./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50b0a90f24476d3b8404a11c5a11650cef36326e0b80eb9bfd0bc8b7617d7b0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:33:58,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:33:58,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:33:58,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:33:58,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:33:58,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:33:58,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:33:58,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:33:58,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:33:58,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:33:58,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:33:58,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:33:58,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:33:58,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:33:58,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:33:58,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:33:58,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:33:58,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:33:58,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:33:58,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:33:58,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:33:58,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:33:58,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:33:58,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:33:58,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:33:58,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:33:58,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:33:58,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:33:58,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:33:58,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:33:58,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:33:58,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:33:58,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:33:58,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:33:58,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:33:58,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:33:58,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:33:58,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:33:58,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:33:58,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:33:58,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:33:58,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:33:58,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:33:58,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:33:58,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:33:58,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:33:58,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:33:58,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:33:58,410 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:33:58,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:33:58,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:33:58,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:33:58,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:33:58,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:33:58,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:33:58,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:33:58,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:33:58,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:33:58,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:33:58,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:33:58,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:33:58,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:33:58,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:33:58,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:33:58,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:33:58,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:33:58,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:33:58,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:33:58,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:33:58,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:33:58,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:33:58,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:33:58,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:33:58,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:33:58,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50b0a90f24476d3b8404a11c5a11650cef36326e0b80eb9bfd0bc8b7617d7b0d [2021-11-09 09:33:58,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:33:58,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:33:58,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:33:58,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:33:58,744 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:33:58,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2021-11-09 09:33:58,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/data/456d1bb47/8cebab3387a84930b253ca12acbef731/FLAG4e839d17c [2021-11-09 09:33:59,294 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:33:59,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2021-11-09 09:33:59,325 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/data/456d1bb47/8cebab3387a84930b253ca12acbef731/FLAG4e839d17c [2021-11-09 09:33:59,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/data/456d1bb47/8cebab3387a84930b253ca12acbef731 [2021-11-09 09:33:59,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:33:59,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:33:59,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:33:59,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:33:59,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:33:59,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:33:59" (1/1) ... [2021-11-09 09:33:59,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2662354e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:33:59, skipping insertion in model container [2021-11-09 09:33:59,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:33:59" (1/1) ... [2021-11-09 09:33:59,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:33:59,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:33:59,994 WARN L228 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_2a699be4-df15-40e9-9fef-fee0c27dea02/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2021-11-09 09:33:59,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:34:00,008 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:34:00,057 WARN L228 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_2a699be4-df15-40e9-9fef-fee0c27dea02/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2021-11-09 09:34:00,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:34:00,078 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:34:00,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00 WrapperNode [2021-11-09 09:34:00,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:34:00,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:34:00,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:34:00,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:34:00,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:34:00,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:34:00,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:34:00,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:34:00,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:34:00,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:34:00,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:34:00,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:34:00,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (1/1) ... [2021-11-09 09:34:00,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:34:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:00,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:34:00,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:34:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:34:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:34:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:34:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:34:00,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:34:00,930 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-09 09:34:00,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:34:00 BoogieIcfgContainer [2021-11-09 09:34:00,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:34:00,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:34:00,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:34:00,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:34:00,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:33:59" (1/3) ... [2021-11-09 09:34:00,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58898299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:34:00, skipping insertion in model container [2021-11-09 09:34:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:00" (2/3) ... [2021-11-09 09:34:00,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58898299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:34:00, skipping insertion in model container [2021-11-09 09:34:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:34:00" (3/3) ... [2021-11-09 09:34:00,949 