./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa --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 cbe797ede424f1ab8a64d91092275cecbbdb84c9d61e688c522ae0087e29fe1c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:45:06,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:45:06,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:45:06,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:45:06,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:45:06,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:45:06,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:45:06,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:45:06,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:45:06,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:45:06,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:45:06,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:45:06,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:45:06,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:45:06,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:45:06,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:45:06,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:45:06,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:45:06,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:45:06,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:45:06,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:45:06,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:45:06,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:45:06,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:45:06,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:45:06,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:45:06,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:45:06,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:45:06,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:45:06,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:45:06,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:45:06,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:45:06,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:45:06,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:45:06,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:45:06,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:45:06,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:45:06,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:45:06,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:45:06,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:45:06,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:45:06,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:45:06,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:45:06,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:45:06,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:45:06,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:45:06,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:45:06,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:45:06,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:45:06,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:45:06,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:45:06,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:45:06,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:45:06,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:06,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:45:06,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:45:06,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:45:06,421 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:45:06,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:45:06,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:45:06,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:45:06,421 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_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbe797ede424f1ab8a64d91092275cecbbdb84c9d61e688c522ae0087e29fe1c [2021-12-06 18:45:06,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:45:06,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:45:06,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:45:06,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:45:06,622 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:45:06,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:45:06,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/data/5141ed050/01d4e0b8b2234aa487021e1ccb1104ff/FLAG6b813e791 [2021-12-06 18:45:07,215 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:45:07,216 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:45:07,236 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/data/5141ed050/01d4e0b8b2234aa487021e1ccb1104ff/FLAG6b813e791 [2021-12-06 18:45:07,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/data/5141ed050/01d4e0b8b2234aa487021e1ccb1104ff [2021-12-06 18:45:07,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:45:07,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:45:07,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:07,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:45:07,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:45:07,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:07" (1/1) ... [2021-12-06 18:45:07,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2bf06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:07, skipping insertion in model container [2021-12-06 18:45:07,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:45:07" (1/1) ... [2021-12-06 18:45:07,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:45:07,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:45:08,047 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_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8786,8799] [2021-12-06 18:45:08,090 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_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15722,15735] [2021-12-06 18:45:08,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:08,642 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:45:08,661 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_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8786,8799] [2021-12-06 18:45:08,671 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_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15722,15735] [2021-12-06 18:45:09,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:45:09,056 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:45:09,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09 WrapperNode [2021-12-06 18:45:09,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:45:09,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:09,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:45:09,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:45:09,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,298 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5029 [2021-12-06 18:45:09,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:45:09,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:45:09,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:45:09,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:45:09,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:45:09,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:45:09,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:45:09,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:45:09,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (1/1) ... [2021-12-06 18:45:09,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:45:09,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:09,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:45:09,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:45:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:45:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:45:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:45:09,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:45:09,743 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:45:09,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:45:12,568 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:45:12,582 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:45:12,583 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:45:12,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:45:12 BoogieIcfgContainer [2021-12-06 18:45:12,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:45:12,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:45:12,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:45:12,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:45:12,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:45:07" (1/3) ... [2021-12-06 18:45:12,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fb27e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:45:12, skipping insertion in model container [2021-12-06 18:45:12,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:45:09" (2/3) ... [2021-12-06 18:45:12,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fb27e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:45:12, skipping insertion in model container [2021-12-06 18:45:12,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:45:12" (3/3) ... [2021-12-06 18:45:12,592 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:45:12,595 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:45:12,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:45:12,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:45:12,641 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 [2021-12-06 18:45:12,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:45:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:45:12,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:12,684 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] [2021-12-06 18:45:12,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-12-06 18:45:12,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:12,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012070153] [2021-12-06 18:45:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:12,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:12,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012070153] [2021-12-06 18:45:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012070153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:12,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:12,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:45:12,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992798925] [2021-12-06 18:45:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:45:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:45:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:45:12,862 