./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu --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 c469b75cc3acec0afb4777ccbc446a0a894bfe2960322167d3fdb024eb8caf56 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:36,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:36,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:36,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:36,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:36,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:36,296 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:36,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:36,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:36,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:36,305 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:36,306 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:36,306 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:36,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:36,309 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:36,309 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:36,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:36,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:36,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:36,311 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:36,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:36,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:36,313 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:36,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:36,314 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:36,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:36,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:36,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:36,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:36,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:36,318 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:36,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:36,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:36,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:36,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:36,320 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:36,320 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:36,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:36,321 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:36,321 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_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c469b75cc3acec0afb4777ccbc446a0a894bfe2960322167d3fdb024eb8caf56 [2023-11-19 08:00:36,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:36,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:36,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:36,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:36,681 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:36,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i [2023-11-19 08:00:40,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:40,393 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:40,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i [2023-11-19 08:00:40,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/data/c0b76dfd9/c63d1b1243ab49c8963941e784f086e5/FLAG97aeb64ea [2023-11-19 08:00:40,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/data/c0b76dfd9/c63d1b1243ab49c8963941e784f086e5 [2023-11-19 08:00:40,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:40,446 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:40,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:40,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:40,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:40,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599458e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40, skipping insertion in model container [2023-11-19 08:00:40,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:40,674 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_59ca5675-c24c-4787-94e6-9386dd839ca6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i[916,929] [2023-11-19 08:00:40,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:40,777 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:40,790 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_59ca5675-c24c-4787-94e6-9386dd839ca6/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-92.i[916,929] [2023-11-19 08:00:40,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:40,884 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:40,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40 WrapperNode [2023-11-19 08:00:40,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:40,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:40,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:40,887 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:40,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,917 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,990 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 302 [2023-11-19 08:00:40,990 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:40,991 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:40,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:40,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:41,002 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,008 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:41,059 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:41,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:41,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:41,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:41,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:41,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:41,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:00:41,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:00:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:41,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:41,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:41,269 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:41,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:41,998 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:42,010 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:42,011 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:00:42,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:42 BoogieIcfgContainer [2023-11-19 08:00:42,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:42,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:42,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:42,022 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:42,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:40" (1/3) ... [2023-11-19 08:00:42,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11569fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:42, skipping insertion in model container [2023-11-19 08:00:42,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (2/3) ... [2023-11-19 08:00:42,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11569fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:42, skipping insertion in model container [2023-11-19 08:00:42,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:42" (3/3) ... [2023-11-19 08:00:42,026 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-92.i [2023-11-19 08:00:42,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:42,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:00:42,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:42,110 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;@4abb4cc5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:42,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:00:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 93 states have internal predecessors, (143), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 08:00:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 08:00:42,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:42,135 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:42,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:42,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash -957850683, now seen corresponding path program 1 times [2023-11-19 08:00:42,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240965199] [2023-11-19 08:00:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:42,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240965199] [2023-11-19 08:00:42,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:00:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349060063] [2023-11-19 08:00:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:42,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:42,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:00:42,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-19 08:00:42,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:42,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349060063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:42,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:42,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088884774] [2023-11-19 08:00:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:42,786 INFO L87 Difference]: Start difference. First operand has 117 states, 92 states have (on average 1.5543478260869565) internal successors, (143), 93 states have internal predecessors, (143), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 08:00:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:42,864 INFO L93 Difference]: Finished difference Result 227 states and 390 transitions. [2023-11-19 08:00:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 