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2021-11-09 09:34:00,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:34:00,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:34:01,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:34:01,038 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:34:01,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:34:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 77 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:34:01,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:01,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:01,063 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash -171388107, now seen corresponding path program 1 times [2021-11-09 09:34:01,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:01,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753108374] [2021-11-09 09:34:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:01,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:01,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753108374] [2021-11-09 09:34:01,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753108374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:01,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:01,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:34:01,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400348667] [2021-11-09 09:34:01,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:34:01,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:34:01,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:34:01,323 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 77 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:01,346 INFO L93 Difference]: Finished difference Result 124 states and 205 transitions. [2021-11-09 09:34:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:34:01,348 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:34:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:01,358 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:34:01,358 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 09:34:01,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:34:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 09:34:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 09:34:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 73 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 123 transitions. [2021-11-09 09:34:01,401 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 123 transitions. Word has length 29 [2021-11-09 09:34:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 123 transitions. [2021-11-09 09:34:01,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 123 transitions. [2021-11-09 09:34:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:34:01,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:01,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:01,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:34:01,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -305401613, now seen corresponding path program 1 times [2021-11-09 09:34:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:01,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245499001] [2021-11-09 09:34:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:01,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:01,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:01,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245499001] [2021-11-09 09:34:01,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245499001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:01,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:01,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:34:01,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447955161] [2021-11-09 09:34:01,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:34:01,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:01,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:34:01,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:34:01,574 INFO L87 Difference]: Start difference. First operand 74 states and 123 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:01,696 INFO L93 Difference]: Finished difference Result 123 states and 198 transitions. [2021-11-09 09:34:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:34:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:34:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:01,701 INFO L225 Difference]: With dead ends: 123 [2021-11-09 09:34:01,702 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 09:34:01,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:34:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 09:34:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 09:34:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.36986301369863) internal successors, (100), 73 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-11-09 09:34:01,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 29 [2021-11-09 09:34:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:01,714 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-11-09 09:34:01,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-11-09 09:34:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:34:01,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:01,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:01,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:34:01,722 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1295954354, now seen corresponding path program 1 times [2021-11-09 09:34:01,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:01,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142032728] [2021-11-09 09:34:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:01,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:01,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:01,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142032728] [2021-11-09 09:34:01,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142032728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:01,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:01,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:01,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143258437] [2021-11-09 09:34:01,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:01,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:01,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:01,847 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:01,870 INFO L93 Difference]: Finished difference Result 158 states and 232 transitions. [2021-11-09 09:34:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:01,871 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 09:34:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:01,873 INFO L225 Difference]: With dead ends: 158 [2021-11-09 09:34:01,873 INFO L226 Difference]: Without dead ends: 113 [2021-11-09 09:34:01,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-09 09:34:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-11-09 09:34:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 110 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2021-11-09 09:34:01,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 51 [2021-11-09 09:34:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:01,888 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2021-11-09 09:34:01,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2021-11-09 09:34:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:34:01,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:01,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:01,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:34:01,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1404728260, now seen corresponding path program 1 times [2021-11-09 09:34:01,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:01,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469039414] [2021-11-09 09:34:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:01,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:02,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:02,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469039414] [2021-11-09 09:34:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469039414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:02,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:02,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623759243] [2021-11-09 09:34:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:02,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:02,051 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:02,095 INFO L93 Difference]: Finished difference Result 263 states and 399 transitions. [2021-11-09 09:34:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:02,095 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 09:34:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:02,098 INFO L225 Difference]: With dead ends: 263 [2021-11-09 09:34:02,098 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 09:34:02,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 09:34:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-11-09 09:34:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4943820224719102) internal successors, (266), 178 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 266 transitions. [2021-11-09 09:34:02,122 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 266 