./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY --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 a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:37:25,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:37:25,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:37:25,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:37:25,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:37:25,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:37:25,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:37:25,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:37:25,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:37:25,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:37:25,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:37:25,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:37:25,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:37:25,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:37:25,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:37:25,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:37:25,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:37:25,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:37:25,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:37:25,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:37:25,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:37:25,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:37:25,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:37:25,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:37:25,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:37:25,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:37:25,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:37:25,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:37:25,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:37:25,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:37:25,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:37:25,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:37:25,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:37:25,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:37:25,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:37:25,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:37:25,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:37:25,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:37:25,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:37:25,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:37:25,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:37:25,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:37:25,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:37:25,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:37:25,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:37:25,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:37:25,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:37:25,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:37:25,349 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:37:25,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:37:25,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:37:25,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:37:25,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:37:25,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:37:25,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:37:25,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:37:25,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:37:25,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:37:25,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:37:25,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:37:25,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:37:25,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:37:25,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:37:25,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:37:25,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:37:25,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:37:25,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:37:25,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:37:25,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:37:25,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:37:25,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:37:25,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:37:25,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:37:25,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:37:25,359 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_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d [2021-11-07 07:37:25,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:37:25,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:37:25,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:37:25,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:37:25,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:37:25,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 07:37:25,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/data/c3a235ec4/7e3b1bd678834e6db99977ba29c87602/FLAGe0cd581e5 [2021-11-07 07:37:26,425 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:37:26,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 07:37:26,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/data/c3a235ec4/7e3b1bd678834e6db99977ba29c87602/FLAGe0cd581e5 [2021-11-07 07:37:26,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/data/c3a235ec4/7e3b1bd678834e6db99977ba29c87602 [2021-11-07 07:37:26,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:37:26,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:37:26,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:37:26,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:37:26,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:37:26,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:37:26" (1/1) ... [2021-11-07 07:37:26,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a146146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:26, skipping insertion in model container [2021-11-07 07:37:26,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:37:26" (1/1) ... [2021-11-07 07:37:26,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:37:26,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:37:27,056 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_c075c775-6207-4fe7-8098-4aaee475c7f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2021-11-07 07:37:27,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:37:27,097 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:37:27,160 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_c075c775-6207-4fe7-8098-4aaee475c7f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2021-11-07 07:37:27,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:37:27,222 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:37:27,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27 WrapperNode [2021-11-07 07:37:27,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:37:27,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:37:27,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:37:27,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:37:27,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:37:27,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:37:27,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:37:27,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:37:27,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:37:27,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:37:27,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:37:27,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:37:27,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (1/1) ... [2021-11-07 07:37:27,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:37:27,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:27,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:37:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:37:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:37:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:37:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:37:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:37:27,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:37:27,958 