./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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 3afd69b93f97a26a35dc01482a1f1a3fd2a20e17dd6f40d85ef6c5a9b20259e7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:43,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:43,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:43,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:43,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:43,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:43,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:43,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:43,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:43,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:43,776 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:43,776 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:43,777 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:43,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:43,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:43,779 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:43,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:43,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:43,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:43,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:43,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:43,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:43,784 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:43,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:43,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:43,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:43,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:43,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:43,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:43,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:43,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:43,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:43,791 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:43,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:43,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:43,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:43,794 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:43,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:43,795 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:43,796 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_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3afd69b93f97a26a35dc01482a1f1a3fd2a20e17dd6f40d85ef6c5a9b20259e7 [2023-11-12 02:21:44,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:44,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:44,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:44,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:44,132 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:44,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i [2023-11-12 02:21:47,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:48,292 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:48,293 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i [2023-11-12 02:21:48,310 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/data/a5d09b5fb/86ca3c68dc5d4cb39fa83b1c15943d68/FLAG6a52ed88c [2023-11-12 02:21:48,326 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/data/a5d09b5fb/86ca3c68dc5d4cb39fa83b1c15943d68 [2023-11-12 02:21:48,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:48,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:48,334 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:48,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:48,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:48,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:48" (1/1) ... [2023-11-12 02:21:48,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb3b4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:48, skipping insertion in model container [2023-11-12 02:21:48,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:48" (1/1) ... [2023-11-12 02:21:48,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:48,631 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_6db1ad7f-62fc-449f-964f-10709b9b6882/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i[916,929] [2023-11-12 02:21:48,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:48,849 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:48,865 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_6db1ad7f-62fc-449f-964f-10709b9b6882/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-80.i[916,929] [2023-11-12 02:21:49,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:49,027 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:49,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49 WrapperNode [2023-11-12 02:21:49,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:49,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:49,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:49,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:49,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,151 INFO L138 Inliner]: procedures = 26, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 381 [2023-11-12 02:21:49,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:49,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:49,153 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:49,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:49,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:49,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:49,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:49,250 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:49,251 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (1/1) ... [2023-11-12 02:21:49,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:49,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:49,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:49,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:21:49,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:21:49,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:49,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:49,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:49,510 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:49,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:50,371 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:50,381 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:50,382 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:21:50,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:50 BoogieIcfgContainer [2023-11-12 02:21:50,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:50,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:50,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:50,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:50,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:48" (1/3) ... [2023-11-12 02:21:50,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7ceb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:50, skipping insertion in model container [2023-11-12 02:21:50,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:49" (2/3) ... [2023-11-12 02:21:50,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7ceb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:50, skipping insertion in model container [2023-11-12 02:21:50,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:50" (3/3) ... [2023-11-12 02:21:50,397 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-80.i [2023-11-12 02:21:50,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:50,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:50,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:50,487 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=LoopHeads, 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;@3f5d6896, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:50,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:21:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 115 states have internal predecessors, (170), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-12 02:21:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-12 02:21:50,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:50,529 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:50,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:50,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1316580108, now seen corresponding path program 1 times [2023-11-12 02:21:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888629090] [2023-11-12 02:21:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:50,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888629090] [2023-11-12 02:21:50,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:21:50,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194128111] [2023-11-12 02:21:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:50,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:50,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:51,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:21:51,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2023-11-12 02:21:51,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194128111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:51,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:51,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903574368] [2023-11-12 02:21:51,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:21:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:21:51,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:51,546 INFO L87 Difference]: Start difference. First operand has 166 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 115 states have internal predecessors, (170), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 38.0) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-12 02:21:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:51,620 INFO L93 Difference]: Finished difference Result 325 states and 579 transitions. [2023-11-12 02:21:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:21:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.0) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) Word has length 316 [2023-11-12 02:21:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:51,635 