transitions. Word has length 51 [2021-11-09 09:34:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:02,123 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 266 transitions. [2021-11-09 09:34:02,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 266 transitions. [2021-11-09 09:34:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:34:02,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:02,125 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:02,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:34:02,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1742521402, now seen corresponding path program 1 times [2021-11-09 09:34:02,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:02,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105173119] [2021-11-09 09:34:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:02,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:02,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:02,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105173119] [2021-11-09 09:34:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105173119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:02,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:02,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891618865] [2021-11-09 09:34:02,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:02,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:02,272 INFO L87 Difference]: Start difference. First operand 179 states and 266 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:02,528 INFO L93 Difference]: Finished difference Result 1379 states and 2162 transitions. [2021-11-09 09:34:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:34:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 09:34:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:02,539 INFO L225 Difference]: With dead ends: 1379 [2021-11-09 09:34:02,540 INFO L226 Difference]: Without dead ends: 1229 [2021-11-09 09:34:02,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:34:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-11-09 09:34:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 327. [2021-11-09 09:34:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5153374233128833) internal successors, (494), 326 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 494 transitions. [2021-11-09 09:34:02,620 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 494 transitions. Word has length 51 [2021-11-09 09:34:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:02,620 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 494 transitions. [2021-11-09 09:34:02,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 494 transitions. [2021-11-09 09:34:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:34:02,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:02,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:02,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:34:02,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1889876246, now seen corresponding path program 1 times [2021-11-09 09:34:02,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:02,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115713315] [2021-11-09 09:34:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:02,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115713315] [2021-11-09 09:34:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115713315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:02,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:02,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932075124] [2021-11-09 09:34:02,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:02,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:02,710 INFO L87 Difference]: Start difference. First operand 327 states and 494 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:02,780 INFO L93 Difference]: Finished difference Result 879 states and 1348 transitions. [2021-11-09 09:34:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:34:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:02,792 INFO L225 Difference]: With dead ends: 879 [2021-11-09 09:34:02,793 INFO L226 Difference]: Without dead ends: 581 [2021-11-09 09:34:02,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-09 09:34:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2021-11-09 09:34:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.4982456140350877) internal successors, (854), 570 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 854 transitions. [2021-11-09 09:34:02,845 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 854 transitions. Word has length 53 [2021-11-09 09:34:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:02,847 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 854 transitions. [2021-11-09 09:34:02,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 854 transitions. [2021-11-09 09:34:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:34:02,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:02,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:34:02,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1823382734, now seen corresponding path program 1 times [2021-11-09 09:34:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:02,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371747164] [2021-11-09 09:34:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:02,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:03,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:03,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371747164] [2021-11-09 09:34:03,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371747164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:03,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:03,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:03,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851312730] [2021-11-09 09:34:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:03,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:03,095 INFO L87 Difference]: Start difference. First operand 571 states and 854 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:03,241 INFO L93 Difference]: Finished difference Result 1115 states and 1680 transitions. [2021-11-09 09:34:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:34:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:03,246 INFO L225 Difference]: With dead ends: 1115 [2021-11-09 09:34:03,246 INFO L226 Difference]: Without dead ends: 573 [2021-11-09 09:34:03,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:34:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-09 09:34:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2021-11-09 09:34:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.4842105263157894) internal successors, (846), 570 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 846 transitions. [2021-11-09 09:34:03,286 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 846 transitions. Word has length 53 [2021-11-09 09:34:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:03,286 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 846 transitions. [2021-11-09 09:34:03,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 846 transitions. [2021-11-09 09:34:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:34:03,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:03,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:03,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:34:03,289 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -34468658, now seen corresponding path program 1 times [2021-11-09 09:34:03,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:03,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650315396] [2021-11-09 09:34:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:03,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:03,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:03,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650315396] [2021-11-09 09:34:03,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650315396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:03,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:03,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:03,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090405406] [2021-11-09 09:34:03,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:03,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:03,353 INFO L87 Difference]: Start difference. First operand 571 states and 846 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:03,415 INFO L93 Difference]: Finished difference Result 1559 states and 2320 transitions. [2021-11-09 09:34:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:34:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:03,423 INFO L225 Difference]: With dead ends: 1559 [2021-11-09 09:34:03,423 INFO L226 Difference]: Without dead ends: 1017 [2021-11-09 09:34:03,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-11-09 09:34:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1015. [2021-11-09 09:34:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 1.4654832347140039) internal successors, (1486), 1014 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1486 transitions. [2021-11-09 09:34:03,492 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1486 transitions. Word has length 53 [2021-11-09 09:34:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:03,493 