./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2043c9d5e1443059c92e4f987d5fa7d95d911c8e5885f3f6e6b42c76d53791e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:48:01,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:48:01,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:48:01,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:48:01,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:48:01,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:48:01,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:48:01,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:48:01,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:48:01,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:48:01,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:48:01,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:48:01,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:48:01,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:48:01,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:48:01,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:48:01,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:48:01,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:48:01,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:48:01,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:48:01,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:48:01,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:48:01,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:48:01,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:48:01,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:48:01,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:48:01,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:48:01,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:48:01,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:48:01,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:48:01,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:48:01,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:48:01,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:48:01,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:48:01,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:48:01,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:48:01,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:48:01,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:48:01,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:48:01,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:48:01,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:48:01,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:48:01,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:48:01,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:48:01,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:48:01,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:48:01,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:48:01,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:48:01,652 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:48:01,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:48:01,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:48:01,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:48:01,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:48:01,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:48:01,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:48:01,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:48:01,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:48:01,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:48:01,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:48:01,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:48:01,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:48:01,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:48:01,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:48:01,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:48:01,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:01,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:48:01,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:48:01,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:48:01,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:48:01,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:48:01,660 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:48:01,661 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:48:01,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:48:01,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:48:01,662 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_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2043c9d5e1443059c92e4f987d5fa7d95d911c8e5885f3f6e6b42c76d53791e0 [2021-11-09 10:48:01,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:48:01,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:48:01,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:48:01,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:48:01,996 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:48:01,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem19_label07.c [2021-11-09 10:48:02,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/data/3ab1acaeb/a2cf69f669e041e8963d82318a2b4c68/FLAG030386301 [2021-11-09 10:48:03,258 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:48:03,260 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/sv-benchmarks/c/eca-rers2012/Problem19_label07.c [2021-11-09 10:48:03,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/data/3ab1acaeb/a2cf69f669e041e8963d82318a2b4c68/FLAG030386301 [2021-11-09 10:48:03,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/data/3ab1acaeb/a2cf69f669e041e8963d82318a2b4c68 [2021-11-09 10:48:03,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:48:03,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:48:03,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:03,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:48:03,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:48:03,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:03" (1/1) ... [2021-11-09 10:48:03,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad17792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:03, skipping insertion in model container [2021-11-09 10:48:03,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:03" (1/1) ... [2021-11-09 10:48:03,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:48:03,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:48:04,236 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/sv-benchmarks/c/eca-rers2012/Problem19_label07.c[7920,7933] [2021-11-09 10:48:06,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:06,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:48:06,236 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/sv-benchmarks/c/eca-rers2012/Problem19_label07.c[7920,7933] [2021-11-09 10:48:07,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:07,529 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:48:07,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07 WrapperNode [2021-11-09 10:48:07,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:07,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:48:07,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:48:07,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:48:07,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:07,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:08,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:48:08,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:48:08,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:48:08,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:48:08,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:08,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:08,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:08,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:09,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:09,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:09,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:10,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:48:10,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:48:10,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:48:10,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:48:10,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (1/1) ... [2021-11-09 