INFO L225 Difference]: With dead ends: 325 [2023-11-12 02:21:51,635 INFO L226 Difference]: Without dead ends: 162 [2023-11-12 02:21:51,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:51,646 INFO L413 NwaCegarLoop]: 260 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, 260 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 [2023-11-12 02:21:51,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-12 02:21:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-12 02:21:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 111 states have (on average 1.4594594594594594) internal successors, (162), 111 states have internal predecessors, (162), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-12 02:21:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 260 transitions. [2023-11-12 02:21:51,725 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 260 transitions. Word has length 316 [2023-11-12 02:21:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:51,726 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 260 transitions. [2023-11-12 02:21:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.0) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 2 states have call successors, (49) [2023-11-12 02:21:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 260 transitions. [2023-11-12 02:21:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-12 02:21:51,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:51,738 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:51,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:21:51,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:21:51,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:51,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash -399226882, now seen corresponding path program 1 times [2023-11-12 02:21:51,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:51,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942611897] [2023-11-12 02:21:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:52,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:52,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632030269] [2023-11-12 02:21:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:52,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:52,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:52,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:52,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:52,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-12 02:21:53,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:53,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:53,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942611897] [2023-11-12 02:21:53,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632030269] [2023-11-12 02:21:53,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632030269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:53,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:53,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:21:53,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546781334] [2023-11-12 02:21:53,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:53,280 INFO L87 Difference]: Start difference. First operand 162 states and 260 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:53,742 INFO L93 Difference]: Finished difference Result 517 states and 830 transitions. [2023-11-12 02:21:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 316 [2023-11-12 02:21:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:53,757 INFO L225 Difference]: With dead ends: 517 [2023-11-12 02:21:53,758 INFO L226 Difference]: Without dead ends: 358 [2023-11-12 02:21:53,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:53,762 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 336 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:53,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 755 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:21:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-12 02:21:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 318. [2023-11-12 02:21:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 217 states have (on average 1.4608294930875576) internal successors, (317), 217 states have internal predecessors, (317), 98 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-12 02:21:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 513 transitions. [2023-11-12 02:21:53,845 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 513 transitions. Word has length 316 [2023-11-12 02:21:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:53,848 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 513 transitions. [2023-11-12 02:21:53,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 513 transitions. [2023-11-12 02:21:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-11-12 02:21:53,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:53,859 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:53,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:54,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:54,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:54,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2030972527, now seen corresponding path program 1 times [2023-11-12 02:21:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:54,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394602917] [2023-11-12 02:21:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:54,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:54,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861951859] [2023-11-12 02:21:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:54,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:21:54,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-12 02:21:54,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:54,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:54,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394602917] [2023-11-12 02:21:54,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:54,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861951859] [2023-11-12 02:21:54,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861951859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:54,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:21:54,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992707664] [2023-11-12 02:21:54,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:54,747 INFO L87 Difference]: Start difference. First operand 318 states and 513 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:55,054 INFO L93 Difference]: Finished difference Result 762 states and 1224 transitions. [2023-11-12 02:21:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:55,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 317 [2023-11-12 02:21:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:55,062 INFO L225 Difference]: With dead ends: 762 [2023-11-12 02:21:55,062 INFO L226 Difference]: Without dead ends: 447 [2023-11-12 02:21:55,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:55,065 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 80 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:55,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 531 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:21:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-12 02:21:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2023-11-12 02:21:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 336 states have (on average 1.4910714285714286) internal successors, (501), 338 states have internal predecessors, (501), 102 states have call successors, (102), 4 states have call predecessors, (102), 4 states have return successors, (102), 100 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-12 02:21:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 705 transitions. [2023-11-12 02:21:55,150 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 705 transitions. Word has length 317 [2023-11-12 02:21:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:55,152 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 705 transitions. [2023-11-12 02:21:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 705 transitions. [2023-11-12 02:21:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2023-11-12 02:21:55,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:55,159 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:55,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:55,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:55,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 725594614, now seen corresponding path program 1 times [2023-11-12 02:21:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848985735] [2023-11-12 02:21:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:55,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:55,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801357315] [2023-11-12 02:21:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:55,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:55,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:21:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:55,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:21:55,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-12 02:21:56,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848985735] [2023-11-12 02:21:56,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801357315] [2023-11-12 02:21:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801357315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:56,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:56,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:21:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730762110] [2023-11-12 02:21:56,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:56,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:21:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:21:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:21:56,529 INFO L87 Difference]: Start difference. First operand 443 states and 705 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:57,718 INFO L93 Difference]: Finished difference Result 1843 states and 2931 transitions. [2023-11-12 02:21:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:21:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 