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:37:27,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:37:27 BoogieIcfgContainer [2021-11-07 07:37:27,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:37:27,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:37:27,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:37:27,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:37:27,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:37:26" (1/3) ... [2021-11-07 07:37:27,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a364e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:37:27, skipping insertion in model container [2021-11-07 07:37:27,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:27" (2/3) ... [2021-11-07 07:37:27,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a364e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:37:27, skipping insertion in model container [2021-11-07 07:37:27,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:37:27" (3/3) ... [2021-11-07 07:37:27,985 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 07:37:27,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:37:27,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:37:28,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:37:28,058 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 [2021-11-07 07:37:28,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:37:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.6705882352941177) internal successors, (142), 86 states have internal predecessors, (142), 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) [2021-11-07 07:37:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:37:28,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:28,092 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] [2021-11-07 07:37:28,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash 716810707, now seen corresponding path program 1 times [2021-11-07 07:37:28,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:28,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152321267] [2021-11-07 07:37:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:28,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:28,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:28,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152321267] [2021-11-07 07:37:28,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152321267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:28,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:28,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:28,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845641900] [2021-11-07 07:37:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:28,541 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.6705882352941177) internal successors, (142), 86 states have internal predecessors, (142), 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 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-07 07:37:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:28,615 INFO L93 Difference]: Finished difference Result 205 states and 324 transitions. [2021-11-07 07:37:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2021-11-07 07:37:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:28,630 INFO L225 Difference]: With dead ends: 205 [2021-11-07 07:37:28,630 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:37:28,633 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 [2021-11-07 07:37:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:37:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-07 07:37:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.503875968992248) internal successors, (194), 129 states have internal predecessors, (194), 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) [2021-11-07 07:37:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 194 transitions. [2021-11-07 07:37:28,683 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 194 transitions. Word has length 38 [2021-11-07 07:37:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:28,683 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 194 transitions. [2021-11-07 07:37:28,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-07 07:37:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 194 transitions. [2021-11-07 07:37:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 07:37:28,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:28,686 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] [2021-11-07 07:37:28,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:37:28,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -935293361, now seen corresponding path program 1 times [2021-11-07 07:37:28,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:28,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748319704] [2021-11-07 07:37:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:28,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:28,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:28,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748319704] [2021-11-07 07:37:28,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748319704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:28,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:28,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:28,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779015591] [2021-11-07 07:37:28,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:28,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:28,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:28,846 INFO L87 Difference]: Start difference. First operand 130 states and 194 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-07 07:37:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:28,931 INFO L93 Difference]: Finished difference Result 318 states and 490 transitions. [2021-11-07 07:37:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:28,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2021-11-07 07:37:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:28,943 INFO L225 Difference]: With dead ends: 318 [2021-11-07 07:37:28,944 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 07:37:28,945 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 [2021-11-07 07:37:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 07:37:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-11-07 07:37:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.526829268292683) internal successors, (313), 205 states have internal predecessors, (313), 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) [2021-11-07 07:37:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2021-11-07 07:37:29,004 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 39 [2021-11-07 07:37:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:29,004 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2021-11-07 07:37:29,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-07 07:37:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2021-11-07 07:37:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:37:29,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:29,007 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] [2021-11-07 07:37:29,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:37:29,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 830312666, now seen corresponding path program 1 times [2021-11-07 07:37:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:29,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567162862] [2021-11-07 07:37:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:29,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:29,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:29,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567162862] [2021-11-07 07:37:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567162862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:29,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:29,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:29,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768397833] [2021-11-07 