10:48:10,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:10,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:48:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:48:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:48:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:48:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:48:10,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:48:21,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:48:21,062 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-09 10:48:21,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:21 BoogieIcfgContainer [2021-11-09 10:48:21,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:48:21,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:48:21,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:48:21,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:48:21,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:03" (1/3) ... [2021-11-09 10:48:21,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0434c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:21, skipping insertion in model container [2021-11-09 10:48:21,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:07" (2/3) ... [2021-11-09 10:48:21,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d0434c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:21, skipping insertion in model container [2021-11-09 10:48:21,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:21" (3/3) ... [2021-11-09 10:48:21,085 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label07.c [2021-11-09 10:48:21,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:48:21,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:48:21,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:48:21,299 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:48:21,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:48:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:48:21,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:21,405 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:21,406 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-11-09 10:48:21,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:21,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654968658] [2021-11-09 10:48:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:21,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:22,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:22,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654968658] [2021-11-09 10:48:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654968658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:22,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:22,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:22,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739814652] [2021-11-09 10:48:22,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:22,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:22,198 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:41,732 INFO L93 Difference]: Finished difference Result 6284 states and 12039 transitions. [2021-11-09 10:48:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:41,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:48:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:41,790 INFO L225 Difference]: With dead ends: 6284 [2021-11-09 10:48:41,790 INFO L226 Difference]: Without dead ends: 4467 [2021-11-09 10:48:41,799 INFO L786 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 [2021-11-09 10:48:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-11-09 10:48:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4465. [2021-11-09 10:48:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 1.564516129032258) internal successors, (6984), 4464 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 6984 transitions. [2021-11-09 10:48:42,023 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 6984 transitions. Word has length 61 [2021-11-09 10:48:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:42,024 INFO L470 AbstractCegarLoop]: Abstraction has 4465 states and 6984 transitions. [2021-11-09 10:48:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 6984 transitions. [2021-11-09 10:48:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-09 10:48:42,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:42,035 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:48:42,036 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1440280171, now seen corresponding path program 1 times [2021-11-09 10:48:42,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:42,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39098859] [2021-11-09 10:48:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:42,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:42,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:42,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39098859] [2021-11-09 10:48:42,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39098859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:42,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:42,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:42,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410783136] [2021-11-09 10:48:42,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:42,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:42,515 INFO L87 Difference]: Start difference. First operand 4465 states and 6984 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:58,795 INFO L93 Difference]: Finished difference Result 11706 states and 20175 transitions. [2021-11-09 10:48:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 268 [2021-11-09 10:48:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:58,861 INFO L225 Difference]: With dead ends: 11706 [2021-11-09 10:48:58,862 INFO L226 Difference]: Without dead ends: 8608 [2021-11-09 10:48:58,869 INFO L786 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 [2021-11-09 10:48:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-11-09 10:48:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 8594. [2021-11-09 10:48:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 1.3480740137321074) internal successors, (11584), 8593 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11584 transitions. [2021-11-09 10:48:59,136 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11584 transitions. Word has length 268 [2021-11-09 10:48:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:59,137 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 11584 transitions. [2021-11-09 10:48:59,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11584 transitions. [2021-11-09 10:48:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-09 10:48:59,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:59,145 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:59,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:48:59,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:59,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash -862057391, now seen corresponding path program 1 times [2021-11-09 10:48:59,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:59,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151369696] [2021-11-09 10:48:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:59,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:59,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151369696] [2021-11-09 