./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.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_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/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_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/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_b1370e94-b380-4a2b-a43e-03adf2aee192/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 71881827e42af7e93d8d7789f21cf70c42c80b5b7128690239afcf02ba9daf37 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:09:44,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:09:44,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:09:44,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:09:44,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:09:44,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:09:44,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:09:44,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:09:44,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:09:44,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:09:44,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:09:44,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:09:44,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:09:44,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:09:44,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:09:44,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:09:44,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:09:44,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:09:44,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:09:44,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:09:44,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:09:44,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:09:44,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:09:44,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:09:44,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:09:44,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:09:44,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:09:44,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:09:44,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:09:44,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:09:44,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:09:44,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:09:44,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:09:44,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:09:44,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:09:44,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:09:44,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:09:44,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:09:44,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:09:44,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:09:44,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:09:44,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:09:44,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:09:44,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:09:44,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:09:44,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:09:44,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:09:44,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:09:44,401 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:09:44,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:09:44,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:09:44,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:09:44,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:09:44,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:09:44,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:09:44,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:09:44,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:09:44,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:09:44,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:09:44,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:09:44,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:09:44,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:09:44,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:09:44,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:09:44,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:44,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:09:44,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:09:44,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:09:44,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:09:44,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:09:44,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:09:44,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:09:44,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:09:44,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:09:44,413 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_b1370e94-b380-4a2b-a43e-03adf2aee192/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71881827e42af7e93d8d7789f21cf70c42c80b5b7128690239afcf02ba9daf37 [2021-11-07 08:09:44,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:09:44,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:09:44,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:09:44,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:09:44,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:09:44,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-07 08:09:44,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/data/464ae5ee4/a5d3933e76254dd1a7bd982fc4828301/FLAG03f344e48 [2021-11-07 08:09:45,554 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:09:45,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-07 08:09:45,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/data/464ae5ee4/a5d3933e76254dd1a7bd982fc4828301/FLAG03f344e48 [2021-11-07 08:09:45,866 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/data/464ae5ee4/a5d3933e76254dd1a7bd982fc4828301 [2021-11-07 08:09:45,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:09:45,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:09:45,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:45,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:09:45,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:09:45,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:45" (1/1) ... [2021-11-07 08:09:45,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391b0f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:45, skipping insertion in model container [2021-11-07 08:09:45,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:45" (1/1) ... [2021-11-07 08:09:45,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:09:45,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:09:46,181 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_b1370e94-b380-4a2b-a43e-03adf2aee192/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2021-11-07 08:09:46,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:46,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:09:46,299 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_b1370e94-b380-4a2b-a43e-03adf2aee192/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2021-11-07 08:09:46,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:46,347 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:09:46,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46 WrapperNode [2021-11-07 08:09:46,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:46,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:46,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:09:46,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:09:46,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:46,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:09:46,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:09:46,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:09:46,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:09:46,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:09:46,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:09:46,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:09:46,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (1/1) ... [2021-11-07 08:09:46,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:46,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:09:46,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1370e94-b380-4a2b-a43e-03adf2aee192/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:09:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:09:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:09:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:09:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:09:47,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:09:47,472 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-07 08:09:47,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:47 BoogieIcfgContainer [2021-11-07 