159 [2023-11-19 08:00:42,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:42,881 INFO L225 Difference]: With dead ends: 227 [2023-11-19 08:00:42,883 INFO L226 Difference]: Without dead ends: 113 [2023-11-19 08:00:42,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:42,891 INFO L413 NwaCegarLoop]: 180 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, 180 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 [2023-11-19 08:00:42,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-19 08:00:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-19 08:00:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.5280898876404494) internal successors, (136), 89 states have internal predecessors, (136), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 08:00:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2023-11-19 08:00:42,965 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 159 [2023-11-19 08:00:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:42,966 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2023-11-19 08:00:42,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 08:00:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2023-11-19 08:00:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 08:00:42,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:42,971 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:42,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:43,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:00:43,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:43,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1501464887, now seen corresponding path program 1 times [2023-11-19 08:00:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313888835] [2023-11-19 08:00:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:43,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579904496] [2023-11-19 08:00:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:43,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:43,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:43,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:00:43,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 471 proven. 36 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-19 08:00:44,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:46,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313888835] [2023-11-19 08:00:46,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579904496] [2023-11-19 08:00:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579904496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:46,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:46,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-19 08:00:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381048638] [2023-11-19 08:00:46,271 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:00:46,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:00:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:00:46,276 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 08:00:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:46,888 INFO L93 Difference]: Finished difference Result 449 states and 716 transitions. [2023-11-19 08:00:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:00:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 159 [2023-11-19 08:00:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:46,900 INFO L225 Difference]: With dead ends: 449 [2023-11-19 08:00:46,900 INFO L226 Difference]: Without dead ends: 339 [2023-11-19 08:00:46,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:00:46,904 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 447 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:46,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 719 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:00:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-19 08:00:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2023-11-19 08:00:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.5229007633587786) internal successors, (399), 262 states have internal predecessors, (399), 66 states have call successors, (66), 4 states have call predecessors, (66), 4 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 08:00:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 531 transitions. [2023-11-19 08:00:47,018 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 531 transitions. Word has length 159 [2023-11-19 08:00:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:47,021 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 531 transitions. [2023-11-19 08:00:47,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 08:00:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 531 transitions. [2023-11-19 08:00:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 08:00:47,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:47,035 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:47,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:47,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:47,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1104558667, now seen corresponding path program 1 times [2023-11-19 08:00:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178148205] [2023-11-19 08:00:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:47,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:47,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221393498] [2023-11-19 08:00:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:47,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:47,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:47,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:47,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 243 proven. 54 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2023-11-19 08:00:47,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-11-19 08:00:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178148205] [2023-11-19 08:00:47,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221393498] [2023-11-19 08:00:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221393498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:47,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:47,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 08:00:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929359010] [2023-11-19 08:00:47,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:47,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:00:47,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:47,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:00:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:00:47,959 INFO L87 Difference]: Start difference. First operand 333 states and 531 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-11-19 08:00:48,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:48,398 INFO L93 Difference]: Finished difference Result 1035 states and 1617 transitions. [2023-11-19 08:00:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:00:48,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 159 [2023-11-19 08:00:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:48,406 INFO L225 Difference]: With dead ends: 1035 [2023-11-19 08:00:48,407 INFO L226 Difference]: Without dead ends: 705 [2023-11-19 08:00:48,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:00:48,410 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 825 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:48,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 513 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:00:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-11-19 08:00:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 679. [2023-11-19 08:00:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 532 states have (on average 1.481203007518797) internal successors, (788), 532 states have internal predecessors, (788), 132 states have call successors, (132), 14 states have call predecessors, (132), 14 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 08:00:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1052 transitions. [2023-11-19 08:00:48,494 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1052 transitions. Word has length 159 [2023-11-19 08:00:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:48,495 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1052 transitions. [2023-11-19 08:00:48,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (40), 2 states have call predecessors, (40), 4 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2023-11-19 08:00:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1052 transitions. [2023-11-19 08:00:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-19 08:00:48,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:48,500 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:48,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:48,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:48,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1527260493, now seen corresponding path program 1 times [2023-11-19 08:00:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914742670] [2023-11-19 08:00:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:48,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580123553] [2023-11-19 08:00:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:48,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:48,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59ca5675-c24c-4787-94e6-9386dd839ca6/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:48,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:00:48,981 INFO L285 TraceCheckSpWp]: Computing forward predicates...