07:37:29,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:29,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:29,189 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-07 07:37:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:29,375 INFO L93 Difference]: Finished difference Result 688 states and 1068 transitions. [2021-11-07 07:37:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:37:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 40 [2021-11-07 07:37:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:29,382 INFO L225 Difference]: With dead ends: 688 [2021-11-07 07:37:29,382 INFO L226 Difference]: Without dead ends: 502 [2021-11-07 07:37:29,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-07 07:37:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2021-11-07 07:37:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.5472837022132797) internal successors, (769), 497 states have internal predecessors, (769), 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) [2021-11-07 07:37:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 769 transitions. [2021-11-07 07:37:29,477 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 769 transitions. Word has length 40 [2021-11-07 07:37:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:29,478 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 769 transitions. [2021-11-07 07:37:29,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-07 07:37:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 769 transitions. [2021-11-07 07:37:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:37:29,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:29,486 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] [2021-11-07 07:37:29,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:37:29,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 604365756, now seen corresponding path program 1 times [2021-11-07 07:37:29,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:29,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163945148] [2021-11-07 07:37:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:29,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:29,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:29,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163945148] [2021-11-07 07:37:29,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163945148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:29,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013792154] [2021-11-07 07:37:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:29,595 INFO L87 Difference]: Start difference. First operand 498 states and 769 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-07 07:37:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:29,671 INFO L93 Difference]: Finished difference Result 1258 states and 1951 transitions. [2021-11-07 07:37:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:29,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-07 07:37:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:29,678 INFO L225 Difference]: With dead ends: 1258 [2021-11-07 07:37:29,678 INFO L226 Difference]: Without dead ends: 780 [2021-11-07 07:37:29,680 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 [2021-11-07 07:37:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-07 07:37:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2021-11-07 07:37:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.5302445302445302) internal successors, (1189), 777 states have internal predecessors, (1189), 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) [2021-11-07 07:37:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1189 transitions. [2021-11-07 07:37:29,762 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1189 transitions. Word has length 41 [2021-11-07 07:37:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:29,763 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1189 transitions. [2021-11-07 07:37:29,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-07 07:37:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1189 transitions. [2021-11-07 07:37:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:37:29,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:29,766 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] [2021-11-07 07:37:29,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:37:29,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 608060849, now seen corresponding path program 1 times [2021-11-07 07:37:29,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:29,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136452734] [2021-11-07 07:37:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:29,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:29,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:29,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136452734] [2021-11-07 07:37:29,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136452734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:29,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:29,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:29,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728220589] [2021-11-07 07:37:29,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:29,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:29,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:29,854 INFO L87 Difference]: Start difference. First operand 778 states and 1189 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-07 07:37:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:30,101 INFO L93 Difference]: Finished difference Result 2066 states and 3175 transitions. [2021-11-07 07:37:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:37:30,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 42 [2021-11-07 07:37:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:30,120 INFO L225 Difference]: With dead ends: 2066 [2021-11-07 07:37:30,120 INFO L226 Difference]: Without dead ends: 1308 [2021-11-07 07:37:30,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:37:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-07 07:37:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1306. [2021-11-07 07:37:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 1.5210727969348659) internal successors, (1985), 1305 states have internal predecessors, (1985), 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) [2021-11-07 07:37:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1985 transitions. [2021-11-07 07:37:30,251 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1985 transitions. Word has length 42 [2021-11-07 07:37:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:30,252 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 1985 transitions. [2021-11-07 07:37:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-11-07 07:37:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1985 transitions. [2021-11-07 07:37:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:37:30,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:30,254 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] [2021-11-07 07:37:30,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:37:30,255 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1912062484, now seen corresponding path program 1 times [2021-11-07 07:37:30,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:30,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333857441] [2021-11-07 07:37:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:30,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333857441] [2021-11-07 07:37:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333857441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:30,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:30,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:30,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237302361] [2021-11-07 07:37:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:30,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:30,383 