08:09:47,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:09:47,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:09:47,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:09:47,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:09:47,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:09:45" (1/3) ... [2021-11-07 08:09:47,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7120f196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:47, skipping insertion in model container [2021-11-07 08:09:47,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:46" (2/3) ... [2021-11-07 08:09:47,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7120f196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:47, skipping insertion in model container [2021-11-07 08:09:47,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:47" (3/3) ... [2021-11-07 08:09:47,487 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-07 08:09:47,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:09:47,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:09:47,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:09:47,567 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 08:09:47,568 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:09:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 1.7431192660550459) internal successors, (190), 110 states have internal predecessors, (190), 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 08:09:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:09:47,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:47,597 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] [2021-11-07 08:09:47,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2021-11-07 08:09:47,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:47,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289792442] [2021-11-07 08:09:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:47,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:47,877 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 08:09:47,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:47,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289792442] [2021-11-07 08:09:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289792442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:47,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:47,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:47,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051079921] [2021-11-07 08:09:47,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:09:47,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:09:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:47,910 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 1.7431192660550459) internal successors, (190), 110 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 08:09:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:47,990 INFO L93 Difference]: Finished difference Result 173 states and 291 transitions. [2021-11-07 08:09:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:09:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-07 08:09:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:48,034 INFO L225 Difference]: With dead ends: 173 [2021-11-07 08:09:48,034 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 08:09:48,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 08:09:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 08:09:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.7264150943396226) internal successors, (183), 106 states have internal predecessors, (183), 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 08:09:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 183 transitions. [2021-11-07 08:09:48,094 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 183 transitions. Word has length 37 [2021-11-07 08:09:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 183 transitions. [2021-11-07 08:09:48,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 08:09:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 183 transitions. [2021-11-07 08:09:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:09:48,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:48,099 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] [2021-11-07 08:09:48,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:09:48,100 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2021-11-07 08:09:48,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:48,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686659] [2021-11-07 08:09:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:48,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:48,262 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 08:09:48,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:48,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686659] [2021-11-07 08:09:48,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:48,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:48,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:09:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697900398] [2021-11-07 08:09:48,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:48,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:48,276 INFO L87 Difference]: Start difference. First operand 107 states and 183 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 08:09:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:48,468 INFO L93 Difference]: Finished difference Result 172 states and 284 transitions. [2021-11-07 08:09:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-11-07 08:09:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:48,472 INFO L225 Difference]: With dead ends: 172 [2021-11-07 08:09:48,472 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 08:09:48,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 08:09:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 08:09:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.349056603773585) internal successors, (143), 106 states have internal predecessors, (143), 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 08:09:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2021-11-07 08:09:48,488 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 37 [2021-11-07 08:09:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:48,488 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2021-11-07 08:09:48,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 08:09:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2021-11-07 08:09:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:48,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:48,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:48,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:09:48,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2021-11-07 08:09:48,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:48,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026192626] [2021-11-07 08:09:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:48,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:48,730 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 08:09:48,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:48,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026192626] [2021-11-07 08:09:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026192626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:48,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:48,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:48,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604362626] [2021-11-07 08:09:48,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:48,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:48,735 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:48,786 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2021-11-07 08:09:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:48,794 INFO L225 Difference]: With dead ends: 223 [2021-11-07 08:09:48,795 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 08:09:48,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 08:09:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-11-07 08:09:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.4339622641509433) internal successors, (228), 159 states have internal predecessors, (228), 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 08:09:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 228 transitions. [2021-11-07 08:09:48,827 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 228 transitions. Word has length 76 [2021-11-07 08:09:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:48,828 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 228 transitions. [2021-11-07 08:09:48,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 228 transitions. [2021-11-07 08:09:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:48,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:48,833 