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 1486 transitions. [2021-11-09 09:34:03,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1486 transitions. [2021-11-09 09:34:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 09:34:03,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:03,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:34:03,497 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1105013027, now seen corresponding path program 1 times [2021-11-09 09:34:03,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:03,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68811961] [2021-11-09 09:34:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:03,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:03,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:03,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68811961] [2021-11-09 09:34:03,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68811961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:03,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:03,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:34:03,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019759008] [2021-11-09 09:34:03,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:34:03,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:34:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:34:03,621 INFO L87 Difference]: Start difference. First operand 1015 states and 1486 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:03,765 INFO L93 Difference]: Finished difference Result 1769 states and 2571 transitions. [2021-11-09 09:34:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:34:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 09:34:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:03,776 INFO L225 Difference]: With dead ends: 1769 [2021-11-09 09:34:03,776 INFO L226 Difference]: Without dead ends: 1767 [2021-11-09 09:34:03,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:34:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-11-09 09:34:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1063. [2021-11-09 09:34:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 1.4369114877589453) internal successors, (1526), 1062 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1526 transitions. [2021-11-09 09:34:03,880 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1526 transitions. Word has length 54 [2021-11-09 09:34:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:03,881 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1526 transitions. [2021-11-09 09:34:03,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1526 transitions. [2021-11-09 09:34:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:34:03,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:03,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:03,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:34:03,882 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582089, now seen corresponding path program 1 times [2021-11-09 09:34:03,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:03,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195124229] [2021-11-09 09:34:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:03,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:03,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:03,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195124229] [2021-11-09 09:34:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195124229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:03,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:03,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:03,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506972528] [2021-11-09 09:34:03,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:03,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:03,954 INFO L87 Difference]: Start difference. First operand 1063 states and 1526 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:04,053 INFO L93 Difference]: Finished difference Result 2126 states and 3084 transitions. [2021-11-09 09:34:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 09:34:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:04,062 INFO L225 Difference]: With dead ends: 2126 [2021-11-09 09:34:04,062 INFO L226 Difference]: Without dead ends: 1531 [2021-11-09 09:34:04,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-11-09 09:34:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1529. [2021-11-09 09:34:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.4293193717277486) internal successors, (2184), 1528 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2184 transitions. [2021-11-09 09:34:04,191 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2184 transitions. Word has length 55 [2021-11-09 09:34:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:04,192 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2184 transitions. [2021-11-09 09:34:04,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2184 transitions. [2021-11-09 09:34:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:34:04,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:04,194 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:34:04,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash -993002958, now seen corresponding path program 1 times [2021-11-09 09:34:04,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:04,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902555459] [2021-11-09 09:34:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:04,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:34:04,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:04,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902555459] [2021-11-09 09:34:04,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902555459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:04,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:04,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:04,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257849299] [2021-11-09 09:34:04,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:04,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:04,297 INFO L87 Difference]: Start difference. First operand 1529 states and 2184 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:04,818 INFO L93 Difference]: Finished difference Result 7835 states and 11225 transitions. [2021-11-09 09:34:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:34:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:04,857 INFO L225 Difference]: With dead ends: 7835 [2021-11-09 09:34:04,857 INFO L226 Difference]: Without dead ends: 6337 [2021-11-09 09:34:04,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-11-09 09:34:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 3025. [2021-11-09 09:34:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 1.4259259259259258) internal successors, (4312), 3024 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4312 transitions. [2021-11-09 09:34:05,132 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4312 transitions. Word has length 77 [2021-11-09 09:34:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:05,132 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 4312 transitions. [2021-11-09 09:34:05,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4312 transitions. [2021-11-09 09:34:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:34:05,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:05,141 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:05,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:34:05,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1543800376, now seen corresponding path program 1 times [2021-11-09 09:34:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277848948] [2021-11-09 09:34:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:05,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:34:05,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:05,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277848948] [2021-11-09 09:34:05,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277848948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:05,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:05,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:05,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302469010] [2021-11-09 09:34:05,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:05,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:05,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:05,239 INFO L87 Difference]: Start difference. First operand 3025 states and 4312 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:05,840 INFO L93 Difference]: Finished difference Result 9331 states and 13353 transitions. [2021-11-09 09:34:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:34:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:05,886 INFO L225 Difference]: With dead ends: 9331 [2021-11-09 09:34:05,886 INFO L226 Difference]: Without dead ends: 7833 [2021-11-09 09:34:05,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-11-09 09:34:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5273. [2021-11-09 09:34:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.4195751138088013) internal successors, (7484), 5272 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7484 transitions. [2021-11-09 09:34:06,357 