INFO L87 Difference]: Start difference. First operand 1306 states and 1985 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2021-11-07 07:37:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:30,754 INFO L93 Difference]: Finished difference Result 5490 states and 8373 transitions. [2021-11-07 07:37:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:37:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 42 [2021-11-07 07:37:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:30,794 INFO L225 Difference]: With dead ends: 5490 [2021-11-07 07:37:30,794 INFO L226 Difference]: Without dead ends: 4204 [2021-11-07 07:37:30,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:37:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-11-07 07:37:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 2590. [2021-11-07 07:37:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 1.4943993820007726) internal successors, (3869), 2589 states have internal predecessors, (3869), 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) [2021-11-07 07:37:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3869 transitions. [2021-11-07 07:37:31,103 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3869 transitions. Word has length 42 [2021-11-07 07:37:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:31,103 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 3869 transitions. [2021-11-07 07:37:31,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2021-11-07 07:37:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3869 transitions. [2021-11-07 07:37:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:37:31,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:31,107 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] [2021-11-07 07:37:31,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:37:31,107 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash 836148826, now seen corresponding path program 1 times [2021-11-07 07:37:31,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:31,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762781266] [2021-11-07 07:37:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:31,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:31,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:31,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762781266] [2021-11-07 07:37:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762781266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:31,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:31,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:31,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786640590] [2021-11-07 07:37:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:31,237 INFO L87 Difference]: Start difference. First operand 2590 states and 3869 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2021-11-07 07:37:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:31,775 INFO L93 Difference]: Finished difference Result 5320 states and 7878 transitions. [2021-11-07 07:37:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:37:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 43 [2021-11-07 07:37:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:31,807 INFO L225 Difference]: With dead ends: 5320 [2021-11-07 07:37:31,807 INFO L226 Difference]: Without dead ends: 5318 [2021-11-07 07:37:31,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:37:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2021-11-07 07:37:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 2750. [2021-11-07 07:37:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.46562386322299) internal successors, (4029), 2749 states have internal predecessors, (4029), 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) [2021-11-07 07:37:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4029 transitions. [2021-11-07 07:37:32,137 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4029 transitions. Word has length 43 [2021-11-07 07:37:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:32,138 INFO L470 AbstractCegarLoop]: Abstraction has 2750 states and 4029 transitions. [2021-11-07 07:37:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2021-11-07 07:37:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4029 transitions. [2021-11-07 07:37:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:37:32,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:32,139 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] [2021-11-07 07:37:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:37:32,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash 161382844, now seen corresponding path program 1 times [2021-11-07 07:37:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:32,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157095813] [2021-11-07 07:37:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:32,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:32,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:32,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157095813] [2021-11-07 07:37:32,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157095813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:32,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:32,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:32,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458120327] [2021-11-07 07:37:32,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:32,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:32,181 INFO L87 Difference]: Start difference. First operand 2750 states and 4029 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-07 07:37:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:32,539 INFO L93 Difference]: Finished difference Result 6192 states and 9053 transitions. [2021-11-07 07:37:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2021-11-07 07:37:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:32,560 INFO L225 Difference]: With dead ends: 6192 [2021-11-07 07:37:32,560 INFO L226 Difference]: Without dead ends: 3462 [2021-11-07 07:37:32,565 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 [2021-11-07 07:37:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-11-07 07:37:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 3440. [2021-11-07 07:37:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.4489677231753417) internal successors, (4983), 3439 states have internal predecessors, (4983), 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) [2021-11-07 07:37:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4983 transitions. [2021-11-07 07:37:32,977 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4983 transitions. Word has length 44 [2021-11-07 07:37:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:32,978 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4983 transitions. [2021-11-07 07:37:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-07 07:37:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4983 transitions. [2021-11-07 07:37:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:32,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:32,983 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] [2021-11-07 07:37:32,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:37:32,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1477612707, now seen corresponding path program 1 times [2021-11-07 07:37:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:32,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21368645] [2021-11-07 07:37:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:32,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:33,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:33,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21368645] [2021-11-07 07:37:33,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21368645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:33,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:33,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:33,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479225576] [2021-11-07 