./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/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 b3751a2ceaae8972d788d7195cbb1b12ec209633513efd66a5d0e24c48ee8e17 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:35,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:35,347 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:35,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:35,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:35,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:35,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:35,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:35,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:35,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:35,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:35,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:35,386 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:35,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:35,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:35,388 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:35,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:35,389 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:35,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:35,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:35,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:35,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:35,392 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:35,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:35,393 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:35,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:35,395 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:35,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:35,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:35,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:35,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:35,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:35,398 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:35,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:35,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:35,399 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:35,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:35,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:35,400 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:35,401 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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3751a2ceaae8972d788d7195cbb1b12ec209633513efd66a5d0e24c48ee8e17 [2023-11-19 08:01:35,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:35,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:35,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:35,733 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:35,735 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:35,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.i [2023-11-19 08:01:39,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:39,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:39,402 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.i [2023-11-19 08:01:39,414 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/data/1872b9c6b/8ceb252fc25344cf8d68880d46dca2ca/FLAGbe3a45fde [2023-11-19 08:01:39,430 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/data/1872b9c6b/8ceb252fc25344cf8d68880d46dca2ca [2023-11-19 08:01:39,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:39,435 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:39,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:39,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:39,443 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:39,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:39,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60858ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39, skipping insertion in model container [2023-11-19 08:01:39,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:39,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:39,678 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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.i[916,929] [2023-11-19 08:01:39,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:39,791 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:39,804 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_d02e77bc-a7b7-44bb-875f-29cfbdda845b/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-22.i[916,929] [2023-11-19 08:01:39,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:39,907 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:39,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39 WrapperNode [2023-11-19 08:01:39,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:39,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:39,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:39,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:39,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:39,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,006 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 259 [2023-11-19 08:01:40,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:40,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:40,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:40,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:40,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,025 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:40,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:40,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:40,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:40,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (1/1) ... [2023-11-19 08:01:40,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:40,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:40,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:01:40,164 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:01:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:40,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:40,317 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:40,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:41,006 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:41,016 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:41,024 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:01:41,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:41 BoogieIcfgContainer [2023-11-19 08:01:41,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:41,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:41,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:41,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:41,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:39" (1/3) ... [2023-11-19 08:01:41,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9477d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:41, skipping insertion in model container [2023-11-19 08:01:41,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:39" (2/3) ... [2023-11-19 08:01:41,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9477d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:41, skipping insertion in model container [2023-11-19 08:01:41,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:41" (3/3) ... [2023-11-19 08:01:41,048 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-22.i [2023-11-19 08:01:41,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:41,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:41,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:41,161 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;@60c09c16, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:41,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:01:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.453125) internal successors, (93), 65 states have internal predecessors, (93), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 08:01:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 08:01:41,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:41,197 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:41,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:41,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1444508216, now seen corresponding path program 1 times [2023-11-19 08:01:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:41,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588398092] [2023-11-19 08:01:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:41,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588398092] [2023-11-19 08:01:41,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:01:41,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520508479] [2023-11-19 08:01:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:41,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:41,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:41,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:41,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:01:41,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-19 08:01:42,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520508479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:42,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270981449] [2023-11-19 08:01:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:42,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:42,148 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.453125) internal successors, (93), 65 states have internal predecessors, (93), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 08:01:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:42,185 