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 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 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:12,920 INFO L93 Difference]: Finished difference Result 1755 states and 3330 transitions. [2021-12-06 18:45:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:45:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 18:45:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:12,937 INFO L225 Difference]: With dead ends: 1755 [2021-12-06 18:45:12,938 INFO L226 Difference]: Without dead ends: 827 [2021-12-06 18:45:12,942 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 [2021-12-06 18:45:12,945 INFO L933 BasicCegarLoop]: 1624 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, 1624 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 [2021-12-06 18:45:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-06 18:45:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-06 18:45:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2021-12-06 18:45:13,005 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2021-12-06 18:45:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2021-12-06 18:45:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2021-12-06 18:45:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:45:13,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,007 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] [2021-12-06 18:45:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:45:13,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-06 18:45:13,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353215044] [2021-12-06 18:45:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353215044] [2021-12-06 18:45:13,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353215044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:45:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797652051] [2021-12-06 18:45:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:45:13,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:45:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:45:13,138 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:13,262 INFO L93 Difference]: Finished difference Result 875 states and 1633 transitions. [2021-12-06 18:45:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:45:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 18:45:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:13,269 INFO L225 Difference]: With dead ends: 875 [2021-12-06 18:45:13,269 INFO L226 Difference]: Without dead ends: 827 [2021-12-06 18:45:13,270 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 [2021-12-06 18:45:13,271 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 3 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6206 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:13,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-06 18:45:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-06 18:45:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2021-12-06 18:45:13,299 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2021-12-06 18:45:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,299 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2021-12-06 18:45:13,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2021-12-06 18:45:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:45:13,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,302 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] [2021-12-06 18:45:13,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:45:13,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-06 18:45:13,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713455677] [2021-12-06 18:45:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713455677] [2021-12-06 18:45:13,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713455677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:13,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780781156] [2021-12-06 18:45:13,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:13,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:13,379 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:13,413 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2021-12-06 18:45:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:13,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:45:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:13,419 INFO L225 Difference]: With dead ends: 909 [2021-12-06 18:45:13,419 INFO L226 Difference]: Without dead ends: 865 [2021-12-06 18:45:13,420 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 [2021-12-06 18:45:13,421 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 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 [2021-12-06 18:45:13,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-06 18:45:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-12-06 18:45:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2021-12-06 18:45:13,444 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2021-12-06 18:45:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,444 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2021-12-06 18:45:13,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2021-12-06 18:45:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:45:13,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,446 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] [2021-12-06 18:45:13,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:45:13,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-06 18:45:13,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006317220] [2021-12-06 18:45:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006317220] [2021-12-06 18:45:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006317220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:13,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258091961] [2021-12-06 18:45:13,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:13,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:13,510 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:13,539 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2021-12-06 18:45:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:45:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:13,544 INFO L225 Difference]: With dead ends: 1011 [2021-12-06 18:45:13,545 INFO L226 Difference]: Without dead ends: 931 [2021-12-06 18:45:13,545 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 [2021-12-06 18:45:13,547 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 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 [2021-12-06 18:45:13,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-06 18:45:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-06 18:45:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2021-12-06 18:45:13,571 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2021-12-06 18:45:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,572 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2021-12-06 18:45:13,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2021-12-06 18:45:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:45:13,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,573 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] [2021-12-06 18:45:13,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:45:13,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-06 18:45:13,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952332008] [2021-12-06 18:45:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952332008] [2021-12-06 18:45:13,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952332008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:13,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926020365] [2021-12-06 18:45:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:13,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:13,629 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:13,662 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2021-12-06 18:45:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:45:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:13,669 INFO L225 Difference]: With dead ends: 1197 [2021-12-06 18:45:13,669 INFO L226 Difference]: Without dead ends: 1051 [2021-12-06 18:45:13,670 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 [2021-12-06 18:45:13,671 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 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 [2021-12-06 18:45:13,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-06 18:45:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2021-12-06 18:45:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2021-12-06 18:45:13,722 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2021-12-06 18:45:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2021-12-06 18:45:13,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2021-12-06 18:45:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:45:13,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,724 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] [2021-12-06 18:45:13,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:45:13,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-06 18:45:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548657546] [2021-12-06 18:45:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548657546] [2021-12-06 18:45:13,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548657546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:13,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183709090] [2021-12-06 18:45:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:13,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:13,776 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:13,814 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2021-12-06 18:45:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:45:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:13,823 INFO L225 Difference]: With dead ends: 1533 [2021-12-06 18:45:13,823 INFO L226 Difference]: Without dead ends: 1267 [2021-12-06 18:45:13,825 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 [2021-12-06 18:45:13,826 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 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 [2021-12-06 18:45:13,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-12-06 18:45:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-12-06 18:45:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2021-12-06 18:45:13,855 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2021-12-06 