average 1.5701972802145183) internal successors, (147564), 94014 states have internal predecessors, (147564), 2566 states have call successors, (2566), 626 states have call predecessors, (2566), 626 states have return successors, (2566), 2530 states have call predecessors, (2566), 2566 states have call successors, (2566) [2023-11-06 22:48:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97171 states to 97171 states and 152696 transitions. [2023-11-06 22:48:15,921 INFO L78 Accepts]: Start accepts. Automaton has 97171 states and 152696 transitions. Word has length 450 [2023-11-06 22:48:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:48:15,922 INFO L495 AbstractCegarLoop]: Abstraction has 97171 states and 152696 transitions. [2023-11-06 22:48:15,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.918918918918919) internal successors, (256), 36 states have internal predecessors, (256), 8 states have call successors, (127), 5 states have call predecessors, (127), 11 states have return successors, (128), 7 states have call predecessors, (128), 8 states have call successors, (128) [2023-11-06 22:48:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 97171 states and 152696 transitions. [2023-11-06 22:48:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-06 22:48:15,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:15,936 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:15,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:16,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:48:16,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:16,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:16,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1339343998, now seen corresponding path program 1 times [2023-11-06 22:48:16,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058611253] [2023-11-06 22:48:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:16,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:48:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51337681] [2023-11-06 22:48:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:16,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:16,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2997e91-fe64-4140-bb02-a040dcb64e9a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:48:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:16,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:48:16,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4121 proven. 174 refuted. 0 times theorem prover too weak. 3769 trivial. 0 not checked. [2023-11-06 22:48:18,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 198 proven. 177 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-06 22:48:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058611253] [2023-11-06 22:48:19,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:48:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51337681] [2023-11-06 22:48:19,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51337681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:19,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:48:19,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2023-11-06 22:48:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050847961] [2023-11-06 22:48:19,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:19,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:48:19,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:48:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:48:19,898 INFO L87 Difference]: Start difference. First operand 97171 states and 152696 transitions. Second operand has 21 states, 19 states have (on average 13.368421052631579) internal successors, (254), 19 states have internal predecessors, (254), 7 states have call successors, (128), 4 states have call predecessors, (128), 7 states have return successors, (128), 6 states have call predecessors, (128), 7 states have call successors, (128) [2023-11-06 22:48:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:48:37,399 INFO L93 Difference]: Finished difference Result 365863 states and 579168 transitions. [2023-11-06 22:48:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:48:37,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 13.368421052631579) internal successors, (254), 19 states have internal predecessors, (254), 7 states have call successors, (128), 4 states have call predecessors, (128), 7 states have return successors, (128), 6 states have call predecessors, (128), 7 states have call successors, (128) Word has length 450 [2023-11-06 22:48:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:48:38,008 INFO L225 Difference]: With dead ends: 365863 [2023-11-06 22:48:38,008 INFO L226 Difference]: Without dead ends: 273372 [2023-11-06 22:48:38,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 882 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:48:38,068 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 2632 mSDsluCounter, 3516 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 4109 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:48:38,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 4109 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 22:48:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273372 states.