INFO L93 Difference]: Finished difference Result 193 states and 338 transitions. [2023-11-19 08:01:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 199 [2023-11-19 08:01:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:42,196 INFO L225 Difference]: With dead ends: 193 [2023-11-19 08:01:42,197 INFO L226 Difference]: Without dead ends: 94 [2023-11-19 08:01:42,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 198 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 08:01:42,205 INFO L413 NwaCegarLoop]: 152 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, 152 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 08:01:42,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-19 08:01:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-19 08:01:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 61 states have internal predecessors, (86), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 08:01:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 148 transitions. [2023-11-19 08:01:42,260 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 148 transitions. Word has length 199 [2023-11-19 08:01:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 148 transitions. [2023-11-19 08:01:42,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 08:01:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 148 transitions. [2023-11-19 08:01:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 08:01:42,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:42,267 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:42,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:42,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:01:42,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:42,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2101347658, now seen corresponding path program 1 times [2023-11-19 08:01:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524692448] [2023-11-19 08:01:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:42,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:42,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999634739] [2023-11-19 08:01:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:42,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:42,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:42,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:01:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:42,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:01:42,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:43,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:43,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:43,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524692448] [2023-11-19 08:01:43,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:43,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999634739] [2023-11-19 08:01:43,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999634739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:43,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:43,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439417525] [2023-11-19 08:01:43,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:43,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:43,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:43,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:43,625 INFO L87 Difference]: Start difference. First operand 94 states and 148 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:43,988 INFO L93 Difference]: Finished difference Result 311 states and 493 transitions. [2023-11-19 08:01:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:01:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 199 [2023-11-19 08:01:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:43,994 INFO L225 Difference]: With dead ends: 311 [2023-11-19 08:01:43,994 INFO L226 Difference]: Without dead ends: 220 [2023-11-19 08:01:43,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:01:43,997 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 246 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:43,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 631 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-19 08:01:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 206. [2023-11-19 08:01:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 141 states have (on average 1.4539007092198581) internal successors, (205), 141 states have internal predecessors, (205), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 08:01:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 329 transitions. [2023-11-19 08:01:44,042 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 329 transitions. Word has length 199 [2023-11-19 08:01:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:44,043 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 329 transitions. [2023-11-19 08:01:44,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 329 transitions. [2023-11-19 08:01:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-19 08:01:44,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:44,048 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:44,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:44,277 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1882492940, now seen corresponding path program 1 times [2023-11-19 08:01:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385342561] [2023-11-19 08:01:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:44,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:44,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350825765] [2023-11-19 08:01:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:44,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:44,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:44,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:44,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:44,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385342561] [2023-11-19 08:01:44,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350825765] [2023-11-19 08:01:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350825765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:44,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:44,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891203692] [2023-11-19 08:01:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:44,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:44,855 INFO L87 Difference]: Start difference. First operand 206 states and 329 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:45,132 INFO L93 Difference]: Finished difference Result 539 states and 861 transitions. [2023-11-19 08:01:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 199 [2023-11-19 08:01:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:45,141 INFO L225 Difference]: With dead ends: 539 [2023-11-19 08:01:45,141 INFO L226 Difference]: Without dead ends: 336 [2023-11-19 08:01:45,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:01:45,148 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 250 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:45,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 534 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-19 08:01:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2023-11-19 08:01:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 197 states have internal predecessors, (280), 93 states have call successors, (93), 3 states have call predecessors, (93), 3 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-19 08:01:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 466 transitions. [2023-11-19 08:01:45,236 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 466 transitions. Word has length 199 [2023-11-19 08:01:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:45,237 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 466 transitions. [2023-11-19 08:01:45,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 466 transitions. [2023-11-19 08:01:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 08:01:45,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:45,241 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:45,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:45,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:45,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:45,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1309397746, now seen corresponding path program 1 times [2023-11-19 08:01:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:45,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236700713] [2023-11-19 08:01:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:45,528 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:45,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797790760] [2023-11-19 08:01:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:45,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:45,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:45,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:45,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:01:45,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:46,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:46,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236700713] [2023-11-19 08:01:46,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797790760] [2023-11-19 08:01:46,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797790760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:46,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:46,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844907333] [2023-11-19 