10:48:59,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151369696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:59,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:59,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:48:59,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671550623] [2021-11-09 10:48:59,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:59,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:59,587 INFO L87 Difference]: Start difference. First operand 8594 states and 11584 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:08,078 INFO L93 Difference]: Finished difference Result 14487 states and 20449 transitions. [2021-11-09 10:49:08,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 296 [2021-11-09 10:49:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:08,131 INFO L225 Difference]: With dead ends: 14487 [2021-11-09 10:49:08,131 INFO L226 Difference]: Without dead ends: 8594 [2021-11-09 10:49:08,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8594 states. [2021-11-09 10:49:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8594 to 8594. [2021-11-09 10:49:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8594 states, 8593 states have (on average 1.3465611544280227) internal successors, (11571), 8593 states have internal predecessors, (11571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11571 transitions. [2021-11-09 10:49:08,457 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11571 transitions. Word has length 296 [2021-11-09 10:49:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:08,459 INFO L470 AbstractCegarLoop]: Abstraction has 8594 states and 11571 transitions. [2021-11-09 10:49:08,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11571 transitions. [2021-11-09 10:49:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-09 10:49:08,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:08,482 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:08,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:49:08,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1175205269, now seen corresponding path program 1 times [2021-11-09 10:49:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57100555] [2021-11-09 10:49:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:08,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 10:49:09,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:09,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57100555] [2021-11-09 10:49:09,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57100555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:09,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:09,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:49:09,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462862673] [2021-11-09 10:49:09,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:09,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:09,183 INFO L87 Difference]: Start difference. First operand 8594 states and 11571 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:17,985 INFO L93 Difference]: Finished difference Result 20123 states and 28981 transitions. [2021-11-09 10:49:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 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 617 [2021-11-09 10:49:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:18,065 INFO L225 Difference]: With dead ends: 20123 [2021-11-09 10:49:18,065 INFO L226 Difference]: Without dead ends: 14261 [2021-11-09 10:49:18,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14261 states. [2021-11-09 10:49:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14261 to 14244. [2021-11-09 10:49:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14244 states, 14243 states have (on average 1.2722038896299936) internal successors, (18120), 14243 states have internal predecessors, (18120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14244 states to 14244 states and 18120 transitions. [2021-11-09 10:49:18,481 INFO L78 Accepts]: Start accepts. Automaton has 14244 states and 18120 transitions. Word has length 617 [2021-11-09 10:49:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:18,483 INFO L470 AbstractCegarLoop]: Abstraction has 14244 states and 18120 transitions. [2021-11-09 10:49:18,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 14244 states and 18120 transitions. [2021-11-09 10:49:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-11-09 10:49:18,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:18,507 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:18,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:49:18,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash 848910986, now seen corresponding path program 1 times [2021-11-09 10:49:18,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:18,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595230073] [2021-11-09 10:49:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:18,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:49:18,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:18,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595230073] [2021-11-09 10:49:18,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595230073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:18,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:18,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:49:18,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226816581] [2021-11-09 10:49:18,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:18,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:18,957 INFO L87 Difference]: Start difference. First operand 14244 states and 18120 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:27,085 INFO L93 Difference]: Finished difference Result 28511 states and 37629 transitions. [2021-11-09 10:49:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 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 622 [2021-11-09 10:49:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:27,136 INFO L225 Difference]: With dead ends: 28511 [2021-11-09 10:49:27,136 INFO L226 Difference]: Without dead ends: 16999 [2021-11-09 10:49:27,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16999 states. [2021-11-09 10:49:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16999 to 16985. [2021-11-09 10:49:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16985 states, 16984 states have (on average 1.2707253886010363) internal successors, (21582), 16984 states have internal predecessors, (21582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16985 states to 16985 states and 21582 transitions. [2021-11-09 10:49:27,516 INFO L78 Accepts]: Start accepts. Automaton has 16985 states and 21582 transitions. Word has length 622 [2021-11-09 10:49:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:27,517 INFO L470 AbstractCegarLoop]: Abstraction has 16985 states and 21582 transitions. [2021-11-09 10:49:27,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16985 states and 21582 transitions. [2021-11-09 10:49:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2021-11-09 10:49:27,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:27,543 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:27,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:49:27,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1288083713, now seen corresponding path program 1 times [2021-11-09 10:49:27,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:27,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647741627] [2021-11-09 10:49:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:27,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:49:28,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:28,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647741627] [2021-11-09 10:49:28,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647741627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:28,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:28,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:49:28,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311019186] [2021-11-09 