18:45:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:13,856 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2021-12-06 18:45:13,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2021-12-06 18:45:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:45:13,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:13,856 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] [2021-12-06 18:45:13,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:45:13,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-06 18:45:13,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:13,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918481555] [2021-12-06 18:45:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:13,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:13,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918481555] [2021-12-06 18:45:13,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918481555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:13,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:13,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:13,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375133795] [2021-12-06 18:45:13,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:13,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:13,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:13,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:13,905 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:14,088 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2021-12-06 18:45:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:45:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:45:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:14,109 INFO L225 Difference]: With dead ends: 5121 [2021-12-06 18:45:14,109 INFO L226 Difference]: Without dead ends: 4639 [2021-12-06 18:45:14,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:45:14,112 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-12-06 18:45:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2021-12-06 18:45:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2021-12-06 18:45:14,187 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2021-12-06 18:45:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:14,188 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2021-12-06 18:45:14,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2021-12-06 18:45:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:45:14,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:14,189 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] [2021-12-06 18:45:14,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:45:14,189 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:14,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-06 18:45:14,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:14,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988093635] [2021-12-06 18:45:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:14,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:14,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:14,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988093635] [2021-12-06 18:45:14,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988093635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:14,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:14,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:14,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326713608] [2021-12-06 18:45:14,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:14,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:45:14,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:14,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:45:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:45:14,223 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:14,282 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2021-12-06 18:45:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:45:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:45:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:14,292 INFO L225 Difference]: With dead ends: 3151 [2021-12-06 18:45:14,292 INFO L226 Difference]: Without dead ends: 2189 [2021-12-06 18:45:14,293 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 [2021-12-06 18:45:14,294 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:14,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-06 18:45:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-06 18:45:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2021-12-06 18:45:14,379 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2021-12-06 18:45:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:14,379 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2021-12-06 18:45:14,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2021-12-06 18:45:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:45:14,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:14,380 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] [2021-12-06 18:45:14,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:45:14,381 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-06 18:45:14,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931206220] [2021-12-06 18:45:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:14,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:14,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931206220] [2021-12-06 18:45:14,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931206220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:14,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:14,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:14,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066884387] [2021-12-06 18:45:14,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:14,479 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:14,632 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2021-12-06 18:45:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 18:45:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:14,643 INFO L225 Difference]: With dead ends: 3591 [2021-12-06 18:45:14,643 INFO L226 Difference]: Without dead ends: 2189 [2021-12-06 18:45:14,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:45:14,645 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:14,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1732 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-06 18:45:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-06 18:45:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2021-12-06 18:45:14,722 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2021-12-06 18:45:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:14,723 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2021-12-06 18:45:14,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2021-12-06 18:45:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:45:14,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:14,723 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] [2021-12-06 18:45:14,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:45:14,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-06 18:45:14,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901525922] [2021-12-06 18:45:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:14,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:14,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:14,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901525922] [2021-12-06 18:45:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901525922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:14,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:14,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:45:14,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489188231] [2021-12-06 18:45:14,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:14,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:14,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:14,774 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:14,906 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2021-12-06 18:45:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:45:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:14,915 INFO L225 Difference]: With dead ends: 3589 [2021-12-06 18:45:14,916 INFO L226 Difference]: Without dead ends: 2187 [2021-12-06 18:45:14,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:14,918 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-06 18:45:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-06 18:45:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2021-12-06 18:45:14,987 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2021-12-06 18:45:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:14,987 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2021-12-06 18:45:14,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2021-12-06 18:45:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:45:14,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:14,988 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] [2021-12-06 18:45:14,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:45:14,988 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-06 18:45:14,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248190517] [2021-12-06 18:45:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:14,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:15,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:15,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248190517] [2021-12-06 18:45:15,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248190517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:15,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:15,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:45:15,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493791633] [2021-12-06 18:45:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:15,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:15,031 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:15,165 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2021-12-06 18:45:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:45:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:15,178 INFO L225 Difference]: With dead ends: 3589 [2021-12-06 18:45:15,178 INFO L226 Difference]: Without dead ends: 2187 [2021-12-06 18:45:15,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:15,181 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-06 18:45:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-06 18:45:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2021-12-06 