08:01:46,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:46,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:46,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:46,421 INFO L87 Difference]: Start difference. First operand 294 states and 466 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:46,677 INFO L93 Difference]: Finished difference Result 724 states and 1143 transitions. [2023-11-19 08:01:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-19 08:01:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:46,683 INFO L225 Difference]: With dead ends: 724 [2023-11-19 08:01:46,683 INFO L226 Difference]: Without dead ends: 433 [2023-11-19 08:01:46,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:46,686 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 113 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:46,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 400 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-19 08:01:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 398. [2023-11-19 08:01:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 269 states have (on average 1.4312267657992566) internal successors, (385), 269 states have internal predecessors, (385), 124 states have call successors, (124), 4 states have call predecessors, (124), 4 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-19 08:01:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 633 transitions. [2023-11-19 08:01:46,752 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 633 transitions. Word has length 200 [2023-11-19 08:01:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:46,753 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 633 transitions. [2023-11-19 08:01:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:46,754 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 633 transitions. [2023-11-19 08:01:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 08:01:46,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:46,757 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:46,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:46,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:46,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:46,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1653908872, now seen corresponding path program 1 times [2023-11-19 08:01:46,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:46,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251430447] [2023-11-19 08:01:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:47,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010394428] [2023-11-19 08:01:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:47,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:47,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:01:47,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:47,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251430447] [2023-11-19 08:01:47,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010394428] [2023-11-19 08:01:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010394428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:47,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339170874] [2023-11-19 08:01:47,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:01:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:01:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:01:47,913 INFO L87 Difference]: Start difference. First operand 398 states and 633 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:48,306 INFO L93 Difference]: Finished difference Result 789 states and 1251 transitions. [2023-11-19 08:01:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:01:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-19 08:01:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:48,312 INFO L225 Difference]: With dead ends: 789 [2023-11-19 08:01:48,312 INFO L226 Difference]: Without dead ends: 450 [2023-11-19 08:01:48,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:01:48,315 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 234 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:48,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 636 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:48,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2023-11-19 08:01:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 397. [2023-11-19 08:01:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 268 states have (on average 1.4253731343283582) internal successors, (382), 268 states have internal predecessors, (382), 124 states have call successors, (124), 4 states have call predecessors, (124), 4 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-19 08:01:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 630 transitions. [2023-11-19 08:01:48,366 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 630 transitions. Word has length 202 [2023-11-19 08:01:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:48,367 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 630 transitions. [2023-11-19 08:01:48,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 630 transitions. [2023-11-19 08:01:48,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 08:01:48,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:48,371 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:48,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:48,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:48,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:48,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1519895366, now seen corresponding path program 1 times [2023-11-19 08:01:48,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246524549] [2023-11-19 08:01:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:48,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:48,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373833403] [2023-11-19 08:01:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:48,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:48,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:48,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:01:48,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:49,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246524549] [2023-11-19 08:01:49,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:49,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373833403] [2023-11-19 08:01:49,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373833403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:49,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:49,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:49,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386198317] [2023-11-19 08:01:49,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:49,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:49,513 INFO L87 Difference]: Start difference. First operand 397 states and 630 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:49,737 INFO L93 Difference]: Finished difference Result 1017 states and 1618 transitions. [2023-11-19 08:01:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:49,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-19 08:01:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:49,743 INFO L225 Difference]: With dead ends: 1017 [2023-11-19 08:01:49,744 INFO L226 Difference]: Without dead ends: 709 [2023-11-19 08:01:49,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:49,746 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 57 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:49,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 336 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-11-19 08:01:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 703. [2023-11-19 08:01:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 478 states have (on average 1.4184100418410042) internal successors, (678), 478 states have internal predecessors, (678), 217 states have call successors, (217), 7 states have call predecessors, (217), 7 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-11-19 08:01:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1112 transitions. [2023-11-19 08:01:49,841 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1112 transitions. Word has length 202 [2023-11-19 08:01:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:49,842 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 1112 transitions. [2023-11-19 08:01:49,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1112 transitions. [2023-11-19 08:01:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-19 08:01:49,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:49,846 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:49,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:50,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:50,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 933089352, now seen corresponding path program 1 times [2023-11-19 08:01:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:50,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603101460] [2023-11-19 08:01:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:50,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684911003] [2023-11-19 08:01:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:50,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:50,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:50,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:50,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:01:50,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:50,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:50,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:50,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603101460] [2023-11-19 