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:09:48,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2021-11-07 08:09:48,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:48,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726960227] [2021-11-07 08:09:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:49,060 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 08:09:49,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:49,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726960227] [2021-11-07 08:09:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726960227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:49,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:49,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:49,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209886622] [2021-11-07 08:09:49,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:49,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:49,065 INFO L87 Difference]: Start difference. First operand 160 states and 228 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:49,120 INFO L93 Difference]: Finished difference Result 376 states and 572 transitions. [2021-11-07 08:09:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:49,143 INFO L225 Difference]: With dead ends: 376 [2021-11-07 08:09:49,143 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 08:09:49,144 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 08:09:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 08:09:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-11-07 08:09:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.494208494208494) internal successors, (387), 259 states have internal predecessors, (387), 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 08:09:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 387 transitions. [2021-11-07 08:09:49,186 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 387 transitions. Word has length 76 [2021-11-07 08:09:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:49,187 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 387 transitions. [2021-11-07 08:09:49,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 387 transitions. [2021-11-07 08:09:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:49,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:49,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:49,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:09:49,192 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2021-11-07 08:09:49,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:49,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722698317] [2021-11-07 08:09:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:49,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:49,278 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 08:09:49,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:49,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722698317] [2021-11-07 08:09:49,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722698317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:49,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:49,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:49,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792839336] [2021-11-07 08:09:49,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:49,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:49,282 INFO L87 Difference]: Start difference. First operand 260 states and 387 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:49,322 INFO L93 Difference]: Finished difference Result 664 states and 1029 transitions. [2021-11-07 08:09:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:49,327 INFO L225 Difference]: With dead ends: 664 [2021-11-07 08:09:49,328 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 08:09:49,330 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 08:09:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 08:09:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2021-11-07 08:09:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.5279642058165548) internal successors, (683), 447 states have internal predecessors, (683), 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 08:09:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 683 transitions. [2021-11-07 08:09:49,411 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 683 transitions. Word has length 76 [2021-11-07 08:09:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:49,412 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 683 transitions. [2021-11-07 08:09:49,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 683 transitions. [2021-11-07 08:09:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:49,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:49,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:49,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:09:49,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2021-11-07 08:09:49,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:49,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124836416] [2021-11-07 08:09:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:49,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:49,516 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 08:09:49,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:49,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124836416] [2021-11-07 08:09:49,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124836416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:49,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:49,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:49,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922493689] [2021-11-07 08:09:49,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:49,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:49,527 INFO L87 Difference]: Start difference. First operand 448 states and 683 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:49,620 INFO L93 Difference]: Finished difference Result 1204 states and 1877 transitions. [2021-11-07 08:09:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:49,637 INFO L225 Difference]: With dead ends: 1204 [2021-11-07 08:09:49,639 INFO L226 Difference]: Without dead ends: 802 [2021-11-07 08:09:49,640 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 08:09:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-07 08:09:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 800. [2021-11-07 08:09:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.5406758448060076) internal successors, (1231), 799 states have internal predecessors, (1231), 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 08:09:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1231 transitions. [2021-11-07 08:09:49,701 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1231 transitions. Word has length 76 [2021-11-07 08:09:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:49,702 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1231 transitions. [2021-11-07 08:09:49,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1231 transitions. [2021-11-07 08:09:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:49,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:49,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:49,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:09:49,705 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2021-11-07 08:09:49,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:49,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401343018] [2021-11-07 08:09:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:49,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:49,823 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 08:09:49,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:49,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401343018] [2021-11-07 08:09:49,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401343018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:49,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:49,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:49,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786297735] [2021-11-07 08:09:49,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:49,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:49,830 INFO L87 Difference]: Start difference. First operand 800 states and 1231 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:49,915 INFO L93 Difference]: Finished difference Result 2212 states and 3441 transitions. [2021-11-07 08:09:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:49,929 INFO L225 Difference]: With dead ends: 2212 [2021-11-07 08:09:49,930 INFO L226 Difference]: Without dead ends: 1458 [2021-11-07 08:09:49,932 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 08:09:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-07 08:09:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1456. [2021-11-07 08:09:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 1.538831615120275) internal successors, (2239), 1455 states have internal predecessors, (2239), 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 08:09:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2239 transitions. [2021-11-07 08:09:50,031 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2239 transitions. Word has length 76 [2021-11-07 08:09:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:50,032 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2239 transitions. [2021-11-07 08:09:50,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2239 transitions. [2021-11-07 08:09:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:09:50,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:50,047 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:50,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:09:50,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2021-11-07 08:09:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:50,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318522862] [2021-11-07 08:09:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:50,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:50,356 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 08:09:50,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318522862] [2021-11-07 08:09:50,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318522862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:50,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:50,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:09:50,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115358873] [2021-11-07 08:09:50,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:09:50,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:09:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:50,366 INFO L87 Difference]: Start difference. First operand 1456 states and 2239 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:51,580 INFO L93 Difference]: Finished difference Result 16966 states and 26362 transitions. [2021-11-07 08:09:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:09:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:09:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:51,702 INFO L225 Difference]: With dead ends: 16966 [2021-11-07 08:09:51,703 INFO L226 Difference]: Without dead ends: 15556 [2021-11-07 08:09:51,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:09:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15556 states. [2021-11-07 08:09:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15556 to 2864. [2021-11-07 08:09:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2863 states have (on average 1.525323087670276) internal successors, (4367), 2863 states have internal predecessors, (4367), 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 08:09:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4367 transitions. [2021-11-07 08:09:52,215 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4367 transitions. Word has length 76 [2021-11-07 08:09:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 2864 states and 4367 transitions. [2021-11-07 08:09:52,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4367 transitions. [2021-11-07 08:09:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:09:52,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:52,218 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:52,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:09:52,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2021-11-07 08:09:52,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:52,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676630973] [2021-11-07 08:09:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:52,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:52,307 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 08:09:52,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:52,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676630973] [2021-11-07 08:09:52,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676630973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:52,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:52,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:52,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437825167] [2021-11-07 08:09:52,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:52,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:52,312 INFO L87 Difference]: Start difference. First operand 2864 states and 4367 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:52,785 INFO L93 Difference]: Finished difference Result 8148 states and 12401 transitions. [2021-11-07 08:09:52,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:52,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 08:09:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:52,853 INFO L225 Difference]: With dead ends: 8148 [2021-11-07 08:09:52,853 INFO L226 Difference]: Without dead ends: 5330 [2021-11-07 08:09:52,859 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 08:09:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2021-11-07 08:09:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 5264. [2021-11-07 08:09:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.4924947748432453) internal successors, (7855), 5263 states have internal predecessors, (7855), 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 08:09:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7855 transitions. [2021-11-07 08:09:53,415 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7855 transitions. Word has length 78 [2021-11-07 08:09:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:53,415 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 7855 transitions. [2021-11-07 08:09:53,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7855 transitions. [2021-11-07 08:09:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:09:53,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:53,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:53,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:09:53,417 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2021-11-07 08:09:53,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:53,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811574863] [2021-11-07 08:09:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:53,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:53,933 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 08:09:53,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:53,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811574863] [2021-11-07 08:09:53,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811574863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:53,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:53,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:09:53,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135750226] [2021-11-07 08:09:53,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:09:53,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:09:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:53,939 INFO L87 Difference]: Start difference. First operand 5264 states and 7855 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:55,322 INFO L93 Difference]: Finished difference Result 18266 states and 27476 transitions. [2021-11-07 08:09:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:09:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 08:09:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:55,359 INFO L225 Difference]: With dead ends: 18266 [2021-11-07 08:09:55,359 INFO L226 Difference]: Without dead ends: 13048 [2021-11-07 08:09:55,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:09:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2021-11-07 08:09:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 5264. [2021-11-07 08:09:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.480334410032301) internal successors, (7791), 5263 states have internal predecessors, (7791), 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 08:09:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7791 transitions. [2021-11-07 08:09:56,011 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7791 transitions. Word has length 78 [2021-11-07 08:09:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:56,012 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 7791 transitions. [2021-11-07 08:09:56,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7791 transitions. [2021-11-07 08:09:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:09:56,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:56,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:56,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:09:56,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2021-11-07 08:09:56,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:56,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647120795] [2021-11-07 08:09:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:56,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:56,153 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 08:09:56,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:56,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647120795] [2021-11-07 08:09:56,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647120795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:56,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:56,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:09:56,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421391136] [2021-11-07 08:09:56,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:09:56,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:09:56,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:56,158 INFO L87 Difference]: Start difference. First operand 5264 states and 7791 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:57,276 INFO L93 Difference]: Finished difference Result 9170 states and 13482 transitions. [2021-11-07 08:09:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:09:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 08:09:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:57,303 INFO L225 Difference]: With dead ends: 9170 [2021-11-07 08:09:57,303 INFO L226 Difference]: Without dead ends: 9168 [2021-11-07 08:09:57,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:09:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2021-11-07 08:09:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 5456. [2021-11-07 08:09:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5456 states, 5455 states have (on average 1.4575618698441797) internal successors, (7951), 5455 states have internal predecessors, (7951), 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 08:09:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5456 states to 5456 states and 7951 transitions. [2021-11-07 08:09:58,025 INFO L78 Accepts]: Start accepts. Automaton has 5456 states and 7951 transitions. Word has length 79 [2021-11-07 08:09:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:58,026 INFO L470 AbstractCegarLoop]: Abstraction has 5456 states and 7951 transitions. [2021-11-07 08:09:58,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5456 states and 7951 transitions. [2021-11-07 08:09:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:09:58,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:58,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:58,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:09:58,029 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2021-11-07 08:09:58,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:58,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058187146] [2021-11-07 08:09:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:58,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,103 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 08:09:58,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:58,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058187146] [2021-11-07 08:09:58,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058187146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:58,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:58,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:58,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429704984] [2021-11-07 08:09:58,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:58,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:58,109 INFO L87 Difference]: Start difference. First operand 5456 states and 7951 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:58,863 INFO L93 Difference]: Finished difference Result 10967 states and 16085 transitions. [2021-11-07 08:09:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 08:09:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:58,888 INFO L225 Difference]: With dead ends: 10967 [2021-11-07 08:09:58,888 INFO L226 Difference]: Without dead ends: 7956 [2021-11-07 08:09:58,894 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 08:09:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2021-11-07 08:09:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 7954. [2021-11-07 08:09:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 1.450647554381994) internal successors, (11537), 7953 states have internal predecessors, (11537), 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 08:09:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 11537 transitions. [2021-11-07 08:09:59,615 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 11537 transitions. Word has length 80 [2021-11-07 08:09:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:59,616 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 11537 transitions. [2021-11-07 08:09:59,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 11537 transitions. [2021-11-07 08:09:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:09:59,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:59,624 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:59,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:09:59,624 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2045123054, now seen corresponding path program 1 times [2021-11-07 08:09:59,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:59,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837072588] [2021-11-07 08:09:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:59,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 08:09:59,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:59,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837072588] [2021-11-07 08:09:59,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837072588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:59,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:59,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:09:59,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298579866] [2021-11-07 08:09:59,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:09:59,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:09:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:59,803 INFO L87 Difference]: Start difference. First operand 7954 states and 11537 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 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 08:10:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:03,225 INFO L93 Difference]: Finished difference Result 56960 states and 82664 transitions. [2021-11-07 08:10:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 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 110 [2021-11-07 08:10:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:03,384 INFO L225 Difference]: With dead ends: 56960 [2021-11-07 08:10:03,384 INFO L226 Difference]: Without dead ends: 49054 [2021-11-07 08:10:03,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49054 states. [2021-11-07 08:10:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49054 to 15858. [2021-11-07 08:10:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15858 states, 15857 states have (on average 1.4459859998738727) internal successors, (22929), 15857 states have internal predecessors, (22929), 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 08:10:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 22929 transitions. [2021-11-07 08:10:05,545 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 22929 transitions. Word has length 110 [2021-11-07 08:10:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:05,546 INFO L470 AbstractCegarLoop]: Abstraction has 15858 states and 22929 transitions. [2021-11-07 08:10:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 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 08:10:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 22929 transitions. [2021-11-07 08:10:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:10:05,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:05,554 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:05,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:10:05,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 276340238, now seen corresponding path program 1 times [2021-11-07 08:10:05,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:05,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748819748] [2021-11-07 08:10:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:05,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:10:05,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:05,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748819748] [2021-11-07 08:10:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748819748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:05,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:10:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138853793] [2021-11-07 08:10:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:05,742 INFO L87 Difference]: Start difference. First operand 15858 states and 22929 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 08:10:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:10,181 INFO L93 Difference]: Finished difference Result 64864 states and 94056 transitions. [2021-11-07 08:10:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 110 [2021-11-07 08:10:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:10,513 INFO L225 Difference]: With dead ends: 64864 [2021-11-07 08:10:10,514 INFO L226 Difference]: Without dead ends: 56958 [2021-11-07 08:10:10,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56958 states. [2021-11-07 08:10:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56958 to 27730. [2021-11-07 08:10:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.4402610984889466) internal successors, (39937), 27729 states have internal predecessors, (39937), 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 08:10:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39937 transitions. [2021-11-07 08:10:13,275 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39937 transitions. Word has length 110 [2021-11-07 08:10:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:13,275 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39937 transitions. [2021-11-07 08:10:13,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 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 08:10:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39937 transitions. [2021-11-07 08:10:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:10:13,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:13,285 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:13,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:10:13,285 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1407980078, now seen corresponding path program 1 times [2021-11-07 08:10:13,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:13,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135306319] [2021-11-07 08:10:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:10:13,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:13,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135306319] [2021-11-07 08:10:13,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135306319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:13,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:13,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:10:13,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369616223] [2021-11-07 08:10:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:13,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:13,506 INFO L87 Difference]: Start difference. First operand 27730 states and 39937 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 08:10:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:18,759 INFO L93 Difference]: Finished difference Result 72768 states and 105448 transitions. [2021-11-07 08:10:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 110 [2021-11-07 08:10:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:18,993 INFO L225 Difference]: With dead ends: 72768 [2021-11-07 08:10:18,993 INFO L226 Difference]: Without dead ends: 64862 [2021-11-07 08:10:19,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64862 states. [2021-11-07 08:10:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64862 to 35634. [2021-11-07 08:10:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35634 states, 35633 states have (on average 1.440490556506609) internal successors, (51329), 35633 states have internal predecessors, (51329), 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 08:10:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35634 states to 35634 states and 51329 transitions. [2021-11-07 08:10:22,826 INFO L78 Accepts]: Start accepts. Automaton has 35634 states and 51329 transitions. Word has length 110 [2021-11-07 08:10:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:22,827 INFO L470 AbstractCegarLoop]: Abstraction has 35634 states and 51329 transitions. [2021-11-07 08:10:22,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 08:10:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 35634 states and 51329 transitions. [2021-11-07 08:10:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:10:22,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:22,840 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:22,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:10:22,840 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:22,841 INFO L85 PathProgramCache]: Analyzing trace with hash 172521038, now seen corresponding path program 1 times [2021-11-07 08:10:22,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:22,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557684345] [2021-11-07 08:10:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:22,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:10:23,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:23,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557684345] [2021-11-07 08:10:23,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557684345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:23,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:23,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:10:23,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208820860] [2021-11-07 08:10:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:23,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:23,076 INFO L87 Difference]: Start difference. First operand 35634 states and 51329 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 08:10:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:29,744 INFO L93 Difference]: Finished difference Result 80672 states and 116840 transitions. [2021-11-07 08:10:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 110 [2021-11-07 08:10:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:29,844 INFO L225 Difference]: With dead ends: 80672 [2021-11-07 08:10:29,844 INFO L226 Difference]: Without dead ends: 72766 [2021-11-07 08:10:29,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:10:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72766 states. [2021-11-07 08:10:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72766 to 43538. [2021-11-07 08:10:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43538 states, 43537 states have (on average 1.4406366998185451) internal successors, (62721), 43537 states have internal predecessors, (62721), 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 08:10:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43538 states to 43538 states and 62721 transitions. [2021-11-07 08:10:34,212 INFO L78 Accepts]: Start accepts. Automaton has 43538 states and 62721 transitions. Word has length 110 [2021-11-07 08:10:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:34,213 INFO L470 AbstractCegarLoop]: Abstraction has 43538 states and 62721 transitions. [2021-11-07 08:10:34,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 08:10:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43538 states and 62721 transitions. [2021-11-07 08:10:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:10:34,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:34,227 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:34,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:10:34,228 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1248474514, now seen corresponding path program 1 times [2021-11-07 08:10:34,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:34,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696900191] [2021-11-07 08:10:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:34,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:10:34,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:34,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696900191] [2021-11-07 08:10:34,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696900191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:34,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:34,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:10:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884891423] [2021-11-07 08:10:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:34,417 INFO L87 Difference]: Start difference. First operand 43538 states and 62721 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 08:10:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:42,429 INFO L93 Difference]: Finished difference Result 88576 states and 128232 transitions. [2021-11-07 08:10:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 110 [2021-11-07 08:10:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:42,551 INFO L225 Difference]: With dead ends: 88576 [2021-11-07 08:10:42,551 INFO L226 Difference]: Without dead ends: 80670 [2021-11-07 08:10:42,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:10:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80670 states.