18:45:15,268 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2021-12-06 18:45:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:15,268 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2021-12-06 18:45:15,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2021-12-06 18:45:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:45:15,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:15,269 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] [2021-12-06 18:45:15,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:45:15,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:15,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-06 18:45:15,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:15,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221793683] [2021-12-06 18:45:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:15,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:15,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221793683] [2021-12-06 18:45:15,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221793683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:15,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:15,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:45:15,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643576110] [2021-12-06 18:45:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:15,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:45:15,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:45:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:45:15,315 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:15,451 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2021-12-06 18:45:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:45:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 18:45:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:15,465 INFO L225 Difference]: With dead ends: 3418 [2021-12-06 18:45:15,465 INFO L226 Difference]: Without dead ends: 3416 [2021-12-06 18:45:15,466 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 [2021-12-06 18:45:15,467 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:15,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-12-06 18:45:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2021-12-06 18:45:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2021-12-06 18:45:15,556 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2021-12-06 18:45:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:15,556 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2021-12-06 18:45:15,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2021-12-06 18:45:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 18:45:15,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:15,557 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] [2021-12-06 18:45:15,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:45:15,557 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1748179653, now seen corresponding path program 1 times [2021-12-06 18:45:15,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:15,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975260521] [2021-12-06 18:45:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:15,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:15,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975260521] [2021-12-06 18:45:15,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975260521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:15,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:15,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:45:15,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338806748] [2021-12-06 18:45:15,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:15,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:45:15,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:45:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:45:15,607 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:20,137 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2021-12-06 18:45:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:45:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-06 18:45:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:20,151 INFO L225 Difference]: With dead ends: 4538 [2021-12-06 18:45:20,151 INFO L226 Difference]: Without dead ends: 3785 [2021-12-06 18:45:20,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:45:20,152 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 2373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:20,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2373 Valid, 807 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-06 18:45:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-12-06 18:45:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2021-12-06 18:45:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3783 states have (on average 1.5027755749405234) internal successors, (5685), 3784 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5685 transitions. [2021-12-06 18:45:20,256 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5685 transitions. Word has length 60 [2021-12-06 18:45:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:20,256 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5685 transitions. [2021-12-06 18:45:20,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5685 transitions. [2021-12-06 18:45:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:45:20,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:20,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:20,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:45:20,258 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-06 18:45:20,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:20,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519572492] [2021-12-06 18:45:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:20,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:45:20,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519572492] [2021-12-06 18:45:20,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519572492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:20,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:20,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:20,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652897115] [2021-12-06 18:45:20,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:20,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:20,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:20,305 INFO L87 Difference]: Start difference. First operand 3785 states and 5685 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:20,599 INFO L93 Difference]: Finished difference Result 10091 states and 14454 transitions. [2021-12-06 18:45:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:45:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:20,613 INFO L225 Difference]: With dead ends: 10091 [2021-12-06 18:45:20,613 INFO L226 Difference]: Without dead ends: 8593 [2021-12-06 18:45:20,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:20,617 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:20,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2021-12-06 18:45:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2021-12-06 18:45:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.4678916461451033) internal successors, (7749), 5280 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7749 transitions. [2021-12-06 18:45:20,799 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7749 transitions. Word has length 79 [2021-12-06 18:45:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:20,799 INFO L470 AbstractCegarLoop]: Abstraction has 5281 states and 7749 transitions. [2021-12-06 18:45:20,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:20,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7749 transitions. [2021-12-06 18:45:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:45:20,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:20,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:20,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:45:20,801 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:20,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-06 18:45:20,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:20,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389380505] [2021-12-06 18:45:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:20,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:45:20,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:20,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389380505] [2021-12-06 18:45:20,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389380505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:20,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:20,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:20,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358689827] [2021-12-06 18:45:20,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:20,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:20,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:20,848 INFO L87 Difference]: Start difference. First operand 5281 states and 7749 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:21,225 INFO L93 Difference]: Finished difference Result 11587 states and 16518 transitions. [2021-12-06 18:45:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:45:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:21,239 INFO L225 Difference]: With dead ends: 11587 [2021-12-06 18:45:21,239 INFO L226 Difference]: Without dead ends: 10089 [2021-12-06 18:45:21,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:21,242 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2021-12-06 18:45:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2021-12-06 18:45:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7527 states have (on average 1.4381559718347283) internal successors, (10825), 7528 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10825 transitions. [2021-12-06 18:45:21,522 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10825 transitions. Word has length 79 [2021-12-06 18:45:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:21,522 INFO L470 AbstractCegarLoop]: Abstraction has 7529 states and 10825 transitions. [2021-12-06 18:45:21,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10825 transitions. [2021-12-06 18:45:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:45:21,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:21,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:21,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:45:21,524 