08:01:50,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:50,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684911003] [2023-11-19 08:01:50,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684911003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:50,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:50,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:50,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251724987] [2023-11-19 08:01:50,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:50,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:50,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:50,631 INFO L87 Difference]: Start difference. First operand 703 states and 1112 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:50,969 INFO L93 Difference]: Finished difference Result 2197 states and 3490 transitions. [2023-11-19 08:01:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:01:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 202 [2023-11-19 08:01:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:50,984 INFO L225 Difference]: With dead ends: 2197 [2023-11-19 08:01:50,984 INFO L226 Difference]: Without dead ends: 1601 [2023-11-19 08:01:50,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:50,988 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 223 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:50,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 500 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-11-19 08:01:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1258. [2023-11-19 08:01:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 873 states have (on average 1.4284077892325315) internal successors, (1247), 873 states have internal predecessors, (1247), 372 states have call successors, (372), 12 states have call predecessors, (372), 12 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-19 08:01:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1991 transitions. [2023-11-19 08:01:51,193 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1991 transitions. Word has length 202 [2023-11-19 08:01:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:51,194 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1991 transitions. [2023-11-19 08:01:51,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1991 transitions. [2023-11-19 08:01:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 08:01:51,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:51,198 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:51,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 08:01:51,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:51,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:51,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:51,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1449813854, now seen corresponding path program 1 times [2023-11-19 08:01:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278556471] [2023-11-19 08:01:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:51,443 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:51,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561232163] [2023-11-19 08:01:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:51,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:51,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:01:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:51,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:51,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:01:51,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:51,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:51,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278556471] [2023-11-19 08:01:51,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:51,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561232163] [2023-11-19 08:01:51,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561232163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:51,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:51,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:01:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400473636] [2023-11-19 08:01:51,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:51,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:51,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:51,717 INFO L87 Difference]: Start difference. First operand 1258 states and 1991 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:51,923 INFO L93 Difference]: Finished difference Result 2891 states and 4553 transitions. [2023-11-19 08:01:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-19 08:01:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:51,937 INFO L225 Difference]: With dead ends: 2891 [2023-11-19 08:01:51,937 INFO L226 Difference]: Without dead ends: 1722 [2023-11-19 08:01:51,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:51,946 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 67 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:51,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 426 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2023-11-19 08:01:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1383. [2023-11-19 08:01:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 998 states have (on average 1.4108216432865732) internal successors, (1408), 998 states have internal predecessors, (1408), 372 states have call successors, (372), 12 states have call predecessors, (372), 12 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-19 08:01:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2152 transitions. [2023-11-19 08:01:52,152 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2152 transitions. Word has length 203 [2023-11-19 08:01:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:52,153 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2152 transitions. [2023-11-19 08:01:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:01:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2152 transitions. [2023-11-19 08:01:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 08:01:52,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:52,157 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:52,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:52,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:52,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:52,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -544330852, now seen corresponding path program 1 times [2023-11-19 08:01:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608083947] [2023-11-19 08:01:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:52,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41275277] [2023-11-19 08:01:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:52,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:52,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:52,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:01:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:52,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:01:52,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 828 proven. 27 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2023-11-19 08:01:54,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 63 proven. 27 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2023-11-19 08:01:55,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:55,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608083947] [2023-11-19 08:01:55,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:55,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41275277] [2023-11-19 08:01:55,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41275277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:55,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:55,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-19 08:01:55,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186788044] [2023-11-19 08:01:55,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 08:01:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 08:01:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-19 08:01:55,503 INFO L87 Difference]: Start difference. First operand 1383 states and 2152 transitions. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-19 08:01:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:58,687 INFO L93 Difference]: Finished difference Result 4846 states and 7423 transitions. [2023-11-19 08:01:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 08:01:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 203 [2023-11-19 08:01:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:58,717 INFO L225 Difference]: With dead ends: 4846 [2023-11-19 08:01:58,717 INFO L226 Difference]: Without dead ends: 3630 [2023-11-19 08:01:58,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=491, Invalid=991, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 08:01:58,725 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 752 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:58,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1224 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 08:01:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2023-11-19 08:01:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3087. [2023-11-19 08:01:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 2190 states have (on average 1.3817351598173515) internal successors, (3026), 2190 states have internal predecessors, (3026), 837 states have call successors, (837), 59 states have call predecessors, (837), 59 states have return successors, (837), 837 states have call predecessors, (837), 837 states have call successors, (837) [2023-11-19 08:01:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4700 transitions. [2023-11-19 08:01:59,280 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4700 transitions. Word has length 203 [2023-11-19 08:01:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:59,281 INFO L495 AbstractCegarLoop]: Abstraction has 3087 states and 4700 transitions. [2023-11-19 08:01:59,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (62), 3 states have call predecessors, (62), 5 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2023-11-19 08:01:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4700 transitions. [2023-11-19 08:01:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 08:01:59,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:59,285 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:59,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:59,492 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:59,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -286165414, now seen corresponding path program 1 times [2023-11-19 08:01:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585329842] [2023-11-19 08:01:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:59,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840228156] [2023-11-19 08:01:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:59,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:59,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:01:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 08:01:59,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 839 proven. 48 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2023-11-19 08:02:01,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-19 08:02:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:02,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585329842] [2023-11-19 08:02:02,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840228156] [2023-11-19 08:02:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840228156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:02,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:02,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2023-11-19 08:02:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095724467] [2023-11-19 08:02:02,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 08:02:02,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 08:02:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:02:02,246 INFO L87 Difference]: Start difference. First operand 3087 states and 4700 transitions. Second operand has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 08:02:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:04,918 INFO L93 Difference]: Finished difference Result 4978 states and 7581 transitions. [2023-11-19 08:02:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 08:02:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) Word has length 203 [2023-11-19 08:02:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:04,933 INFO L225 Difference]: With dead ends: 4978 [2023-11-19 08:02:04,933 INFO L226 Difference]: Without dead ends: 2110 [2023-11-19 08:02:04,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=1275, Unknown=0, NotChecked=0, Total=1806 [2023-11-19 08:02:04,943 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 537 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:04,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1222 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 08:02:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2023-11-19 08:02:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1383. [2023-11-19 08:02:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 995 states have (on average 1.4040201005025126) internal successors, (1397), 995 states have internal predecessors, (1397), 372 states have call successors, (372), 15 states have call predecessors, (372), 15 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-19 08:02:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2141 transitions. [2023-11-19 08:02:05,211 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2141 transitions. Word has length 203 [2023-11-19 08:02:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:05,213 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2141 transitions. [2023-11-19 08:02:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 08:02:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2141 transitions. [2023-11-19 08:02:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 08:02:05,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:05,216 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:05,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:02:05,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:05,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2032643789, now seen corresponding path program 1 times [2023-11-19 08:02:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906532077] [2023-11-19 08:02:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:05,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:05,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577475228] [2023-11-19 08:02:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:05,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:05,468 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:05,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:02:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:05,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:05,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 08:02:05,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:05,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906532077] [2023-11-19 08:02:05,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:05,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577475228] [2023-11-19 08:02:05,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577475228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:05,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:05,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:05,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042594919] [2023-11-19 08:02:05,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:05,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:05,683 INFO L87 Difference]: Start difference. First operand 1383 states and 2141 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:02:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:05,887 INFO L93 Difference]: Finished difference Result 2972 states and 4604 transitions. [2023-11-19 08:02:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-19 08:02:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:05,899 INFO L225 Difference]: With dead ends: 2972 [2023-11-19 08:02:05,900 INFO L226 Difference]: Without dead ends: 1720 [2023-11-19 08:02:05,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:05,904 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 38 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:05,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 285 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2023-11-19 08:02:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1546. [2023-11-19 08:02:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1158 states have (on average 1.4162348877374784) internal successors, (1640), 1158 states have internal predecessors, (1640), 372 states have call successors, (372), 15 states have call predecessors, (372), 15 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-19 08:02:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2384 transitions. [2023-11-19 08:02:06,140 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2384 transitions. Word has length 203 [2023-11-19 08:02:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:06,140 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 2384 transitions. [2023-11-19 08:02:06,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 08:02:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2384 transitions. [2023-11-19 08:02:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 08:02:06,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:06,144 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:06,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:06,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:02:06,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:06,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash 752780111, now seen corresponding path program 1 times [2023-11-19 08:02:06,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:06,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486513454] [2023-11-19 08:02:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:06,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244236243] [2023-11-19 08:02:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:06,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:06,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:06,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d02e77bc-a7b7-44bb-875f-29cfbdda845b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:02:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:06,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-19 08:02:06,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1565 proven. 102 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-11-19 08:02:14,701 INFO L327 TraceCheckSpWp]: Computing backward predicates...