./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.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_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/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_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/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_1821a952-345e-4953-b171-ac0d781bfb9b/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 6f9402c7018e79bcd90f9f57f21a87c915654b2dc0bedc517c733595f96920b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:42:37,068 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:42:37,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:42:37,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:42:37,201 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:42:37,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:42:37,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:42:37,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:42:37,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:42:37,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:42:37,248 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:42:37,249 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:42:37,249 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:42:37,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:42:37,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:42:37,252 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:42:37,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:42:37,253 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:42:37,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:42:37,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:42:37,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:42:37,256 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:42:37,257 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:42:37,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:42:37,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:42:37,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:42:37,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:42:37,260 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:42:37,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:37,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:42:37,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:42:37,263 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:42:37,263 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:42:37,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:42:37,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:42:37,264 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:42:37,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:42:37,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:42:37,265 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:42:37,266 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_1821a952-345e-4953-b171-ac0d781bfb9b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f9402c7018e79bcd90f9f57f21a87c915654b2dc0bedc517c733595f96920b4 [2023-11-19 07:42:37,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:42:37,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:42:37,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:42:37,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:42:37,567 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:42:37,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.i [2023-11-19 07:42:40,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:42:41,098 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:42:41,098 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.i [2023-11-19 07:42:41,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/data/4d77a4260/5ad6146d19e9473a8f1467acf35e1a80/FLAG4709fd3e2 [2023-11-19 07:42:41,124 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/data/4d77a4260/5ad6146d19e9473a8f1467acf35e1a80 [2023-11-19 07:42:41,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:42:41,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:42:41,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:41,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:42:41,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:42:41,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b64f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41, skipping insertion in model container [2023-11-19 07:42:41,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:42:41,335 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_1821a952-345e-4953-b171-ac0d781bfb9b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.i[916,929] [2023-11-19 07:42:41,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:41,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:42:41,453 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_1821a952-345e-4953-b171-ac0d781bfb9b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-98.i[916,929] [2023-11-19 07:42:41,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:42:41,524 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:42:41,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41 WrapperNode [2023-11-19 07:42:41,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:42:41,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:41,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:42:41,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:42:41,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,590 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 184 [2023-11-19 07:42:41,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:42:41,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:42:41,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:42:41,592 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:42:41,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:42:41,654 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:42:41,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:42:41,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:42:41,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (1/1) ... [2023-11-19 07:42:41,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:42:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:41,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:42:41,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:42:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:42:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:42:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:42:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:42:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:42:41,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:42:41,891 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:42:41,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:42:42,457 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:42:42,467 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:42:42,467 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:42:42,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:42 BoogieIcfgContainer [2023-11-19 07:42:42,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:42:42,475 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:42:42,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:42:42,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:42:42,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:42:41" (1/3) ... [2023-11-19 07:42:42,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efbb6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:42, skipping insertion in model container [2023-11-19 07:42:42,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:42:41" (2/3) ... [2023-11-19 07:42:42,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efbb6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:42:42, skipping insertion in model container [2023-11-19 07:42:42,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:42:42" (3/3) ... [2023-11-19 07:42:42,483 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-98.i [2023-11-19 07:42:42,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:42:42,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:42:42,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:42:42,571 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;@3266544c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:42:42,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:42:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 53 states have internal predecessors, (74), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 07:42:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-19 07:42:42,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:42,596 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:42,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:42,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1509306696, now seen corresponding path program 1 times [2023-11-19 07:42:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094659614] [2023-11-19 07:42:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:42,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094659614] [2023-11-19 07:42:42,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:42:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439160644] [2023-11-19 07:42:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:43,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:43,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:42:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:43,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:42:43,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-11-19 07:42:43,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439160644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:42:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395318518] [2023-11-19 07:42:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:43,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:42:43,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:42:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:42:43,465 INFO L87 Difference]: Start difference. First operand has 78 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 53 states have internal predecessors, (74), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 07:42:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:43,499 INFO L93 Difference]: Finished difference Result 153 states and 260 transitions. [2023-11-19 07:42:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:42:43,502 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) Word has length 152 [2023-11-19 07:42:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:43,516 INFO L225 Difference]: With dead ends: 153 [2023-11-19 07:42:43,516 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:42:43,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 151 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 07:42:43,527 INFO L413 NwaCegarLoop]: 117 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, 117 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 07:42:43,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:42:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:42:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-19 07:42:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 23 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 07:42:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 113 transitions. [2023-11-19 07:42:43,609 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 113 transitions. Word has length 152 [2023-11-19 07:42:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:43,610 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 113 transitions. [2023-11-19 07:42:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 07:42:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 113 transitions. [2023-11-19 07:42:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-19 07:42:43,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:43,615 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:43,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:43,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:42:43,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:43,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash 431303750, now seen corresponding path program 1 times [2023-11-19 07:42:43,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:43,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473990854] [2023-11-19 07:42:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:43,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:43,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940833804] [2023-11-19 07:42:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:43,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:44,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:42:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:44,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:44,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 498 proven. 