318 [2023-11-12 02:21:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:57,734 INFO L225 Difference]: With dead ends: 1843 [2023-11-12 02:21:57,735 INFO L226 Difference]: Without dead ends: 1403 [2023-11-12 02:21:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:21:57,739 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 653 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:57,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1384 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:21:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2023-11-12 02:21:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 956. [2023-11-12 02:21:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 747 states have (on average 1.5127175368139223) internal successors, (1130), 749 states have internal predecessors, (1130), 200 states have call successors, (200), 8 states have call predecessors, (200), 8 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2023-11-12 02:21:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1530 transitions. [2023-11-12 02:21:57,917 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1530 transitions. Word has length 318 [2023-11-12 02:21:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:57,918 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1530 transitions. [2023-11-12 02:21:57,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1530 transitions. [2023-11-12 02:21:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-12 02:21:57,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:57,925 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:57,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:58,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:58,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:58,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -216101178, now seen corresponding path program 1 times [2023-11-12 02:21:58,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:58,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786360510] [2023-11-12 02:21:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:58,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:58,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426629291] [2023-11-12 02:21:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:58,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:58,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:21:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:58,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:58,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2023-11-12 02:21:59,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:59,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786360510] [2023-11-12 02:21:59,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:59,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426629291] [2023-11-12 02:21:59,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426629291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:59,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:59,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:21:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940519446] [2023-11-12 02:21:59,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:59,689 INFO L87 Difference]: Start difference. First operand 956 states and 1530 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:21:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:59,810 INFO L93 Difference]: Finished difference Result 2424 states and 3883 transitions. [2023-11-12 02:21:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 319 [2023-11-12 02:21:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:59,825 INFO L225 Difference]: With dead ends: 2424 [2023-11-12 02:21:59,825 INFO L226 Difference]: Without dead ends: 1471 [2023-11-12 02:21:59,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:59,830 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 228 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:59,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 504 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-12 02:22:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1469. [2023-11-12 02:22:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1158 states have (on average 1.512089810017271) internal successors, (1751), 1160 states have internal predecessors, (1751), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 296 states have call predecessors, (298), 298 states have call successors, (298) [2023-11-12 02:22:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2347 transitions. [2023-11-12 02:22:00,023 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2347 transitions. Word has length 319 [2023-11-12 02:22:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:00,024 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 2347 transitions. [2023-11-12 02:22:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 1 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2023-11-12 02:22:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2347 transitions. [2023-11-12 02:22:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-12 02:22:00,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:00,029 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:00,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:00,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:00,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:00,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash 58658436, now seen corresponding path program 1 times [2023-11-12 02:22:00,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:00,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91290887] [2023-11-12 02:22:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:00,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117708457] [2023-11-12 02:22:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:00,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:00,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:00,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:00,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:00,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:22:00,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1588 proven. 114 refuted. 0 times theorem prover too weak. 3002 trivial. 0 not checked. [2023-11-12 02:22:01,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 30 proven. 114 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-12 02:22:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:01,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91290887] [2023-11-12 02:22:01,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:01,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117708457] [2023-11-12 02:22:01,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117708457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:01,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:01,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-12 02:22:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755012510] [2023-11-12 02:22:01,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:01,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:22:01,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:22:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:22:01,545 INFO L87 Difference]: Start difference. First operand 1469 states and 2347 transitions. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-12 02:22:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:02,182 INFO L93 Difference]: Finished difference Result 2971 states and 4721 transitions. [2023-11-12 02:22:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:22:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 319 [2023-11-12 02:22:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:02,198 INFO L225 Difference]: With dead ends: 2971 [2023-11-12 02:22:02,198 INFO L226 Difference]: Without dead ends: 1505 [2023-11-12 02:22:02,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 628 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:22:02,207 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 270 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:02,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 575 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:22:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-12 02:22:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1493. [2023-11-12 02:22:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1176 states have (on average 1.4906462585034013) internal successors, (1753), 1178 states have internal predecessors, (1753), 298 states have call successors, (298), 18 states have call predecessors, (298), 18 states have return successors, (298), 296 states have call predecessors, (298), 298 states have call successors, (298) [2023-11-12 02:22:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2349 transitions. [2023-11-12 02:22:02,401 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2349 transitions. Word has length 319 [2023-11-12 02:22:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:02,402 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2349 transitions. [2023-11-12 02:22:02,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-12 02:22:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2349 transitions. [2023-11-12 02:22:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-12 02:22:02,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:02,407 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:02,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:22:02,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:02,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 81290690, now seen corresponding path program 1 times [2023-11-12 02:22:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:02,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111107989] [2023-11-12 02:22:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:02,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:02,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986361998] [2023-11-12 02:22:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:02,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:02,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:02,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:03,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:22:03,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 1541 proven. 