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7484 transitions. Word has length 77 [2021-11-09 09:34:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:06,357 INFO L470 AbstractCegarLoop]: Abstraction has 5273 states and 7484 transitions. [2021-11-09 09:34:06,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7484 transitions. [2021-11-09 09:34:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:34:06,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:06,361 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:06,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:34:06,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash -412160536, now seen corresponding path program 1 times [2021-11-09 09:34:06,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:06,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193804710] [2021-11-09 09:34:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:06,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:34:06,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:06,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193804710] [2021-11-09 09:34:06,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193804710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:06,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:06,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:06,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567687915] [2021-11-09 09:34:06,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:06,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:06,479 INFO L87 Difference]: Start difference. First operand 5273 states and 7484 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:07,067 INFO L93 Difference]: Finished difference Result 10827 states and 15481 transitions. [2021-11-09 09:34:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:07,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:34:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:07,109 INFO L225 Difference]: With dead ends: 10827 [2021-11-09 09:34:07,110 INFO L226 Difference]: Without dead ends: 9329 [2021-11-09 09:34:07,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-11-09 09:34:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 6769. [2021-11-09 09:34:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 1.4202127659574468) internal successors, (9612), 6768 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9612 transitions. [2021-11-09 09:34:07,662 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9612 transitions. Word has length 77 [2021-11-09 09:34:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:07,662 INFO L470 AbstractCegarLoop]: Abstraction has 6769 states and 9612 transitions. [2021-11-09 09:34:07,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9612 transitions. [2021-11-09 09:34:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:34:07,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:07,667 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:07,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:34:07,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1033264429, now seen corresponding path program 1 times [2021-11-09 09:34:07,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:07,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141901394] [2021-11-09 09:34:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:07,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:34:07,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:07,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141901394] [2021-11-09 09:34:07,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141901394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:07,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:07,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:34:07,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410240218] [2021-11-09 09:34:07,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:07,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:07,748 INFO L87 Difference]: Start difference. First operand 6769 states and 9612 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:08,492 INFO L93 Difference]: Finished difference Result 11443 states and 16377 transitions. [2021-11-09 09:34:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:34:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:08,523 INFO L225 Difference]: With dead ends: 11443 [2021-11-09 09:34:08,523 INFO L226 Difference]: Without dead ends: 10385 [2021-11-09 09:34:08,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2021-11-09 09:34:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 7825. [2021-11-09 09:34:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7824 states have (on average 1.42280163599182) internal successors, (11132), 7824 states have internal predecessors, (11132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 11132 transitions. [2021-11-09 09:34:09,101 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 11132 transitions. Word has length 79 [2021-11-09 09:34:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:09,101 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 11132 transitions. [2021-11-09 09:34:09,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 11132 transitions. [2021-11-09 09:34:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:34:09,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:09,106 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:09,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:34:09,106 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2142307542, now seen corresponding path program 1 times [2021-11-09 09:34:09,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:09,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759400847] [2021-11-09 09:34:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:09,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:09,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:09,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759400847] [2021-11-09 09:34:09,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759400847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:09,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:09,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:09,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635666870] [2021-11-09 09:34:09,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:09,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:09,159 INFO L87 Difference]: Start difference. First operand 7825 states and 11132 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:09,557 INFO L93 Difference]: Finished difference Result 13662 states and 19524 transitions. [2021-11-09 09:34:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 09:34:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:09,572 INFO L225 Difference]: With dead ends: 13662 [2021-11-09 09:34:09,572 INFO L226 Difference]: Without dead ends: 5868 [2021-11-09 09:34:09,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2021-11-09 09:34:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5866. [2021-11-09 09:34:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5865 states have (on average 1.4208013640238704) internal successors, (8333), 5865 states have internal predecessors, (8333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 8333 transitions. [2021-11-09 09:34:09,966 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 8333 transitions. Word has length 79 [2021-11-09 09:34:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:09,966 INFO L470 AbstractCegarLoop]: Abstraction has 5866 states and 8333 transitions. [2021-11-09 09:34:09,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 8333 transitions. [2021-11-09 09:34:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:34:09,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:09,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:09,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:34:09,970 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -848547533, now seen corresponding path program 1 times [2021-11-09 09:34:09,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:09,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719736473] [2021-11-09 09:34:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:09,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:10,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:10,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719736473] [2021-11-09 09:34:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719736473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:10,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:10,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:10,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040534803] [2021-11-09 09:34:10,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:10,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:10,027 INFO L87 Difference]: Start difference. First operand 5866 states and 8333 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:10,275 INFO L93 Difference]: Finished difference Result 8774 states and 12471 transitions. [2021-11-09 09:34:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:34:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:10,284 INFO L225 Difference]: With dead ends: 8774 [2021-11-09 09:34:10,284 INFO L226 Difference]: Without dead ends: 2964 [2021-11-09 