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-06 18:45:21,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70855154] [2021-12-06 18:45:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:21,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:45:21,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70855154] [2021-12-06 18:45:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70855154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:21,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:21,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:21,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177149518] [2021-12-06 18:45:21,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:21,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:21,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:21,570 INFO L87 Difference]: Start difference. First operand 7529 states and 10825 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:22,000 INFO L93 Difference]: Finished difference Result 13083 states and 18582 transitions. [2021-12-06 18:45:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:45:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:22,016 INFO L225 Difference]: With dead ends: 13083 [2021-12-06 18:45:22,016 INFO L226 Difference]: Without dead ends: 11585 [2021-12-06 18:45:22,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:22,021 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4738 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2021-12-06 18:45:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2021-12-06 18:45:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9023 states have (on average 1.428460600687133) internal successors, (12889), 9024 states have internal predecessors, (12889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12889 transitions. [2021-12-06 18:45:22,383 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12889 transitions. Word has length 79 [2021-12-06 18:45:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 9025 states and 12889 transitions. [2021-12-06 18:45:22,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12889 transitions. [2021-12-06 18:45:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:45:22,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:22,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:45:22,386 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-06 18:45:22,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:22,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639345822] [2021-12-06 18:45:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:45:22,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:22,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639345822] [2021-12-06 18:45:22,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639345822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:45:22,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:45:22,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:45:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862098485] [2021-12-06 18:45:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:45:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:45:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:45:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:45:22,427 INFO L87 Difference]: Start difference. First operand 9025 states and 12889 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:22,941 INFO L93 Difference]: Finished difference Result 13699 states and 19446 transitions. [2021-12-06 18:45:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:45:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 18:45:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:22,954 INFO L225 Difference]: With dead ends: 13699 [2021-12-06 18:45:22,954 INFO L226 Difference]: Without dead ends: 12641 [2021-12-06 18:45:22,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:45:22,958 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:22,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:45:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2021-12-06 18:45:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2021-12-06 18:45:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10079 states have (on average 1.42484373449747) internal successors, (14361), 10080 states have internal predecessors, (14361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14361 transitions. [2021-12-06 18:45:23,379 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14361 transitions. Word has length 79 [2021-12-06 18:45:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:23,379 INFO L470 AbstractCegarLoop]: Abstraction has 10081 states and 14361 transitions. [2021-12-06 18:45:23,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14361 transitions. [2021-12-06 18:45:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:45:23,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:23,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:23,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:45:23,382 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-06 18:45:23,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:23,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097751] [2021-12-06 18:45:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:23,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:23,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097751] [2021-12-06 18:45:23,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525868350] [2021-12-06 18:45:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:23,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:23,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:45:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:45:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:45:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:45:24,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525868350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:24,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:24,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-06 18:45:24,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784958146] [2021-12-06 18:45:24,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:24,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:45:24,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:45:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:45:24,024 INFO L87 Difference]: Start difference. First operand 10081 states and 14361 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:45:34,220 INFO L93 Difference]: Finished difference Result 117349 states and 161271 transitions. [2021-12-06 18:45:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-06 18:45:34,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 18:45:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:45:34,347 INFO L225 Difference]: With dead ends: 117349 [2021-12-06 18:45:34,348 INFO L226 Difference]: Without dead ends: 109555 [2021-12-06 18:45:34,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11149 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4231, Invalid=21209, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 18:45:34,378 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 15753 mSDsluCounter, 5768 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15753 SdHoareTripleChecker+Valid, 7425 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:45:34,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15753 Valid, 7425 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:45:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109555 states. [2021-12-06 18:45:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109555 to 56409. [2021-12-06 18:45:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56409 states, 56407 states have (on average 1.3639264630276384) internal successors, (76935), 56408 states have internal predecessors, (76935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56409 states to 56409 states and 76935 transitions. [2021-12-06 18:45:38,043 INFO L78 Accepts]: Start accepts. Automaton has 56409 states and 76935 transitions. Word has length 80 [2021-12-06 18:45:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:45:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 56409 states and 76935 transitions. [2021-12-06 18:45:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:45:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 56409 states and 76935 transitions. [2021-12-06 18:45:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:45:38,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:45:38,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:45:38,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:45:38,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:45:38,249 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:45:38,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:45:38,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2021-12-06 18:45:38,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:45:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136793867] [2021-12-06 18:45:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:38,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:45:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:38,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:45:38,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136793867] [2021-12-06 18:45:38,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136793867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:45:38,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747719178] [2021-12-06 18:45:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:45:38,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:45:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:45:38,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:45:38,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:45:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:45:38,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:45:38,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:45:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:39,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:45:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:45:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747719178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:45:39,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:45:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-06 18:45:39,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455504529] [2021-12-06 