07:37:33,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:33,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:33,074 INFO L87 Difference]: Start difference. First operand 3440 states and 4983 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 07:37:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:33,580 INFO L93 Difference]: Finished difference Result 8581 states and 12443 transitions. [2021-11-07 07:37:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 07:37:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:33,614 INFO L225 Difference]: With dead ends: 8581 [2021-11-07 07:37:33,614 INFO L226 Difference]: Without dead ends: 5763 [2021-11-07 07:37:33,619 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 [2021-11-07 07:37:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-11-07 07:37:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 5761. [2021-11-07 07:37:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 1.4314236111111112) internal successors, (8245), 5760 states have internal predecessors, (8245), 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) [2021-11-07 07:37:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8245 transitions. [2021-11-07 07:37:34,257 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8245 transitions. Word has length 63 [2021-11-07 07:37:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:34,257 INFO L470 AbstractCegarLoop]: Abstraction has 5761 states and 8245 transitions. [2021-11-07 07:37:34,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 07:37:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8245 transitions. [2021-11-07 07:37:34,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:34,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:34,262 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:37:34,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:37:34,262 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1700716252, now seen corresponding path program 1 times [2021-11-07 07:37:34,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:34,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232726940] [2021-11-07 07:37:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:34,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:34,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232726940] [2021-11-07 07:37:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232726940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:34,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126701685] [2021-11-07 07:37:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:34,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:34,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:34,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:37:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:37:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:37:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126701685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:35,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-07 07:37:35,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589754724] [2021-11-07 07:37:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:37:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:37:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:37:35,160 INFO L87 Difference]: Start difference. First operand 5761 states and 8245 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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) [2021-11-07 07:37:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:42,423 INFO L93 Difference]: Finished difference Result 30453 states and 42589 transitions. [2021-11-07 07:37:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:37:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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 63 [2021-11-07 07:37:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:42,518 INFO L225 Difference]: With dead ends: 30453 [2021-11-07 07:37:42,518 INFO L226 Difference]: Without dead ends: 25227 [2021-11-07 07:37:42,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:37:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25227 states. [2021-11-07 07:37:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25227 to 14019. [2021-11-07 07:37:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14019 states, 14018 states have (on average 1.3997717220716221) internal successors, (19622), 14018 states have internal predecessors, (19622), 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) [2021-11-07 07:37:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14019 states to 14019 states and 19622 transitions. [2021-11-07 07:37:44,387 INFO L78 Accepts]: Start accepts. Automaton has 14019 states and 19622 transitions. Word has length 63 [2021-11-07 07:37:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 14019 states and 19622 transitions. [2021-11-07 07:37:44,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 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) [2021-11-07 07:37:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14019 states and 19622 transitions. [2021-11-07 07:37:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:44,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:44,394 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] [2021-11-07 07:37:44,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:44,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c075c775-6207-4fe7-8098-4aaee475c7f9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:37:44,619 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:44,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1091273178, now seen corresponding path program 1 times [2021-11-07 07:37:44,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:44,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555456060] [2021-11-07 07:37:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:44,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:37:44,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:44,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555456060] [2021-11-07 07:37:44,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555456060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:44,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:44,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:44,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489387927] [2021-11-07 07:37:44,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:44,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:44,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:44,696 INFO L87 Difference]: Start difference. First operand 14019 states and 19622 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-07 07:37:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:46,438 INFO L93 Difference]: Finished difference Result 25395 states and 35841 transitions. [2021-11-07 07:37:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:37:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 63 [2021-11-07 07:37:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:46,483 INFO L225 Difference]: With dead ends: 25395 [2021-11-07 07:37:46,484 INFO L226 Difference]: Without dead ends: 19428 [2021-11-07 07:37:46,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:37:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2021-11-07 07:37:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 18128. [2021-11-07 07:37:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18127 states have (on average 1.395211562862029) internal successors, (25291), 18127 states have internal predecessors, (25291), 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) [2021-11-07 07:37:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 25291 transitions. [2021-11-07 07:37:48,303 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 25291 transitions. Word has length 63 [2021-11-07 07:37:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:48,304 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 25291 transitions. [2021-11-07 07:37:48,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-07 07:37:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 