10:49:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:28,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:28,101 INFO L87 Difference]: Start difference. First operand 16985 states and 21582 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:38,250 INFO L93 Difference]: Finished difference Result 43710 states and 57265 transitions. [2021-11-09 10:49:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 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 625 [2021-11-09 10:49:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:38,324 INFO L225 Difference]: With dead ends: 43710 [2021-11-09 10:49:38,325 INFO L226 Difference]: Without dead ends: 29457 [2021-11-09 10:49:38,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29457 states. [2021-11-09 10:49:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29457 to 29454. [2021-11-09 10:49:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29454 states, 29453 states have (on average 1.255593657691916) internal successors, (36981), 29453 states have internal predecessors, (36981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29454 states to 29454 states and 36981 transitions. [2021-11-09 10:49:38,954 INFO L78 Accepts]: Start accepts. Automaton has 29454 states and 36981 transitions. Word has length 625 [2021-11-09 10:49:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:38,955 INFO L470 AbstractCegarLoop]: Abstraction has 29454 states and 36981 transitions. [2021-11-09 10:49:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 29454 states and 36981 transitions. [2021-11-09 10:49:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2021-11-09 10:49:38,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:38,964 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:38,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:49:38,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1902908419, now seen corresponding path program 1 times [2021-11-09 10:49:38,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:38,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964060485] [2021-11-09 10:49:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:38,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:39,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:39,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964060485] [2021-11-09 10:49:39,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964060485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:39,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:39,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:49:39,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996793804] [2021-11-09 10:49:39,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:49:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:49:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:39,589 INFO L87 Difference]: Start difference. First operand 29454 states and 36981 transitions. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:51,925 INFO L93 Difference]: Finished difference Result 63037 states and 78523 transitions. [2021-11-09 10:49:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:49:51,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 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 652 [2021-11-09 10:49:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:52,004 INFO L225 Difference]: With dead ends: 63037 [2021-11-09 10:49:52,004 INFO L226 Difference]: Without dead ends: 36289 [2021-11-09 10:49:52,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36289 states. [2021-11-09 10:49:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36289 to 34921. [2021-11-09 10:49:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34921 states, 34920 states have (on average 1.2223654066437573) internal successors, (42685), 34920 states have internal predecessors, (42685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34921 states to 34921 states and 42685 transitions. [2021-11-09 10:49:52,585 INFO L78 Accepts]: Start accepts. Automaton has 34921 states and 42685 transitions. Word has length 652 [2021-11-09 10:49:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:52,586 INFO L470 AbstractCegarLoop]: Abstraction has 34921 states and 42685 transitions. [2021-11-09 10:49:52,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 34921 states and 42685 transitions. [2021-11-09 10:49:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2021-11-09 10:49:52,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:52,601 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:52,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:49:52,601 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1001552943, now seen corresponding path program 1 times [2021-11-09 10:49:52,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:52,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097030026] [2021-11-09 10:49:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:52,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-09 10:49:53,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097030026] [2021-11-09 10:49:53,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097030026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:53,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:53,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:49:53,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480329149] [2021-11-09 10:49:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:53,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:53,289 INFO L87 Difference]: Start difference. First operand 34921 states and 42685 transitions. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:02,967 INFO L93 Difference]: Finished difference Result 95887 states and 118921 transitions. [2021-11-09 10:50:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 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 854 [2021-11-09 10:50:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:03,094 INFO L225 Difference]: With dead ends: 95887 [2021-11-09 10:50:03,094 INFO L226 Difference]: Without dead ends: 63698 [2021-11-09 10:50:03,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63698 states. [2021-11-09 10:50:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63698 to 58132. [2021-11-09 10:50:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58132 states, 58131 states have (on average 1.2501247183086477) internal successors, (72671), 58131 states have internal predecessors, (72671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58132 states to 58132 states and 72671 transitions. [2021-11-09 10:50:04,959 INFO L78 Accepts]: Start accepts. Automaton has 58132 states and 72671 transitions. Word has length 854 [2021-11-09 10:50:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:04,960 INFO L470 AbstractCegarLoop]: Abstraction has 58132 states and 72671 transitions. [2021-11-09 10:50:04,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58132 states and 72671 transitions. [2021-11-09 10:50:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2021-11-09 10:50:05,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:05,030 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:05,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:50:05,031 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash 875543964, now seen corresponding path program 1 times [2021-11-09 10:50:05,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:05,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431095238] [2021-11-09 10:50:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:05,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 961 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-11-09 10:50:05,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:05,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431095238] [2021-11-09 10:50:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431095238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:05,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:05,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:50:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266941160] [2021-11-09 10:50:05,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:05,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:05,912 INFO L87 Difference]: Start difference. First operand 58132 states and 72671 transitions. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:22,877 INFO L93 Difference]: Finished difference Result 194287 states and 248068 transitions. [2021-11-09 10:50:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:50:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 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 1069 [2021-11-09 10:50:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:23,098 INFO L225 Difference]: With dead ends: 194287 [2021-11-09 10:50:23,098 INFO L226 Difference]: Without dead ends: 138887 [2021-11-09 10:50:23,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138887 states. [2021-11-09 10:50:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138887 to 137406. [2021-11-09 10:50:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137406 states, 137405 states have (on average 1.2155816746115498) internal successors, (167027), 137405 states have internal predecessors, (167027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137406 states to 137406 states and 167027 transitions. [2021-11-09 10:50:25,901 INFO L78 Accepts]: Start accepts. Automaton has 137406 states and 167027 transitions. Word has length 1069 [2021-11-09 10:50:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:25,902 INFO L470 AbstractCegarLoop]: Abstraction has 137406 states and 167027 transitions. [2021-11-09 10:50:25,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 137406 states and 167027 transitions. [2021-11-09 10:50:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1146 [2021-11-09 10:50:25,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:25,938 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:25,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:50:25,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1897078910, now seen corresponding path program 1 times [2021-11-09 10:50:25,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:25,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770521846] [2021-11-09 10:50:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:25,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1808 backedges. 1159 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-11-09 10:50:26,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:26,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770521846] [2021-11-09 10:50:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770521846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:26,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:50:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26665676] [2021-11-09 10:50:26,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:26,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:26,985 INFO L87 Difference]: Start difference. First operand 137406 states and 167027 transitions. Second operand has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:36,666 INFO L93 Difference]: Finished difference Result 296657 states and 363107 transitions. [2021-11-09 10:50:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 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 1145 [2021-11-09 10:50:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:36,950 INFO L225 Difference]: With dead ends: 296657 [2021-11-09 10:50:36,950 INFO L226 Difference]: Without dead ends: 170177 [2021-11-09 10:50:37,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170177 states. [2021-11-09 10:50:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170177 to 167431. [2021-11-09 10:50:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167431 states, 167430 states have (on average 1.1870094965060025) internal successors, (198741), 167430 states have internal predecessors, (198741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167431 states to 167431 states and 198741 transitions. [2021-11-09 10:50:40,194 INFO L78 Accepts]: Start accepts. Automaton has 167431 states and 198741 transitions. Word has length 1145 [2021-11-09 10:50:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:40,195 INFO L470 AbstractCegarLoop]: Abstraction has 167431 states and 198741 transitions. [2021-11-09 10:50:40,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 167431 states and 198741 transitions. [2021-11-09 10:50:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2021-11-09 10:50:40,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:40,268 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:40,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:50:40,268 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1646233552, now seen corresponding path program 1 times [2021-11-09 10:50:40,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:40,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729173637] [2021-11-09 10:50:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:40,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 383 proven. 668 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-09 10:50:41,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:41,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729173637] [2021-11-09 10:50:41,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729173637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:41,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500139599] [2021-11-09 10:50:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:41,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:41,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:41,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:50:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:50:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 864 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-09 10:50:47,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500139599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:47,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:50:47,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 10:50:47,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469568478] [2021-11-09 10:50:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:50:47,460 INFO L87 Difference]: Start difference. First operand 167431 states and 198741 transitions. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:57,566 INFO L93 Difference]: Finished difference Result 349877 states and 416695 transitions. [2021-11-09 10:50:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:57,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 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 1180 [2021-11-09 10:50:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:57,944 INFO L225 Difference]: With dead ends: 349877 [2021-11-09 10:50:57,944 INFO L226 Difference]: Without dead ends: 182448 [2021-11-09 10:50:57,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:50:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182448 states. [2021-11-09 10:51:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182448 to 178335. [2021-11-09 10:51:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178335 states, 178334 states have (on average 1.1695694595534223) internal successors, (208574), 178334 states have internal predecessors, (208574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178335 states to 178335 states and 208574 transitions. [2021-11-09 10:51:00,690 INFO L78 Accepts]: Start accepts. Automaton has 178335 states and 208574 transitions. Word has length 1180 [2021-11-09 10:51:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:00,691 INFO L470 AbstractCegarLoop]: Abstraction has 178335 states and 208574 transitions. [2021-11-09 