09:34:10,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-11-09 09:34:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2962. [2021-11-09 09:34:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 1.402566700439041) internal successors, (4153), 2961 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4153 transitions. [2021-11-09 09:34:10,513 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4153 transitions. Word has length 80 [2021-11-09 09:34:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:10,513 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4153 transitions. [2021-11-09 09:34:10,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4153 transitions. [2021-11-09 09:34:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:34:10,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:10,516 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:10,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:34:10,517 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1967822743, now seen corresponding path program 1 times [2021-11-09 09:34:10,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:10,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109425702] [2021-11-09 09:34:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:10,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:10,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:10,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109425702] [2021-11-09 09:34:10,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109425702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:10,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460867699] [2021-11-09 09:34:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:10,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:10,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:10,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:34:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:34:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:34:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460867699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:11,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:11,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-09 09:34:11,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800833554] [2021-11-09 09:34:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:34:11,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:34:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:34:11,638 INFO L87 Difference]: Start difference. First operand 2962 states and 4153 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:14,025 INFO L93 Difference]: Finished difference Result 15755 states and 21837 transitions. [2021-11-09 09:34:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:34:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:34:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:14,062 INFO L225 Difference]: With dead ends: 15755 [2021-11-09 09:34:14,063 INFO L226 Difference]: Without dead ends: 12849 [2021-11-09 09:34:14,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:34:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2021-11-09 09:34:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 9681. [2021-11-09 09:34:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9681 states, 9680 states have (on average 1.3409090909090908) internal successors, (12980), 9680 states have internal predecessors, (12980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9681 states to 9681 states and 12980 transitions. [2021-11-09 09:34:14,962 INFO L78 Accepts]: Start accepts. Automaton has 9681 states and 12980 transitions. Word has length 80 [2021-11-09 09:34:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 9681 states and 12980 transitions. [2021-11-09 09:34:14,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 14 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 9681 states and 12980 transitions. [2021-11-09 09:34:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:34:14,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:14,965 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:15,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:15,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:34:15,192 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1522570607, now seen corresponding path program 1 times [2021-11-09 09:34:15,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:15,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281784775] [2021-11-09 09:34:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:15,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:15,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281784775] [2021-11-09 09:34:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281784775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306497210] [2021-11-09 09:34:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:15,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:15,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:15,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:15,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:34:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:34:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:17,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306497210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:17,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:17,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 09:34:17,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553821714] [2021-11-09 09:34:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:34:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:34:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:34:17,061 INFO L87 Difference]: Start difference. First operand 9681 states and 12980 transitions. Second operand has 17 states, 17 states have (on average 8.941176470588236) internal successors, (152), 16 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:31,649 INFO L93 Difference]: Finished difference Result 134594 states and 179182 transitions. [2021-11-09 09:34:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-09 09:34:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.941176470588236) internal successors, (152), 16 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:31,914 INFO L225 Difference]: With dead ends: 134594 [2021-11-09 09:34:31,915 INFO L226 Difference]: Without dead ends: 125710 [2021-11-09 09:34:32,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9873 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3227, Invalid=21579, Unknown=0, NotChecked=0, Total=24806 [2021-11-09 09:34:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125710 states. [2021-11-09 09:34:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125710 to 49637. [2021-11-09 09:34:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49637 states, 49636 states have (on average 1.3330848577645258) internal successors, (66169), 49636 states have internal predecessors, (66169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49637 states to 49637 states and 66169 transitions. [2021-11-09 09:34:36,777 INFO L78 Accepts]: Start accepts. Automaton has 49637 states and 66169 transitions. Word has length 81 [2021-11-09 09:34:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:36,778 INFO L470 AbstractCegarLoop]: Abstraction has 49637 states and 66169 transitions. [2021-11-09 09:34:36,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.941176470588236) internal successors, (152), 16 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49637 states and 66169 transitions. [2021-11-09 09:34:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:34:36,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:36,784 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:36,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:36,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:34:37,000 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash -528924681, now seen corresponding path program 1 times [2021-11-09 09:34:37,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:37,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264912086] [2021-11-09 09:34:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:37,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:37,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264912086] [2021-11-09 09:34:37,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264912086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:37,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:37,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:37,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964670736] [2021-11-09 09:34:37,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:37,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:37,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:37,060 INFO L87 Difference]: Start difference. First operand 49637 states and 66169 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:39,502 INFO L93 Difference]: Finished difference Result 74488 states and 99666 transitions. [2021-11-09 09:34:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:39,554 INFO L225 Difference]: With dead ends: 74488 [2021-11-09 09:34:39,555 INFO L226 Difference]: Without dead ends: 29761 [2021-11-09 09:34:39,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29761 