24 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-11-19 07:42:44,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-11-19 07:42:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:44,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473990854] [2023-11-19 07:42:44,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:44,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940833804] [2023-11-19 07:42:44,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940833804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:44,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:44,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:42:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827249661] [2023-11-19 07:42:44,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:42:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:42:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:44,699 INFO L87 Difference]: Start difference. First operand 74 states and 113 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-19 07:42:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:44,963 INFO L93 Difference]: Finished difference Result 153 states and 230 transitions. [2023-11-19 07:42:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:42:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 152 [2023-11-19 07:42:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:44,967 INFO L225 Difference]: With dead ends: 153 [2023-11-19 07:42:44,967 INFO L226 Difference]: Without dead ends: 82 [2023-11-19 07:42:44,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:42:44,970 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 73 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:44,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 198 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:42:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-19 07:42:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2023-11-19 07:42:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-19 07:42:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 114 transitions. [2023-11-19 07:42:44,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 114 transitions. Word has length 152 [2023-11-19 07:42:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:44,990 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 114 transitions. [2023-11-19 07:42:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-19 07:42:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 114 transitions. [2023-11-19 07:42:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-19 07:42:44,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:44,994 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:45,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:45,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:42:45,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:45,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1457526140, now seen corresponding path program 1 times [2023-11-19 07:42:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:45,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569152377] [2023-11-19 07:42:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:45,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128618579] [2023-11-19 07:42:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:45,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:45,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:45,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:45,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:42:45,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 372 proven. 51 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-11-19 07:42:46,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-11-19 07:42:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569152377] [2023-11-19 07:42:46,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:46,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128618579] [2023-11-19 07:42:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128618579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:46,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:46,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 07:42:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449846049] [2023-11-19 07:42:46,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:46,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:42:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:46,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:42:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:42:46,593 INFO L87 Difference]: Start difference. First operand 78 states and 114 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2023-11-19 07:42:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:47,276 INFO L93 Difference]: Finished difference Result 276 states and 402 transitions. [2023-11-19 07:42:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:42:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) Word has length 153 [2023-11-19 07:42:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:47,281 INFO L225 Difference]: With dead ends: 276 [2023-11-19 07:42:47,281 INFO L226 Difference]: Without dead ends: 201 [2023-11-19 07:42:47,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:42:47,284 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 461 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:47,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 343 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:42:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-19 07:42:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2023-11-19 07:42:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 46 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-19 07:42:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2023-11-19 07:42:47,326 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 153 [2023-11-19 07:42:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:47,328 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2023-11-19 07:42:47,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2023-11-19 07:42:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2023-11-19 07:42:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-19 07:42:47,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:47,331 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:47,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:47,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:47,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:47,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash -536618566, now seen corresponding path program 1 times [2023-11-19 07:42:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:47,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641459019] [2023-11-19 07:42:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:47,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:47,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392209607] [2023-11-19 07:42:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:47,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:47,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:47,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:42:47,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 456 proven. 126 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-11-19 07:42:48,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 54 proven. 135 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-11-19 07:42:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:52,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641459019] [2023-11-19 07:42:52,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:52,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392209607] [2023-11-19 07:42:52,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392209607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:53,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:53,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 30 [2023-11-19 07:42:53,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943548605] [2023-11-19 07:42:53,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:42:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:42:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:42:53,006 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 9 states have call successors, (46), 5 states have call predecessors, (46), 9 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2023-11-19 07:43:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:43:01,037 INFO L93 Difference]: Finished difference Result 701 states and 973 transitions. [2023-11-19 07:43:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-19 07:43:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 9 states have call successors, (46), 5 states have call predecessors, (46), 9 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) Word has length 153 [2023-11-19 07:43:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:43:01,051 INFO L225 Difference]: With dead ends: 701 [2023-11-19 07:43:01,052 INFO L226 Difference]: Without dead ends: 626 [2023-11-19 07:43:01,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2236, Invalid=5246, Unknown=0, NotChecked=0, Total=7482 [2023-11-19 07:43:01,062 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1271 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:43:01,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 1320 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-19 07:43:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-19 07:43:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 270. [2023-11-19 07:43:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 180 states have (on average 1.25) internal successors, (225), 181 states have internal predecessors, (225), 74 states have call successors, (74), 15 states have call predecessors, (74), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-19 07:43:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 373 transitions. [2023-11-19 07:43:01,232 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 373 transitions. Word has length 153 [2023-11-19 07:43:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:43:01,233 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 373 transitions. [2023-11-19 07:43:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 9 states have call successors, (46), 5 states have call predecessors, (46), 9 states have return successors, (46), 9 states have call predecessors, (46), 9 states have call successors, (46) [2023-11-19 07:43:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 373 transitions. [2023-11-19 07:43:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-19 07:43:01,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:43:01,237 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:43:01,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:43:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:01,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:43:01,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:43:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2124966468, now seen corresponding path program 1 times [2023-11-19 07:43:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:43:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402892136] [2023-11-19 07:43:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:43:01,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:43:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080006322] [2023-11-19 07:43:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:43:01,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:43:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:43:01,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:43:01,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1821a952-345e-4953-b171-ac0d781bfb9b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:43:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:43:01,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-19 07:43:01,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:43:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 480 proven. 201 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-11-19 07:43:16,417 INFO L327 TraceCheckSpWp]: Computing backward predicates...