18:45:39,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:45:39,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:45:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:45:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:45:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:45:39,502 INFO L87 Difference]: Start difference. First operand 56409 states and 76935 transitions. Second operand has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:46:32,898 INFO L93 Difference]: Finished difference Result 732834 states and 972466 transitions. [2021-12-06 18:46:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-12-06 18:46:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:46:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:46:34,007 INFO L225 Difference]: With dead ends: 732834 [2021-12-06 18:46:34,007 INFO L226 Difference]: Without dead ends: 678712 [2021-12-06 18:46:34,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16234 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5337, Invalid=36483, Unknown=0, NotChecked=0, Total=41820 [2021-12-06 18:46:34,161 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 22916 mSDsluCounter, 10161 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22916 SdHoareTripleChecker+Valid, 11843 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:46:34,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22916 Valid, 11843 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2816 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:46:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678712 states. [2021-12-06 18:46:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678712 to 254605. [2021-12-06 18:46:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254605 states, 254603 states have (on average 1.3473918217774339) internal successors, (343050), 254604 states have internal predecessors, (343050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254605 states to 254605 states and 343050 transitions. [2021-12-06 18:46:56,150 INFO L78 Accepts]: Start accepts. Automaton has 254605 states and 343050 transitions. Word has length 81 [2021-12-06 18:46:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:46:56,151 INFO L470 AbstractCegarLoop]: Abstraction has 254605 states and 343050 transitions. [2021-12-06 18:46:56,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:46:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 254605 states and 343050 transitions. [2021-12-06 18:46:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:46:56,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:46:56,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:46:56,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:46:56,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:46:56,358 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:46:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:46:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash 526176474, now seen corresponding path program 1 times [2021-12-06 18:46:56,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:46:56,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758208933] [2021-12-06 18:46:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:46:56,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:46:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:46:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:46:56,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:46:56,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758208933] [2021-12-06 18:46:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758208933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:46:56,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:46:56,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:46:56,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207307871] [2021-12-06 18:46:56,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:46:56,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:46:56,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:46:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:46:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:46:56,423 INFO L87 Difference]: Start difference. First operand 254605 states and 343050 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:14,674 INFO L93 Difference]: Finished difference Result 506925 states and 682505 transitions. [2021-12-06 18:47:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:47:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:15,047 INFO L225 Difference]: With dead ends: 506925 [2021-12-06 18:47:15,047 INFO L226 Difference]: Without dead ends: 254607 [2021-12-06 18:47:15,171 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 [2021-12-06 18:47:15,171 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 37 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:15,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 3084 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254607 states. [2021-12-06 18:47:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254607 to 249013. [2021-12-06 18:47:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249013 states, 249011 states have (on average 1.3249133572412464) internal successors, (329918), 249012 states have internal predecessors, (329918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249013 states to 249013 states and 329918 transitions. [2021-12-06 18:47:34,315 INFO L78 Accepts]: Start accepts. Automaton has 249013 states and 329918 transitions. Word has length 81 [2021-12-06 18:47:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:34,315 INFO L470 AbstractCegarLoop]: Abstraction has 249013 states and 329918 transitions. [2021-12-06 18:47:34,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 249013 states and 329918 transitions. [2021-12-06 18:47:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:47:34,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:34,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:34,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:47:34,319 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash 252488762, now seen corresponding path program 1 times [2021-12-06 18:47:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:34,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117425411] [2021-12-06 18:47:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:34,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:34,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117425411] [2021-12-06 18:47:34,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117425411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:34,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:34,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:34,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244393015] [2021-12-06 18:47:34,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:34,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:34,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:34,346 INFO L87 Difference]: Start difference. First operand 249013 states and 329918 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:44,789 INFO L93 Difference]: Finished difference Result 387329 states and 511761 transitions. [2021-12-06 18:47:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:47:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:44,983 INFO L225 Difference]: With dead ends: 387329 [2021-12-06 18:47:44,983 INFO L226 Difference]: Without dead ends: 140603 [2021-12-06 18:47:45,079 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 [2021-12-06 18:47:45,079 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 30 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:45,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 3076 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140603 states. [2021-12-06 18:47:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140603 to 136785. [2021-12-06 18:47:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136785 states, 136783 states have (on average 1.2906135996432304) internal successors, (176534), 136784 states have internal predecessors, (176534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136785 states to 136785 states and 176534 transitions. [2021-12-06 18:47:55,584 INFO L78 Accepts]: Start accepts. Automaton has 136785 states and 176534 transitions. Word has length 81 [2021-12-06 18:47:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:55,584 INFO L470 AbstractCegarLoop]: Abstraction has 136785 states and 176534 transitions. [2021-12-06 18:47:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 136785 states and 176534 transitions. [2021-12-06 18:47:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:47:55,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:55,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:47:55,587 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 176324506, now seen corresponding path program 1 times [2021-12-06 18:47:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193989348] [2021-12-06 18:47:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:55,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:55,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193989348] [2021-12-06 18:47:55,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193989348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:55,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:55,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148842259] [2021-12-06 18:47:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:55,614 INFO L87 Difference]: Start difference. First operand 136785 states and 176534 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:00,390 INFO L93 Difference]: Finished difference Result 198225 states and 255075 transitions. [2021-12-06 18:48:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:48:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:48:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:00,464 INFO L225 Difference]: With dead ends: 198225 [2021-12-06 18:48:00,464 INFO L226 Difference]: Without dead ends: 63727 [2021-12-06 18:48:00,515 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 [2021-12-06 18:48:00,515 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 24 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:00,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:48:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63727 states. [2021-12-06 18:48:04,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63727 to 61457. [2021-12-06 18:48:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61457 states, 61455 states have (on average 1.2722805304694491) internal