states. [2021-11-09 09:34:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29761 to 29339. [2021-11-09 09:34:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29339 states, 29338 states have (on average 1.3050310177926239) internal successors, (38287), 29338 states have internal predecessors, (38287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29339 states to 29339 states and 38287 transitions. [2021-11-09 09:34:41,648 INFO L78 Accepts]: Start accepts. Automaton has 29339 states and 38287 transitions. Word has length 81 [2021-11-09 09:34:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 29339 states and 38287 transitions. [2021-11-09 09:34:41,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 29339 states and 38287 transitions. [2021-11-09 09:34:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:34:41,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:41,653 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:41,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:34:41,653 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1226024447, now seen corresponding path program 1 times [2021-11-09 09:34:41,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:41,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308993461] [2021-11-09 09:34:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:41,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:34:41,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:41,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308993461] [2021-11-09 09:34:41,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308993461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:41,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:41,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:34:41,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028295008] [2021-11-09 09:34:41,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:41,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:41,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:41,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:41,725 INFO L87 Difference]: Start difference. First operand 29339 states and 38287 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:44,233 INFO L93 Difference]: Finished difference Result 53899 states and 70650 transitions. [2021-11-09 09:34:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:44,269 INFO L225 Difference]: With dead ends: 53899 [2021-11-09 09:34:44,269 INFO L226 Difference]: Without dead ends: 24676 [2021-11-09 09:34:44,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24676 states. [2021-11-09 09:34:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24676 to 24676. [2021-11-09 09:34:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24676 states, 24675 states have (on average 1.293130699088146) internal successors, (31908), 24675 states have internal predecessors, (31908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24676 states to 24676 states and 31908 transitions. [2021-11-09 09:34:46,166 INFO L78 Accepts]: Start accepts. Automaton has 24676 states and 31908 transitions. Word has length 81 [2021-11-09 09:34:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:46,166 INFO L470 AbstractCegarLoop]: Abstraction has 24676 states and 31908 transitions. [2021-11-09 09:34:46,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24676 states and 31908 transitions. [2021-11-09 09:34:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:34:46,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:46,170 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:46,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:34:46,170 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash -251255969, now seen corresponding path program 1 times [2021-11-09 09:34:46,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:46,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204842154] [2021-11-09 09:34:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:46,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:34:46,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:46,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204842154] [2021-11-09 09:34:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204842154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:46,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:46,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:34:46,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75898592] [2021-11-09 09:34:46,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:46,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:46,247 INFO L87 Difference]: Start difference. First operand 24676 states and 31908 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:47,930 INFO L93 Difference]: Finished difference Result 43053 states and 55797 transitions. [2021-11-09 09:34:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:47,953 INFO L225 Difference]: With dead ends: 43053 [2021-11-09 09:34:47,954 INFO L226 Difference]: Without dead ends: 18653 [2021-11-09 09:34:47,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18653 states. [2021-11-09 09:34:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18653 to 18653. [2021-11-09 09:34:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18653 states, 18652 states have (on average 1.2781471155908213) internal successors, (23840), 18652 states have internal predecessors, (23840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18653 states to 18653 states and 23840 transitions. [2021-11-09 09:34:49,588 INFO L78 Accepts]: Start accepts. Automaton has 18653 states and 23840 transitions. Word has length 81 [2021-11-09 09:34:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:49,589 INFO L470 AbstractCegarLoop]: Abstraction has 18653 states and 23840 transitions. [2021-11-09 09:34:49,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18653 states and 23840 transitions. [2021-11-09 09:34:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:34:49,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:49,592 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:49,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:34:49,593 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1097314241, now seen corresponding path program 1 times [2021-11-09 09:34:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:49,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174249972] [2021-11-09 09:34:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:49,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:34:49,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:49,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174249972] [2021-11-09 09:34:49,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174249972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:49,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:34:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988774240] [2021-11-09 09:34:49,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:49,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:49,666 INFO L87 Difference]: Start difference. First operand 18653 states and 23840 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:51,098 INFO L93 Difference]: Finished difference Result 34762 states and 44516 transitions. [2021-11-09 09:34:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 09:34:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:51,116 INFO L225 Difference]: With dead ends: 34762 [2021-11-09 09:34:51,117 INFO L226 Difference]: Without dead ends: 16207 [2021-11-09 09:34:51,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:34:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16207 states. [2021-11-09 09:34:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16207 to 16207. [2021-11-09 09:34:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16207 states, 16206 states have (on average 1.2651487103541899) internal successors, (20503), 16206 states have internal predecessors, (20503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16207 states to 16207 states and 20503 transitions. [2021-11-09 09:34:52,795 INFO L78 Accepts]: Start accepts. Automaton has 16207 states and 20503 transitions. Word has length 81 [2021-11-09 09:34:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 16207 states and 20503 transitions. [2021-11-09 09:34:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16207 states and 20503 transitions. [2021-11-09 09:34:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:34:52,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:52,799 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:52,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:34:52,799 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash -84417319, now seen corresponding path program 1 times [2021-11-09 09:34:52,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:52,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639175752] [2021-11-09 09:34:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:52,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:53,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:53,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639175752] [2021-11-09 09:34:53,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639175752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:53,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057994244] [2021-11-09 