48 refuted. 0 times theorem prover too weak. 3115 trivial. 0 not checked. [2023-11-12 02:22:03,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 117 proven. 27 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-12 02:22:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111107989] [2023-11-12 02:22:04,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986361998] [2023-11-12 02:22:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986361998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:04,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:04,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-12 02:22:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438540341] [2023-11-12 02:22:04,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:04,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:22:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:22:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:22:04,180 INFO L87 Difference]: Start difference. First operand 1493 states and 2349 transitions. Second operand has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (58), 3 states have call predecessors, (58), 5 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) [2023-11-12 02:22:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:05,860 INFO L93 Difference]: Finished difference Result 3567 states and 5488 transitions. [2023-11-12 02:22:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:22:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (58), 3 states have call predecessors, (58), 5 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) Word has length 319 [2023-11-12 02:22:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:05,885 INFO L225 Difference]: With dead ends: 3567 [2023-11-12 02:22:05,886 INFO L226 Difference]: Without dead ends: 2077 [2023-11-12 02:22:05,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:22:05,893 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 412 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:05,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1351 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:22:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2023-11-12 02:22:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2045. [2023-11-12 02:22:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 1464 states have (on average 1.3913934426229508) internal successors, (2037), 1472 states have internal predecessors, (2037), 532 states have call successors, (532), 48 states have call predecessors, (532), 48 states have return successors, (532), 524 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-12 02:22:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 3101 transitions. [2023-11-12 02:22:06,240 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 3101 transitions. Word has length 319 [2023-11-12 02:22:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:06,243 INFO L495 AbstractCegarLoop]: Abstraction has 2045 states and 3101 transitions. [2023-11-12 02:22:06,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.266666666666667) internal successors, (124), 14 states have internal predecessors, (124), 4 states have call successors, (58), 3 states have call predecessors, (58), 5 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) [2023-11-12 02:22:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 3101 transitions. [2023-11-12 02:22:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-12 02:22:06,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:06,248 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:06,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:06,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:06,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:06,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -582426410, now seen corresponding path program 1 times [2023-11-12 02:22:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549291895] [2023-11-12 02:22:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:06,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648003658] [2023-11-12 02:22:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:06,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:06,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:06,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:07,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:07,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 420 proven. 138 refuted. 0 times theorem prover too weak. 4146 trivial. 0 not checked. [2023-11-12 02:22:07,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 6 proven. 138 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2023-11-12 02:22:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549291895] [2023-11-12 02:22:07,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648003658] [2023-11-12 02:22:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648003658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:07,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:07,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:22:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587707753] [2023-11-12 02:22:07,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:22:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:22:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:07,999 INFO L87 Difference]: Start difference. First operand 2045 states and 3101 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-12 02:22:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:08,678 INFO L93 Difference]: Finished difference Result 3409 states and 5130 transitions. [2023-11-12 02:22:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) Word has length 319 [2023-11-12 02:22:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:08,691 INFO L225 Difference]: With dead ends: 3409 [2023-11-12 02:22:08,691 INFO L226 Difference]: Without dead ends: 1367 [2023-11-12 02:22:08,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 630 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:22:08,701 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 237 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:08,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 471 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:22:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2023-11-12 02:22:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1339. [2023-11-12 02:22:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 962 states have (on average 1.3742203742203742) internal successors, (1322), 963 states have internal predecessors, (1322), 333 states have call successors, (333), 43 states have call predecessors, (333), 43 states have return successors, (333), 332 states have call predecessors, (333), 333 states have call successors, (333) [2023-11-12 02:22:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1988 transitions. [2023-11-12 02:22:08,927 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1988 transitions. Word has length 319 [2023-11-12 02:22:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:08,928 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 1988 transitions. [2023-11-12 02:22:08,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (95), 2 states have call predecessors, (95), 4 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2023-11-12 02:22:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1988 transitions. [2023-11-12 02:22:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-12 02:22:08,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:08,933 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:08,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:09,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:09,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:09,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:09,143 INFO L85 PathProgramCache]: Analyzing trace with hash 715080858, now seen corresponding path program 1 times [2023-11-12 02:22:09,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:09,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911594023] [2023-11-12 02:22:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:09,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432357160] [2023-11-12 02:22:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:09,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:09,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:09,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db1ad7f-62fc-449f-964f-10709b9b6882/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:22:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:10,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:22:10,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 3468 proven. 345 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2023-11-12 02:22:12,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 315 proven. 375 refuted. 0 times theorem prover too weak. 4014 trivial. 0 not checked. [2023-11-12 02:22:20,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:20,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911594023] [2023-11-12 02:22:20,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:20,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432357160] [2023-11-12 02:22:20,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432357160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:20,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2023-11-12 02:22:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20882936] [2023-11-12 02:22:20,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-12 02:22:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-12 02:22:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:22:20,668 INFO L87 Difference]: Start difference. First operand 1339 states and 1988 transitions. Second operand has 42 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 11 states have call successors, (86), 6 states have call predecessors, (86), 15 states have return successors, (87), 11 states have call predecessors, (87), 11 states have call successors, (87)