successors, (78188), 61456 states have internal predecessors, (78188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61457 states to 61457 states and 78188 transitions. [2021-12-06 18:48:05,023 INFO L78 Accepts]: Start accepts. Automaton has 61457 states and 78188 transitions. Word has length 81 [2021-12-06 18:48:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:05,023 INFO L470 AbstractCegarLoop]: Abstraction has 61457 states and 78188 transitions. [2021-12-06 18:48:05,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 61457 states and 78188 transitions. [2021-12-06 18:48:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:48:05,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:05,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:05,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:48:05,025 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1081869670, now seen corresponding path program 1 times [2021-12-06 18:48:05,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17580080] [2021-12-06 18:48:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:05,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:48:05,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:05,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17580080] [2021-12-06 18:48:05,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17580080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:48:05,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:48:05,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:48:05,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430143789] [2021-12-06 18:48:05,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:48:05,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:48:05,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:48:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:48:05,060 INFO L87 Difference]: Start difference. First operand 61457 states and 78188 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:08,581 INFO L93 Difference]: Finished difference Result 105933 states and 134333 transitions. [2021-12-06 18:48:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:48:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:48:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:08,628 INFO L225 Difference]: With dead ends: 105933 [2021-12-06 18:48:08,628 INFO L226 Difference]: Without dead ends: 46884 [2021-12-06 18:48:08,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:48:08,653 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4582 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4582 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:08,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4582 Valid, 2987 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:48:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46884 states. [2021-12-06 18:48:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46884 to 46884. [2021-12-06 18:48:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46884 states, 46882 states have (on average 1.257540207329039) internal successors, (58956), 46883 states have internal predecessors, (58956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46884 states to 46884 states and 58956 transitions. [2021-12-06 18:48:12,229 INFO L78 Accepts]: Start accepts. Automaton has 46884 states and 58956 transitions. Word has length 81 [2021-12-06 18:48:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:12,229 INFO L470 AbstractCegarLoop]: Abstraction has 46884 states and 58956 transitions. [2021-12-06 18:48:12,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 46884 states and 58956 transitions. [2021-12-06 18:48:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:48:12,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:12,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:12,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:48:12,231 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:12,231 INFO L85 PathProgramCache]: Analyzing trace with hash -958775226, now seen corresponding path program 1 times [2021-12-06 18:48:12,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:12,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753377289] [2021-12-06 18:48:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:12,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:48:12,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753377289] [2021-12-06 18:48:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753377289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:48:12,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:48:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:48:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513816425] [2021-12-06 18:48:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:48:12,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:48:12,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:48:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:48:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:48:12,264 INFO L87 Difference]: Start difference. First operand 46884 states and 58956 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:48:15,268 INFO L93 Difference]: Finished difference Result 81948 states and 102741 transitions. [2021-12-06 18:48:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:48:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:48:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:48:15,309 INFO L225 Difference]: With dead ends: 81948 [2021-12-06 18:48:15,309 INFO L226 Difference]: Without dead ends: 37391 [2021-12-06 18:48:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:48:15,330 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4588 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4588 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:48:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4588 Valid, 2981 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:48:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37391 states. [2021-12-06 18:48:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37391 to 37391. [2021-12-06 18:48:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37391 states, 37389 states have (on average 1.2521062344539837) internal successors, (46815), 37390 states have internal predecessors, (46815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37391 states to 37391 states and 46815 transitions. [2021-12-06 18:48:18,212 INFO L78 Accepts]: Start accepts. Automaton has 37391 states and 46815 transitions. Word has length 81 [2021-12-06 18:48:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:48:18,212 INFO L470 AbstractCegarLoop]: Abstraction has 37391 states and 46815 transitions. [2021-12-06 18:48:18,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:48:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37391 states and 46815 transitions. [2021-12-06 18:48:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:48:18,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:48:18,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:48:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:48:18,214 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:48:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:48:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash 584192824, now seen corresponding path program 1 times [2021-12-06 18:48:18,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:48:18,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514472748] [2021-12-06 18:48:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:18,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:48:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:48:18,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:48:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514472748] [2021-12-06 18:48:18,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514472748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:48:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572822473] [2021-12-06 18:48:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:48:18,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:48:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:48:18,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:48:18,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:48:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:48:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:48:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:02,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:07,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572822473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:07,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:07,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 29] total 60 [2021-12-06 18:50:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042254805] [2021-12-06 18:50:07,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:07,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:50:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:50:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2966, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:50:07,377 INFO L87 Difference]: Start difference. First operand 37391 states and 46815 transitions. Second operand has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:17,269 INFO L93 Difference]: Finished difference Result 179934 states and 220689 transitions. [2021-12-06 18:52:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 463 states. [2021-12-06 18:52:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:52:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:17,451 INFO L225 Difference]: With dead ends: 179934 [2021-12-06 18:52:17,451 INFO L226 Difference]: Without dead ends: 151335 [2021-12-06 18:52:17,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125945 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=33803, Invalid=236077, Unknown=0, NotChecked=0, Total=269880 [2021-12-06 18:52:17,502 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 20245 mSDsluCounter, 21235 mSDsCounter, 0 mSdLazyCounter, 7404 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20245 SdHoareTripleChecker+Valid, 22981 SdHoareTripleChecker+Invalid, 8427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 7404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:17,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20245 Valid, 22981 Invalid, 8427 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1023 Valid, 7404 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-12-06 18:52:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151335 