25291 transitions. [2021-11-07 07:37:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:48,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:48,309 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] [2021-11-07 07:37:48,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:37:48,310 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1327011341, now seen corresponding path program 1 times [2021-11-07 07:37:48,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:48,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446135633] [2021-11-07 07:37:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:48,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:48,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:48,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446135633] [2021-11-07 07:37:48,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446135633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:48,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:48,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:37:48,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505632506] [2021-11-07 07:37:48,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:37:48,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:37:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:37:48,357 INFO L87 Difference]: Start difference. First operand 18128 states and 25291 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 07:37:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:50,365 INFO L93 Difference]: Finished difference Result 31507 states and 43867 transitions. [2021-11-07 07:37:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:37:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 07:37:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:50,417 INFO L225 Difference]: With dead ends: 31507 [2021-11-07 07:37:50,417 INFO L226 Difference]: Without dead ends: 19004 [2021-11-07 07:37:50,441 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 [2021-11-07 07:37:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19004 states. [2021-11-07 07:37:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19004 to 18235. [2021-11-07 07:37:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18235 states, 18234 states have (on average 1.3704617747065921) internal successors, (24989), 18234 states have internal predecessors, (24989), 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) [2021-11-07 07:37:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18235 states to 18235 states and 24989 transitions. [2021-11-07 07:37:52,342 INFO L78 Accepts]: Start accepts. Automaton has 18235 states and 24989 transitions. Word has length 63 [2021-11-07 07:37:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:52,343 INFO L470 AbstractCegarLoop]: Abstraction has 18235 states and 24989 transitions. [2021-11-07 07:37:52,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 07:37:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 18235 states and 24989 transitions. [2021-11-07 07:37:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:52,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:52,348 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] [2021-11-07 07:37:52,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:37:52,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash 161019487, now seen corresponding path program 1 times [2021-11-07 07:37:52,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:52,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052883079] [2021-11-07 07:37:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:52,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:37:52,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:52,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052883079] [2021-11-07 07:37:52,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052883079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:52,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:52,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:37:52,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316097196] [2021-11-07 07:37:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:52,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:52,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:52,402 INFO L87 Difference]: Start difference. First operand 18235 states and 24989 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-07 07:37:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:55,047 INFO L93 Difference]: Finished difference Result 45348 states and 61896 transitions. [2021-11-07 07:37:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:37:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 63 [2021-11-07 07:37:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:55,117 INFO L225 Difference]: With dead ends: 45348 [2021-11-07 07:37:55,117 INFO L226 Difference]: Without dead ends: 27200 [2021-11-07 07:37:55,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:37:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27200 states. [2021-11-07 07:37:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27200 to 27012. [2021-11-07 07:37:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27012 states, 27011 states have (on average 1.352893265706564) internal successors, (36543), 27011 states have internal predecessors, (36543), 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) [2021-11-07 07:37:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 36543 transitions. [2021-11-07 07:37:57,924 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 36543 transitions. Word has length 63 [2021-11-07 07:37:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 27012 states and 36543 transitions. [2021-11-07 07:37:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-11-07 07:37:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 36543 transitions. [2021-11-07 07:37:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:37:57,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:57,930 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] [2021-11-07 07:37:57,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:37:57,930 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1235936444, now seen corresponding path program 1 times [2021-11-07 07:37:57,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:57,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549836078] [2021-11-07 07:37:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:57,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:37:57,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:57,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549836078] [2021-11-07 07:37:57,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549836078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:37:57,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:37:57,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:37:57,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385785949] [2021-11-07 07:37:57,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:37:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:37:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:37:57,993 INFO L87 Difference]: Start difference. First operand 27012 states and 36543 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-07 07:38:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:01,149 INFO L93 Difference]: Finished difference Result 36706 states and 50134 transitions. [2021-11-07 07:38:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:01,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 63 [2021-11-07 07:38:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:01,211 INFO L225 Difference]: With dead ends: 36706 [2021-11-07 07:38:01,211 INFO L226 Difference]: Without dead ends: 33579 [2021-11-07 07:38:01,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2021-11-07 07:38:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 30041. [2021-11-07 07:38:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30041 states, 30040 states have (on average 1.3554260985352864) internal successors, (40717), 30040 states