09:34:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:53,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:53,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:53,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:34:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:34:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:55,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057994244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:55,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:55,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-11-09 09:34:55,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840854308] [2021-11-09 09:34:55,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:34:55,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:34:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:34:55,563 INFO L87 Difference]: Start difference. First operand 16207 states and 20503 transitions. Second operand has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:21,599 INFO L93 Difference]: Finished difference Result 79342 states and 100550 transitions. [2021-11-09 09:35:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 09:35:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 09:35:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:21,677 INFO L225 Difference]: With dead ends: 79342 [2021-11-09 09:35:21,677 INFO L226 Difference]: Without dead ends: 64700 [2021-11-09 09:35:21,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1642, Invalid=6730, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:35:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64700 states. [2021-11-09 09:35:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64700 to 26625. [2021-11-09 09:35:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26625 states, 26624 states have (on average 1.2646108774038463) internal successors, (33669), 26624 states have internal predecessors, (33669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26625 states to 26625 states and 33669 transitions. [2021-11-09 09:35:25,928 INFO L78 Accepts]: Start accepts. Automaton has 26625 states and 33669 transitions. Word has length 82 [2021-11-09 09:35:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:25,929 INFO L470 AbstractCegarLoop]: Abstraction has 26625 states and 33669 transitions. [2021-11-09 09:35:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26625 states and 33669 transitions. [2021-11-09 09:35:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:35:25,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:25,931 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:25,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:26,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:26,132 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 408357941, now seen corresponding path program 1 times [2021-11-09 09:35:26,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:26,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236315440] [2021-11-09 09:35:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:26,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:26,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:26,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236315440] [2021-11-09 09:35:26,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236315440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:26,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:26,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:35:26,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87432103] [2021-11-09 09:35:26,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:35:26,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:35:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:26,173 INFO L87 Difference]: Start difference. First operand 26625 states and 33669 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:28,376 INFO L93 Difference]: Finished difference Result 39926 states and 50664 transitions. [2021-11-09 09:35:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:35:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 09:35:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:28,392 INFO L225 Difference]: With dead ends: 39926 [2021-11-09 09:35:28,392 INFO L226 Difference]: Without dead ends: 15624 [2021-11-09 09:35:28,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:35:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15624 states. [2021-11-09 09:35:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15624 to 15622. [2021-11-09 09:35:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15622 states, 15621 states have (on average 1.2294347352922348) internal successors, (19205), 15621 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15622 states to 15622 states and 19205 transitions. [2021-11-09 09:35:30,606 INFO L78 Accepts]: Start accepts. Automaton has 15622 states and 19205 transitions. Word has length 82 [2021-11-09 09:35:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:30,606 INFO L470 AbstractCegarLoop]: Abstraction has 15622 states and 19205 transitions. [2021-11-09 09:35:30,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 15622 states and 19205 transitions. [2021-11-09 09:35:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 09:35:30,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:30,609 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:30,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 09:35:30,609 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:30,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 319802689, now seen corresponding path program 1 times [2021-11-09 09:35:30,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:30,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623140047] [2021-11-09 09:35:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:30,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:35:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:30,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623140047] [2021-11-09 09:35:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623140047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:35:30,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:35:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:35:30,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062967966] [2021-11-09 09:35:30,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:35:30,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:35:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:35:30,714 INFO L87 Difference]: Start difference. First operand 15622 states and 19205 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:33,425 INFO L93 Difference]: Finished difference Result 36049 states and 44672 transitions. [2021-11-09 09:35:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:35:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 09:35:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:33,450 INFO L225 Difference]: With dead ends: 36049 [2021-11-09 09:35:33,450 INFO L226 Difference]: Without dead ends: 20495 [2021-11-09 09:35:33,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:35:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2021-11-09 09:35:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 20493. [2021-11-09 09:35:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20493 states, 20492 states have (on average 1.2418016787038844) internal successors, (25447), 20492 states have internal predecessors, (25447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20493 states to 20493 states and 25447 transitions. [2021-11-09 09:35:36,079 INFO L78 Accepts]: Start accepts. Automaton has 20493 states and 25447 transitions. Word has length 82 [2021-11-09 09:35:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:36,079 INFO L470 AbstractCegarLoop]: Abstraction has 20493 states and 25447 transitions. [2021-11-09 09:35:36,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 20493 states and 25447 transitions. [2021-11-09 09:35:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:35:36,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:36,081 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:36,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:35:36,082 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash -441022536, now seen corresponding path program 1 times [2021-11-09 09:35:36,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:36,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029596447] [2021-11-09 09:35:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:36,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:37,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:37,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029596447] [2021-11-09 09:35:37,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029596447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:37,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339217052] [2021-11-09 09:35:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:37,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:37,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:37,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a699be4-df15-40e9-9fef-fee0c27dea02/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:35:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:35:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates...