./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G --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 a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:09:33,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:09:33,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:09:33,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:09:33,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:09:33,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:09:33,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:09:33,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:09:33,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:09:33,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:09:33,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:09:33,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:09:33,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:09:33,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:09:33,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:09:33,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:09:33,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:09:33,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:09:33,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:09:33,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:09:33,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:09:33,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:09:33,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:09:33,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:09:33,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:09:33,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:09:33,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:09:33,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:09:33,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:09:33,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:09:33,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:09:33,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:09:33,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:09:33,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:09:33,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:09:33,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:09:33,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:09:33,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:09:33,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:09:33,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:09:33,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:09:33,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:09:33,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:09:33,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:09:33,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:09:33,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:09:33,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:09:33,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:09:33,495 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:09:33,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:09:33,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:09:33,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:09:33,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:09:33,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:09:33,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:09:33,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:09:33,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:09:33,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:09:33,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:09:33,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:09:33,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:09:33,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:09:33,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:09:33,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:09:33,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:33,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:09:33,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:09:33,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:09:33,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:09:33,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:09:33,502 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:09:33,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:09:33,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:09:33,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:09:33,503 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_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3df27f87602fca8935d2269a873dfd3f1a5195383d477434680a0bc703d239a [2021-11-23 13:09:33,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:09:33,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:09:33,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:09:33,874 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:09:33,875 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:09:33,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-11-23 13:09:33,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/data/de10f5bf5/cc2f6edcbbc24fbc862c17a1dcf8bcbf/FLAG0f090b690 [2021-11-23 13:09:34,585 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:09:34,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-11-23 13:09:34,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/data/de10f5bf5/cc2f6edcbbc24fbc862c17a1dcf8bcbf/FLAG0f090b690 [2021-11-23 13:09:34,834 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/data/de10f5bf5/cc2f6edcbbc24fbc862c17a1dcf8bcbf [2021-11-23 13:09:34,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:09:34,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:09:34,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:34,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:09:34,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:09:34,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:34" (1/1) ... [2021-11-23 13:09:34,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a7f725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:34, skipping insertion in model container [2021-11-23 13:09:34,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:09:34" (1/1) ... [2021-11-23 13:09:34,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:09:34,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:09:35,220 WARN L230 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_8ecf1861-85fc-43b2-87ff-d06351ab6526/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2021-11-23 13:09:35,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:35,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:09:35,333 WARN L230 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_8ecf1861-85fc-43b2-87ff-d06351ab6526/sv-benchmarks/c/seq-mthreaded/pals_lcr.8.1.ufo.UNBOUNDED.pals.c[26518,26531] [2021-11-23 13:09:35,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:09:35,352 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:09:35,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35 WrapperNode [2021-11-23 13:09:35,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:09:35,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:35,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:09:35,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:09:35,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,428 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 523 [2021-11-23 13:09:35,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:09:35,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:09:35,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:09:35,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:09:35,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:09:35,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:09:35,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:09:35,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:09:35,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (1/1) ... [2021-11-23 13:09:35,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:09:35,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:09:35,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:09:35,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf1861-85fc-43b2-87ff-d06351ab6526/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:09:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:09:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:09:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:09:35,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:09:35,811 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:09:35,814 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:09:36,603 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:09:36,614 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:09:36,615 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:09:36,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:36 BoogieIcfgContainer [2021-11-23 13:09:36,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:09:36,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:09:36,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:09:36,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:09:36,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:09:34" (1/3) ... [2021-11-23 13:09:36,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3df253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:36, skipping insertion in model container [2021-11-23 13:09:36,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:09:35" (2/3) ... [2021-11-23 13:09:36,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3df253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:09:36, skipping insertion in model container [2021-11-23 13:09:36,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:09:36" (3/3) ... [2021-11-23 13:09:36,628 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c [2021-11-23 13:09:36,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:09:36,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:09:36,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:09:36,710 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 [2021-11-23 13:09:36,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:09:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 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) [2021-11-23 13:09:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 13:09:36,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:36,766 INFO L514 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] [2021-11-23 13:09:36,767 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash 118130595, now seen corresponding path program 1 times [2021-11-23 13:09:36,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:36,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923620925] [2021-11-23 13:09:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:36,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:37,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923620925] [2021-11-23 13:09:37,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923620925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:37,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:37,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:09:37,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921122630] [2021-11-23 13:09:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:37,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:09:37,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:09:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:09:37,125 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7619047619047619) internal successors, (259), 148 states have internal predecessors, (259), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2021-11-23 13:09:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:37,162 INFO L93 Difference]: Finished difference Result 228 states and 387 transitions. [2021-11-23 13:09:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:09:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 45 [2021-11-23 13:09:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:37,185 INFO L225 Difference]: With dead ends: 228 [2021-11-23 13:09:37,186 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 13:09:37,191 INFO L932 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 [2021-11-23 13:09:37,198 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:37,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 13:09:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 13:09:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.75) internal successors, (252), 144 states have internal predecessors, (252), 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) [2021-11-23 13:09:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 252 transitions. [2021-11-23 13:09:37,320 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 252 transitions. Word has length 45 [2021-11-23 13:09:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 252 transitions. [2021-11-23 13:09:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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) [2021-11-23 13:09:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 252 transitions. [2021-11-23 13:09:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 13:09:37,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:37,332 INFO L514 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] [2021-11-23 13:09:37,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:09:37,332 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1253676703, now seen corresponding path program 1 times [2021-11-23 13:09:37,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:37,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725910462] [2021-11-23 13:09:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:37,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:37,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725910462] [2021-11-23 13:09:37,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725910462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:37,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:37,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:09:37,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920758129] [2021-11-23 13:09:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:37,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:09:37,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:09:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:09:37,480 INFO L87 Difference]: Start difference. First operand 145 states and 252 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-23 13:09:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:37,679 INFO L93 Difference]: Finished difference Result 227 states and 380 transitions. [2021-11-23 13:09:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:09:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 45 [2021-11-23 13:09:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:37,682 INFO L225 Difference]: With dead ends: 227 [2021-11-23 13:09:37,682 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 13:09:37,683 INFO L932 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 [2021-11-23 13:09:37,685 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 3 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:37,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 936 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:09:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 13:09:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 13:09:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3263888888888888) internal successors, (191), 144 states have internal predecessors, (191), 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) [2021-11-23 13:09:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2021-11-23 13:09:37,698 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 45 [2021-11-23 13:09:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:37,698 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2021-11-23 13:09:37,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-11-23 13:09:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2021-11-23 13:09:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:37,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:37,703 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:09:37,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1781682001, now seen corresponding path program 1 times [2021-11-23 13:09:37,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45725803] [2021-11-23 13:09:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:37,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:37,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45725803] [2021-11-23 13:09:38,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45725803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:38,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:38,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:38,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155773702] [2021-11-23 13:09:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:38,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:38,006 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:38,048 INFO L93 Difference]: Finished difference Result 295 states and 429 transitions. [2021-11-23 13:09:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 105 [2021-11-23 13:09:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:38,056 INFO L225 Difference]: With dead ends: 295 [2021-11-23 13:09:38,056 INFO L226 Difference]: Without dead ends: 217 [2021-11-23 13:09:38,057 INFO L932 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 [2021-11-23 13:09:38,067 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 102 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:38,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 393 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-23 13:09:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-11-23 13:09:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4158878504672898) internal successors, (303), 214 states have internal predecessors, (303), 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) [2021-11-23 13:09:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 303 transitions. [2021-11-23 13:09:38,111 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 303 transitions. Word has length 105 [2021-11-23 13:09:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:38,112 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 303 transitions. [2021-11-23 13:09:38,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 303 transitions. [2021-11-23 13:09:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:38,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:38,117 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:38,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:09:38,118 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1036099271, now seen corresponding path program 1 times [2021-11-23 13:09:38,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658953918] [2021-11-23 13:09:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:38,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:38,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:38,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658953918] [2021-11-23 13:09:38,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658953918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:38,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:38,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:38,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071018274] [2021-11-23 13:09:38,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:38,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:38,277 INFO L87 Difference]: Start difference. First operand 215 states and 303 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:38,325 INFO L93 Difference]: Finished difference Result 499 states and 755 transitions. [2021-11-23 13:09:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 105 [2021-11-23 13:09:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:38,332 INFO L225 Difference]: With dead ends: 499 [2021-11-23 13:09:38,332 INFO L226 Difference]: Without dead ends: 351 [2021-11-23 13:09:38,334 INFO L932 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 [2021-11-23 13:09:38,336 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 98 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:38,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 392 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-23 13:09:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2021-11-23 13:09:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4827586206896552) internal successors, (516), 348 states have internal predecessors, (516), 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) [2021-11-23 13:09:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 516 transitions. [2021-11-23 13:09:38,384 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 516 transitions. Word has length 105 [2021-11-23 13:09:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:38,385 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 516 transitions. [2021-11-23 13:09:38,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 516 transitions. [2021-11-23 13:09:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:38,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:38,388 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:38,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:09:38,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash -903931587, now seen corresponding path program 1 times [2021-11-23 13:09:38,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482671672] [2021-11-23 13:09:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:38,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:38,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482671672] [2021-11-23 13:09:38,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482671672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:38,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:38,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:38,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588365803] [2021-11-23 13:09:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:38,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:38,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:38,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:38,550 INFO L87 Difference]: Start difference. First operand 349 states and 516 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:38,601 INFO L93 Difference]: Finished difference Result 889 states and 1374 transitions. [2021-11-23 13:09:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 105 [2021-11-23 13:09:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:38,609 INFO L225 Difference]: With dead ends: 889 [2021-11-23 13:09:38,609 INFO L226 Difference]: Without dead ends: 607 [2021-11-23 13:09:38,611 INFO L932 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 [2021-11-23 13:09:38,615 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 94 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:38,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 391 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-23 13:09:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2021-11-23 13:09:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.5231788079470199) internal successors, (920), 604 states have internal predecessors, (920), 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) [2021-11-23 13:09:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 920 transitions. [2021-11-23 13:09:38,653 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 920 transitions. Word has length 105 [2021-11-23 13:09:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 920 transitions. [2021-11-23 13:09:38,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 920 transitions. [2021-11-23 13:09:38,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:38,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:38,661 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:38,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:09:38,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1796751027, now seen corresponding path program 1 times [2021-11-23 13:09:38,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957671978] [2021-11-23 13:09:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:38,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:38,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:38,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957671978] [2021-11-23 13:09:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957671978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:38,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:38,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:38,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498783149] [2021-11-23 13:09:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:38,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:38,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:38,763 INFO L87 Difference]: Start difference. First operand 605 states and 920 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:38,804 INFO L93 Difference]: Finished difference Result 1633 states and 2546 transitions. [2021-11-23 13:09:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 105 [2021-11-23 13:09:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:38,812 INFO L225 Difference]: With dead ends: 1633 [2021-11-23 13:09:38,812 INFO L226 Difference]: Without dead ends: 1095 [2021-11-23 13:09:38,813 INFO L932 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 [2021-11-23 13:09:38,814 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 90 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:38,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 390 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-23 13:09:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1093. [2021-11-23 13:09:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.5421245421245422) internal successors, (1684), 1092 states have internal predecessors, (1684), 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) [2021-11-23 13:09:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1684 transitions. [2021-11-23 13:09:38,865 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1684 transitions. Word has length 105 [2021-11-23 13:09:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:38,866 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1684 transitions. [2021-11-23 13:09:38,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1684 transitions. [2021-11-23 13:09:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:38,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:38,869 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:38,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:09:38,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2134544169, now seen corresponding path program 1 times [2021-11-23 13:09:38,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:38,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090689061] [2021-11-23 13:09:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:38,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:38,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:38,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090689061] [2021-11-23 13:09:38,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090689061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:38,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:38,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:38,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434987083] [2021-11-23 13:09:38,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:38,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:38,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:38,983 INFO L87 Difference]: Start difference. First operand 1093 states and 1684 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:39,058 INFO L93 Difference]: Finished difference Result 3049 states and 4758 transitions. [2021-11-23 13:09:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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 105 [2021-11-23 13:09:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:39,074 INFO L225 Difference]: With dead ends: 3049 [2021-11-23 13:09:39,074 INFO L226 Difference]: Without dead ends: 2023 [2021-11-23 13:09:39,076 INFO L932 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 [2021-11-23 13:09:39,080 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:39,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 389 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-11-23 13:09:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2021. [2021-11-23 13:09:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 1.5465346534653466) internal successors, (3124), 2020 states have internal predecessors, (3124), 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) [2021-11-23 13:09:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 3124 transitions. [2021-11-23 13:09:39,193 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 3124 transitions. Word has length 105 [2021-11-23 13:09:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 3124 transitions. [2021-11-23 13:09:39,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2021-11-23 13:09:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 3124 transitions. [2021-11-23 13:09:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:09:39,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:39,201 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:39,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:09:39,201 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -942437729, now seen corresponding path program 1 times [2021-11-23 13:09:39,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616743704] [2021-11-23 13:09:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:39,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:39,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616743704] [2021-11-23 13:09:39,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616743704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:39,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:39,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:09:39,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556970107] [2021-11-23 13:09:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:39,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:09:39,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:09:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:09:39,381 INFO L87 Difference]: Start difference. First operand 2021 states and 3124 transitions. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2021-11-23 13:09:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:41,215 INFO L93 Difference]: Finished difference Result 33285 states and 52036 transitions. [2021-11-23 13:09:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:09:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 105 [2021-11-23 13:09:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:41,457 INFO L225 Difference]: With dead ends: 33285 [2021-11-23 13:09:41,457 INFO L226 Difference]: Without dead ends: 31331 [2021-11-23 13:09:41,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:09:41,483 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 3366 mSDsluCounter, 3113 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:41,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3366 Valid, 3298 Invalid, 215 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:09:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31331 states. [2021-11-23 13:09:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31331 to 3973. [2021-11-23 13:09:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 1.539778449144008) internal successors, (6116), 3972 states have internal predecessors, (6116), 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) [2021-11-23 13:09:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 6116 transitions. [2021-11-23 13:09:42,229 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 6116 transitions. Word has length 105 [2021-11-23 13:09:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:42,233 INFO L470 AbstractCegarLoop]: Abstraction has 3973 states and 6116 transitions. [2021-11-23 13:09:42,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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) [2021-11-23 13:09:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 6116 transitions. [2021-11-23 13:09:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 13:09:42,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:42,235 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:42,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:09:42,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -860244721, now seen corresponding path program 1 times [2021-11-23 13:09:42,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517250741] [2021-11-23 13:09:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:42,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517250741] [2021-11-23 13:09:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517250741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:42,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:42,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:42,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859388256] [2021-11-23 13:09:42,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:42,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:42,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:42,351 INFO L87 Difference]: Start difference. First operand 3973 states and 6116 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:42,836 INFO L93 Difference]: Finished difference Result 11433 states and 17606 transitions. [2021-11-23 13:09:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-23 13:09:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:42,855 INFO L225 Difference]: With dead ends: 11433 [2021-11-23 13:09:42,855 INFO L226 Difference]: Without dead ends: 7527 [2021-11-23 13:09:42,861 INFO L932 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 [2021-11-23 13:09:42,864 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 77 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:42,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 304 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2021-11-23 13:09:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7461. [2021-11-23 13:09:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7461 states, 7460 states have (on average 1.5190348525469168) internal successors, (11332), 7460 states have internal predecessors, (11332), 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) [2021-11-23 13:09:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7461 states to 7461 states and 11332 transitions. [2021-11-23 13:09:43,478 INFO L78 Accepts]: Start accepts. Automaton has 7461 states and 11332 transitions. Word has length 107 [2021-11-23 13:09:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:43,479 INFO L470 AbstractCegarLoop]: Abstraction has 7461 states and 11332 transitions. [2021-11-23 13:09:43,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7461 states and 11332 transitions. [2021-11-23 13:09:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 13:09:43,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:43,481 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:43,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:09:43,482 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash -793751209, now seen corresponding path program 1 times [2021-11-23 13:09:43,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720815451] [2021-11-23 13:09:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:43,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:43,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:43,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720815451] [2021-11-23 13:09:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720815451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:43,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:43,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:09:43,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740680791] [2021-11-23 13:09:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:43,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:09:43,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:09:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:09:43,861 INFO L87 Difference]: Start difference. First operand 7461 states and 11332 transitions. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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) [2021-11-23 13:09:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:44,953 INFO L93 Difference]: Finished difference Result 14857 states and 22598 transitions. [2021-11-23 13:09:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:09:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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 107 [2021-11-23 13:09:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:44,971 INFO L225 Difference]: With dead ends: 14857 [2021-11-23 13:09:44,971 INFO L226 Difference]: Without dead ends: 7463 [2021-11-23 13:09:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:09:44,982 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 652 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:44,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1208 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:09:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2021-11-23 13:09:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 7461. [2021-11-23 13:09:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7461 states, 7460 states have (on average 1.510455764075067) internal successors, (11268), 7460 states have internal predecessors, (11268), 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) [2021-11-23 13:09:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7461 states to 7461 states and 11268 transitions. [2021-11-23 13:09:45,460 INFO L78 Accepts]: Start accepts. Automaton has 7461 states and 11268 transitions. Word has length 107 [2021-11-23 13:09:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:45,460 INFO L470 AbstractCegarLoop]: Abstraction has 7461 states and 11268 transitions. [2021-11-23 13:09:45,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 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) [2021-11-23 13:09:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7461 states and 11268 transitions. [2021-11-23 13:09:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 13:09:45,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:45,472 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:09:45,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1539759597, now seen corresponding path program 1 times [2021-11-23 13:09:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344332118] [2021-11-23 13:09:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:45,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:45,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344332118] [2021-11-23 13:09:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344332118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:45,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:45,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:45,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307605063] [2021-11-23 13:09:45,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:45,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:45,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:45,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:45,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:45,550 INFO L87 Difference]: Start difference. First operand 7461 states and 11268 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:46,512 INFO L93 Difference]: Finished difference Result 21481 states and 32390 transitions. [2021-11-23 13:09:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-23 13:09:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:46,551 INFO L225 Difference]: With dead ends: 21481 [2021-11-23 13:09:46,551 INFO L226 Difference]: Without dead ends: 14087 [2021-11-23 13:09:46,560 INFO L932 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 [2021-11-23 13:09:46,561 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 106 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:46,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 403 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14087 states. [2021-11-23 13:09:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14087 to 14085. [2021-11-23 13:09:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14085 states, 14084 states have (on average 1.4953138312979268) internal successors, (21060), 14084 states have internal predecessors, (21060), 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) [2021-11-23 13:09:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14085 states to 14085 states and 21060 transitions. [2021-11-23 13:09:47,486 INFO L78 Accepts]: Start accepts. Automaton has 14085 states and 21060 transitions. Word has length 107 [2021-11-23 13:09:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:47,487 INFO L470 AbstractCegarLoop]: Abstraction has 14085 states and 21060 transitions. [2021-11-23 13:09:47,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 14085 states and 21060 transitions. [2021-11-23 13:09:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 13:09:47,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:47,489 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:47,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:09:47,489 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1642858163, now seen corresponding path program 1 times [2021-11-23 13:09:47,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:47,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957066435] [2021-11-23 13:09:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:47,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:47,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:47,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957066435] [2021-11-23 13:09:47,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957066435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:47,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:47,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:47,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842951738] [2021-11-23 13:09:47,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:47,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:47,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:47,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:47,568 INFO L87 Difference]: Start difference. First operand 14085 states and 21060 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:48,836 INFO L93 Difference]: Finished difference Result 40585 states and 60486 transitions. [2021-11-23 13:09:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-23 13:09:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:48,887 INFO L225 Difference]: With dead ends: 40585 [2021-11-23 13:09:48,887 INFO L226 Difference]: Without dead ends: 26567 [2021-11-23 13:09:48,903 INFO L932 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 [2021-11-23 13:09:48,904 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 110 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:48,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 412 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26567 states. [2021-11-23 13:09:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26567 to 26565. [2021-11-23 13:09:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26565 states, 26564 states have (on average 1.4770365908748682) internal successors, (39236), 26564 states have internal predecessors, (39236), 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) [2021-11-23 13:09:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26565 states to 26565 states and 39236 transitions. [2021-11-23 13:09:50,548 INFO L78 Accepts]: Start accepts. Automaton has 26565 states and 39236 transitions. Word has length 107 [2021-11-23 13:09:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:50,548 INFO L470 AbstractCegarLoop]: Abstraction has 26565 states and 39236 transitions. [2021-11-23 13:09:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-23 13:09:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26565 states and 39236 transitions. [2021-11-23 13:09:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 13:09:50,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:50,550 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:50,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:09:50,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 748793536, now seen corresponding path program 1 times [2021-11-23 13:09:50,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:50,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470610995] [2021-11-23 13:09:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:50,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:50,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470610995] [2021-11-23 13:09:50,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470610995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:50,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:50,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:09:50,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117915438] [2021-11-23 13:09:50,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:50,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:09:50,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:09:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:09:50,657 INFO L87 Difference]: Start difference. First operand 26565 states and 39236 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-23 13:09:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:52,790 INFO L93 Difference]: Finished difference Result 46191 states and 67897 transitions. [2021-11-23 13:09:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:09:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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 108 [2021-11-23 13:09:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:52,855 INFO L225 Difference]: With dead ends: 46191 [2021-11-23 13:09:52,855 INFO L226 Difference]: Without dead ends: 46189 [2021-11-23 13:09:52,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:09:52,861 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 342 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:52,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 827 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46189 states. [2021-11-23 13:09:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46189 to 27333. [2021-11-23 13:09:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27333 states, 27332 states have (on average 1.4589492170349774) internal successors, (39876), 27332 states have internal predecessors, (39876), 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) [2021-11-23 13:09:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27333 states to 27333 states and 39876 transitions. [2021-11-23 13:09:54,881 INFO L78 Accepts]: Start accepts. Automaton has 27333 states and 39876 transitions. Word has length 108 [2021-11-23 13:09:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:54,882 INFO L470 AbstractCegarLoop]: Abstraction has 27333 states and 39876 transitions. [2021-11-23 13:09:54,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 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) [2021-11-23 13:09:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27333 states and 39876 transitions. [2021-11-23 13:09:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 13:09:54,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:54,884 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:09:54,884 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1878838190, now seen corresponding path program 1 times [2021-11-23 13:09:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869020182] [2021-11-23 13:09:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:54,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:09:54,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869020182] [2021-11-23 13:09:54,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869020182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:54,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:54,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:09:54,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005648550] [2021-11-23 13:09:54,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:54,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:09:54,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:09:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:09:54,955 INFO L87 Difference]: Start difference. First operand 27333 states and 39876 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-23 13:09:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:09:57,010 INFO L93 Difference]: Finished difference Result 54988 states and 80586 transitions. [2021-11-23 13:09:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:09:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-11-23 13:09:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:09:57,056 INFO L225 Difference]: With dead ends: 54988 [2021-11-23 13:09:57,056 INFO L226 Difference]: Without dead ends: 40137 [2021-11-23 13:09:57,076 INFO L932 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 [2021-11-23 13:09:57,077 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 111 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:09:57,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 416 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:09:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40137 states. [2021-11-23 13:09:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40137 to 40135. [2021-11-23 13:09:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40135 states, 40134 states have (on average 1.4528828424776996) internal successors, (58310), 40134 states have internal predecessors, (58310), 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) [2021-11-23 13:09:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40135 states to 40135 states and 58310 transitions. [2021-11-23 13:09:59,317 INFO L78 Accepts]: Start accepts. Automaton has 40135 states and 58310 transitions. Word has length 109 [2021-11-23 13:09:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:09:59,318 INFO L470 AbstractCegarLoop]: Abstraction has 40135 states and 58310 transitions. [2021-11-23 13:09:59,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-11-23 13:09:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 40135 states and 58310 transitions. [2021-11-23 13:09:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 13:09:59,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:09:59,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:09:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:09:59,339 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:09:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:09:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2146990555, now seen corresponding path program 1 times [2021-11-23 13:09:59,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:09:59,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160043498] [2021-11-23 13:09:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:09:59,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:09:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:09:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 13:09:59,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:09:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160043498] [2021-11-23 13:09:59,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160043498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:09:59,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:09:59,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:09:59,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197078699] [2021-11-23 13:09:59,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:09:59,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:09:59,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:09:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:09:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:09:59,493 INFO L87 Difference]: Start difference. First operand 40135 states and 58310 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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) [2021-11-23 13:10:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:10:14,518 INFO L93 Difference]: Finished difference Result 368345 states and 535055 transitions. [2021-11-23 13:10:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:10:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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 148 [2021-11-23 13:10:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:10:15,017 INFO L225 Difference]: With dead ends: 368345 [2021-11-23 13:10:15,017 INFO L226 Difference]: Without dead ends: 328279 [2021-11-23 13:10:15,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:10:15,106 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 3261 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3261 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:10:15,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3261 Valid, 1598 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:10:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328279 states. [2021-11-23 13:10:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328279 to 80199. [2021-11-23 13:10:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80199 states, 80198 states have (on average 1.4484899872814783) internal successors, (116166), 80198 states have internal predecessors, (116166), 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) [2021-11-23 13:10:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80199 states to 80199 states and 116166 transitions. [2021-11-23 13:10:21,613 INFO L78 Accepts]: Start accepts. Automaton has 80199 states and 116166 transitions. Word has length 148 [2021-11-23 13:10:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:10:21,613 INFO L470 AbstractCegarLoop]: Abstraction has 80199 states and 116166 transitions. [2021-11-23 13:10:21,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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) [2021-11-23 13:10:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 80199 states and 116166 transitions. [2021-11-23 13:10:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 13:10:21,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:10:21,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:10:21,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:10:21,639 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:10:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:10:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash 378207739, now seen corresponding path program 1 times [2021-11-23 13:10:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:10:21,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151527536] [2021-11-23 13:10:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:10:21,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:10:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:10:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 13:10:21,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:10:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151527536] [2021-11-23 13:10:21,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151527536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:10:21,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:10:21,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:10:21,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751574797] [2021-11-23 13:10:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:10:21,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:10:21,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:10:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:10:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:10:21,791 INFO L87 Difference]: Start difference. First operand 80199 states and 116166 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 states have internal predecessors, (132), 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)