10:51:00,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 178335 states and 208574 transitions. [2021-11-09 10:51:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1181 [2021-11-09 10:51:01,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:01,249 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:01,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:01,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:51:01,450 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -406416994, now seen corresponding path program 1 times [2021-11-09 10:51:01,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:01,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840920588] [2021-11-09 10:51:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 1124 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-09 10:51:02,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:02,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840920588] [2021-11-09 10:51:02,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840920588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:02,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:02,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:02,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737701043] [2021-11-09 10:51:02,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:02,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:02,332 INFO L87 Difference]: Start difference. First operand 178335 states and 208574 transitions. Second operand has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:14,618 INFO L93 Difference]: Finished difference Result 437322 states and 512030 transitions. [2021-11-09 10:51:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 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 1180 [2021-11-09 10:51:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:14,977 INFO L225 Difference]: With dead ends: 437322 [2021-11-09 10:51:14,977 INFO L226 Difference]: Without dead ends: 261719 [2021-11-09 10:51:15,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261719 states. [2021-11-09 10:51:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261719 to 227469. [2021-11-09 10:51:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227469 states, 227468 states have (on average 1.1818585471363006) internal successors, (268835), 227468 states have internal predecessors, (268835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227469 states to 227469 states and 268835 transitions. [2021-11-09 10:51:19,052 INFO L78 Accepts]: Start accepts. Automaton has 227469 states and 268835 transitions. Word has length 1180 [2021-11-09 10:51:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:19,053 INFO L470 AbstractCegarLoop]: Abstraction has 227469 states and 268835 transitions. [2021-11-09 10:51:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 227469 states and 268835 transitions. [2021-11-09 10:51:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2021-11-09 10:51:19,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:19,880 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:19,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:51:19,881 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1210580696, now seen corresponding path program 1 times [2021-11-09 10:51:19,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:19,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008282932] [2021-11-09 10:51:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:19,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 1466 proven. 63 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-11-09 10:51:21,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:21,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008282932] [2021-11-09 10:51:21,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008282932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:21,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105219853] [2021-11-09 10:51:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:21,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:21,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:51:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:51:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1986 backedges. 1466 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-09 10:51:26,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105219853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:26,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:51:26,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2021-11-09 10:51:26,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835875657] [2021-11-09 10:51:26,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:26,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:51:26,250 INFO L87 Difference]: Start difference. First operand 227469 states and 268835 transitions. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:38,496 INFO L93 Difference]: Finished difference Result 526063 states and 621950 transitions. [2021-11-09 10:51:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:38,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 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 1236 [2021-11-09 10:51:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:39,066 INFO L225 Difference]: With dead ends: 526063 [2021-11-09 10:51:39,067 INFO L226 Difference]: Without dead ends: 301326 [2021-11-09 10:51:39,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:51:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301326 states. [2021-11-09 10:51:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301326 to 298459. [2021-11-09 10:51:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298459 states, 298458 states have (on average 1.1697726313250105) internal successors, (349128), 298458 states have internal predecessors, (349128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298459 states to 298459 states and 349128 transitions. [2021-11-09 10:51:44,506 INFO L78 Accepts]: Start accepts. Automaton has 298459 states and 349128 transitions. Word has length 1236 [2021-11-09 10:51:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:44,507 INFO L470 AbstractCegarLoop]: Abstraction has 298459 states and 349128 transitions. [2021-11-09 10:51:44,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 298459 states and 349128 transitions. [2021-11-09 10:51:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2021-11-09 10:51:44,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:44,545 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:44,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:44,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06b030f-7a6c-4d9e-bd0e-49c81a188e01/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:51:44,748 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1628116898, now seen corresponding path program 1 times [2021-11-09 10:51:44,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:44,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008036846] [2021-11-09 10:51:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:44,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2009 backedges. 1360 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-11-09 10:51:46,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:46,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008036846] [2021-11-09 10:51:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008036846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:46,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:51:46,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921236798] [2021-11-09 10:51:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:51:46,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:51:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:51:46,609 INFO L87 Difference]: Start difference. First operand 298459 states and 349128 transitions. Second operand has 4 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)