have internal predecessors, (40717), 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) [2021-11-07 07:38:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30041 states to 30041 states and 40717 transitions. [2021-11-07 07:38:04,124 INFO L78 Accepts]: Start accepts. Automaton has 30041 states and 40717 transitions. Word has length 63 [2021-11-07 07:38:04,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:04,124 INFO L470 AbstractCegarLoop]: Abstraction has 30041 states and 40717 transitions. [2021-11-07 07:38:04,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-07 07:38:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30041 states and 40717 transitions. [2021-11-07 07:38:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:38:04,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:04,131 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:38:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:38:04,132 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1004794437, now seen corresponding path program 1 times [2021-11-07 07:38:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:04,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210052131] [2021-11-07 07:38:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:04,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:04,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:04,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210052131] [2021-11-07 07:38:04,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210052131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:04,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:04,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:04,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200123598] [2021-11-07 07:38:04,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:04,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:04,172 INFO L87 Difference]: Start difference. First operand 30041 states and 40717 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 07:38:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:06,908 INFO L93 Difference]: Finished difference Result 43301 states and 58448 transitions. [2021-11-07 07:38:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 07:38:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:06,956 INFO L225 Difference]: With dead ends: 43301 [2021-11-07 07:38:06,956 INFO L226 Difference]: Without dead ends: 26532 [2021-11-07 07:38:06,976 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 [2021-11-07 07:38:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26532 states. [2021-11-07 07:38:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26532 to 26481. [2021-11-07 07:38:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26481 states, 26480 states have (on average 1.341880664652568) internal successors, (35533), 26480 states have internal predecessors, (35533), 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) [2021-11-07 07:38:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26481 states to 26481 states and 35533 transitions. [2021-11-07 07:38:09,718 INFO L78 Accepts]: Start accepts. Automaton has 26481 states and 35533 transitions. Word has length 64 [2021-11-07 07:38:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:09,719 INFO L470 AbstractCegarLoop]: Abstraction has 26481 states and 35533 transitions. [2021-11-07 07:38:09,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 07:38:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 26481 states and 35533 transitions. [2021-11-07 07:38:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:38:09,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:09,725 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:38:09,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:38:09,726 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1607670003, now seen corresponding path program 1 times [2021-11-07 07:38:09,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:09,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900539446] [2021-11-07 07:38:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:09,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:38:09,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:09,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900539446] [2021-11-07 07:38:09,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900539446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:09,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:09,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:09,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591124106] [2021-11-07 07:38:09,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:09,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:09,789 INFO L87 Difference]: Start difference. First operand 26481 states and 35533 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-07 07:38:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:12,979 INFO L93 Difference]: Finished difference Result 34588 states and 46719 transitions. [2021-11-07 07:38:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 65 [2021-11-07 07:38:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:13,016 INFO L225 Difference]: With dead ends: 34588 [2021-11-07 07:38:13,016 INFO L226 Difference]: Without dead ends: 30307 [2021-11-07 07:38:13,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30307 states. [2021-11-07 07:38:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30307 to 29245. [2021-11-07 07:38:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29245 states, 29244 states have (on average 1.3398645876077144) internal successors, (39183), 29244 states have internal predecessors, (39183), 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) [2021-11-07 07:38:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29245 states to 29245 states and 39183 transitions. [2021-11-07 07:38:15,756 INFO L78 Accepts]: Start accepts. Automaton has 29245 states and 39183 transitions. Word has length 65 [2021-11-07 07:38:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 29245 states and 39183 transitions. [2021-11-07 07:38:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-07 07:38:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29245 states and 39183 transitions. [2021-11-07 07:38:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:38:15,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:15,764 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] [2021-11-07 07:38:15,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:38:15,765 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 254858913, now seen corresponding path program 1 times [2021-11-07 07:38:15,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:15,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065459005] [2021-11-07 07:38:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:15,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:15,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:15,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065459005] [2021-11-07 07:38:15,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065459005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:15,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:15,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670257463] [2021-11-07 07:38:15,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:15,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:15,806 INFO L87 Difference]: Start difference. First operand 29245 states and 39183 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 07:38:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:19,742 INFO L93 Difference]: Finished difference Result 59514 states and 79656 transitions. [2021-11-07 07:38:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 07:38:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:19,793 INFO L225 Difference]: With dead ends: 59514 [2021-11-07 07:38:19,794 INFO L226 Difference]: Without dead ends: 38877 [2021-11-07 07:38:19,811 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 [2021-11-07 07:38:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38877 states.