states. [2021-12-06 18:52:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151335 to 77280. [2021-12-06 18:52:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77280 states, 77278 states have (on average 1.2391366236186236) internal successors, (95758), 77279 states have internal predecessors, (95758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77280 states to 77280 states and 95758 transitions. [2021-12-06 18:52:26,686 INFO L78 Accepts]: Start accepts. Automaton has 77280 states and 95758 transitions. Word has length 82 [2021-12-06 18:52:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:26,686 INFO L470 AbstractCegarLoop]: Abstraction has 77280 states and 95758 transitions. [2021-12-06 18:52:26,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 77280 states and 95758 transitions. [2021-12-06 18:52:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:52:26,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:26,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:26,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:52:26,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:52:26,890 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1441826097, now seen corresponding path program 1 times [2021-12-06 18:52:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273388540] [2021-12-06 18:52:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:26,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273388540] [2021-12-06 18:52:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273388540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:26,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:52:26,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:52:26,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119982407] [2021-12-06 18:52:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:26,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:52:26,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:52:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:52:26,949 INFO L87 Difference]: Start difference. First operand 77280 states and 95758 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:31,493 INFO L93 Difference]: Finished difference Result 110288 states and 135924 transitions. [2021-12-06 18:52:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:52:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:52:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:31,534 INFO L225 Difference]: With dead ends: 110288 [2021-12-06 18:52:31,534 INFO L226 Difference]: Without dead ends: 41448 [2021-12-06 18:52:31,556 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 [2021-12-06 18:52:31,556 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 25 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:31,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3040 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:52:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41448 states. [2021-12-06 18:52:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41448 to 41446. [2021-12-06 18:52:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41446 states, 41444 states have (on average 1.217618955699257) internal successors, (50463), 41445 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41446 states to 41446 states and 50463 transitions. [2021-12-06 18:52:36,049 INFO L78 Accepts]: Start accepts. Automaton has 41446 states and 50463 transitions. Word has length 82 [2021-12-06 18:52:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:36,050 INFO L470 AbstractCegarLoop]: Abstraction has 41446 states and 50463 transitions. [2021-12-06 18:52:36,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41446 states and 50463 transitions. [2021-12-06 18:52:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:52:36,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:36,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:52:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 18:52:36,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2021-12-06 18:52:36,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:36,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781565760] [2021-12-06 18:52:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:36,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:36,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:36,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781565760] [2021-12-06 18:52:36,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781565760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:52:36,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443995728] [2021-12-06 18:52:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:36,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:52:36,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:52:36,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:52:36,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:52:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:36,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:52:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:52:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:41,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:52:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:45,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443995728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:52:45,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:52:45,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 25] total 60 [2021-12-06 18:52:45,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106982898] [2021-12-06 18:52:45,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:52:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:52:45,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:52:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3157, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:52:45,096 INFO L87 Difference]: Start difference. First operand 41446 states and 50463 transitions. Second operand has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:43,451 INFO L93 Difference]: Finished difference Result 96249 states and 113652 transitions. [2021-12-06 18:53:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2021-12-06 18:53:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 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 83 [2021-12-06 18:53:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:43,539 INFO L225 Difference]: With dead ends: 96249 [2021-12-06 18:53:43,539 INFO L226 Difference]: Without dead ends: 81117 [2021-12-06 18:53:43,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52036 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=14437, Invalid=108413, Unknown=0, NotChecked=0, Total=122850 [2021-12-06 18:53:43,563 INFO L933 BasicCegarLoop]: 1840 mSDtfsCounter, 29056 mSDsluCounter, 25960 mSDsCounter, 0 mSdLazyCounter, 5330 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29056 SdHoareTripleChecker+Valid, 27800 SdHoareTripleChecker+Invalid, 5918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 5330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:43,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29056 Valid, 27800 Invalid, 5918 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [588 Valid, 5330 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 18:53:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81117 states. [2021-12-06 18:53:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81117 to 38349. [2021-12-06 18:53:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38349 states, 38347 states have (on average 1.219104493180692) internal successors, (46749), 38348 states have internal predecessors, (46749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38349 states to 38349 states and 46749 transitions. [2021-12-06 18:53:48,907 INFO L78 Accepts]: Start accepts. Automaton has 38349 states and 46749 transitions. Word has length 83 [2021-12-06 18:53:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:48,907 INFO L470 AbstractCegarLoop]: Abstraction has 38349 states and 46749 transitions. [2021-12-06 18:53:48,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 38349 states and 46749 transitions. [2021-12-06 18:53:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:53:48,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:48,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:53:48,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:53:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:53:49,110 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1931323970, now seen corresponding path program 1 times [2021-12-06 18:53:49,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092532824] [2021-12-06 18:53:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:49,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:49,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092532824] [2021-12-06 18:53:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092532824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:53:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633234423] [2021-12-06 18:53:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:49,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:53:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:53:49,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:53:49,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee30139d-d5e5-4ac9-abc3-63c567b7d7af/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:53:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 18:53:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:53:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:54,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:03,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633234423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:03,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:03,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 31, 29] total 70 [2021-12-06 18:54:03,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281714030] [2021-12-06 18:54:03,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:03,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:54:03,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:54:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4376, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:54:03,768 INFO L87 Difference]: Start difference. First operand 38349 states and 46749 transitions. Second operand has 70 states, 70 states have (on average 3.257142857142857) internal successors, (228), 70 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)