./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU --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 708f088db085ec098a8544d76f8abbece9dbe61a183e0bc1703749c9af891b6b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:09:34,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:09:34,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:09:34,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:09:34,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:09:34,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:09:34,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:09:34,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:09:34,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:09:34,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:09:34,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:09:34,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:09:34,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:09:34,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:09:34,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:09:34,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:09:34,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:09:34,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:09:34,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:09:34,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:09:34,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:09:34,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:09:34,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:09:34,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:09:34,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:09:34,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:09:34,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:09:34,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:09:34,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:09:34,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:09:34,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:09:34,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:09:34,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:09:34,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:09:34,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:09:34,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:09:34,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:09:34,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:09:34,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:09:34,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:09:34,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:09:34,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:09:34,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:09:34,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:09:34,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:09:34,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:09:34,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:09:34,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:09:34,845 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:09:34,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:09:34,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:09:34,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:09:34,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:09:34,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:09:34,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:09:34,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:09:34,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:09:34,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:09:34,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:09:34,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:34,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:09:34,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:09:34,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:09:34,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:09:34,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:09:34,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:09:34,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:09:34,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:09:34,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:09:34,850 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_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 708f088db085ec098a8544d76f8abbece9dbe61a183e0bc1703749c9af891b6b [2021-11-02 22:09:35,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:09:35,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:09:35,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:09:35,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:09:35,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:09:35,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-11-02 22:09:35,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/data/87d0c17b1/810843323c0a4fdbb2bc180ed99b058a/FLAG27cbb0e0b [2021-11-02 22:09:35,743 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:09:35,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-11-02 22:09:35,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/data/87d0c17b1/810843323c0a4fdbb2bc180ed99b058a/FLAG27cbb0e0b [2021-11-02 22:09:36,081 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/data/87d0c17b1/810843323c0a4fdbb2bc180ed99b058a [2021-11-02 22:09:36,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:09:36,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:09:36,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:36,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:09:36,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:09:36,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e4b2ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36, skipping insertion in model container [2021-11-02 22:09:36,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:09:36,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:09:36,348 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_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c[12764,12777] [2021-11-02 22:09:36,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:36,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:09:36,448 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_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c[12764,12777] [2021-11-02 22:09:36,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:36,477 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:09:36,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36 WrapperNode [2021-11-02 22:09:36,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:36,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:36,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:09:36,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:09:36,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:36,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:09:36,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:09:36,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:09:36,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:09:36,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:09:36,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:09:36,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:09:36,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (1/1) ... [2021-11-02 22:09:36,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:36,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:09:36,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f991a66-f8e6-4578-ac2b-472f8cf4c4ab/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:09:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:09:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:09:36,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:09:36,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:09:37,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:09:37,443 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:09:37,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:37 BoogieIcfgContainer [2021-11-02 22:09:37,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:09:37,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:09:37,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:09:37,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:09:37,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:09:36" (1/3) ... [2021-11-02 22:09:37,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a61448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:37, skipping insertion in model container [2021-11-02 22:09:37,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:36" (2/3) ... [2021-11-02 22:09:37,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a61448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:37, skipping insertion in model container [2021-11-02 22:09:37,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:37" (3/3) ... [2021-11-02 22:09:37,455 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c [2021-11-02 22:09:37,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:09:37,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:09:37,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:09:37,552 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 [2021-11-02 22:09:37,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:09:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:09:37,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:37,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:37,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2021-11-02 22:09:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:37,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009203924] [2021-11-02 22:09:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:37,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:37,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:37,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009203924] [2021-11-02 22:09:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009203924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:37,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:37,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:09:37,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868818992] [2021-11-02 22:09:37,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:09:37,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:09:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:09:37,930 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:37,960 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2021-11-02 22:09:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:09:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:09:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:37,974 INFO L225 Difference]: With dead ends: 206 [2021-11-02 22:09:37,974 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:09:37,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:09:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:09:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-02 22:09:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2021-11-02 22:09:38,025 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2021-11-02 22:09:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:38,026 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2021-11-02 22:09:38,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2021-11-02 22:09:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:09:38,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:38,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:09:38,030 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:38,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2021-11-02 22:09:38,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:38,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283162049] [2021-11-02 22:09:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:38,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:38,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:38,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283162049] [2021-11-02 22:09:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283162049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:38,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:38,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:09:38,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103007286] [2021-11-02 22:09:38,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:09:38,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:09:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:38,191 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:38,302 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2021-11-02 22:09:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:09:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:09:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:38,306 INFO L225 Difference]: With dead ends: 271 [2021-11-02 22:09:38,306 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 22:09:38,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:09:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 22:09:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2021-11-02 22:09:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5317460317460319) internal successors, (193), 126 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2021-11-02 22:09:38,321 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2021-11-02 22:09:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:38,322 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2021-11-02 22:09:38,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2021-11-02 22:09:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:09:38,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:38,325 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:38,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:09:38,326 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2021-11-02 22:09:38,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:38,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686674994] [2021-11-02 22:09:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:38,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:38,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:38,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686674994] [2021-11-02 22:09:38,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686674994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:38,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:38,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:38,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231355883] [2021-11-02 22:09:38,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:38,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,459 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:38,510 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2021-11-02 22:09:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:09:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:38,514 INFO L225 Difference]: With dead ends: 258 [2021-11-02 22:09:38,514 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 22:09:38,515 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 [2021-11-02 22:09:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 22:09:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-02 22:09:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 185 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2021-11-02 22:09:38,541 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2021-11-02 22:09:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2021-11-02 22:09:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2021-11-02 22:09:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:09:38,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:38,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:38,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:09:38,551 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2021-11-02 22:09:38,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:38,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666657081] [2021-11-02 22:09:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:38,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:38,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:38,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666657081] [2021-11-02 22:09:38,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666657081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:38,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:38,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:38,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011621548] [2021-11-02 22:09:38,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:38,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,651 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:38,676 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2021-11-02 22:09:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:38,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:09:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:38,679 INFO L225 Difference]: With dead ends: 313 [2021-11-02 22:09:38,679 INFO L226 Difference]: Without dead ends: 243 [2021-11-02 22:09:38,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-02 22:09:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2021-11-02 22:09:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5833333333333333) internal successors, (380), 240 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2021-11-02 22:09:38,697 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2021-11-02 22:09:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:38,698 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2021-11-02 22:09:38,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2021-11-02 22:09:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:09:38,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:38,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:38,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:09:38,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2021-11-02 22:09:38,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:38,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971322054] [2021-11-02 22:09:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:38,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:38,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:38,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971322054] [2021-11-02 22:09:38,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971322054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:38,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:38,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:38,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569638466] [2021-11-02 22:09:38,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:38,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,778 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:38,805 INFO L93 Difference]: Finished difference Result 584 states and 947 transitions. [2021-11-02 22:09:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:09:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:38,809 INFO L225 Difference]: With dead ends: 584 [2021-11-02 22:09:38,809 INFO L226 Difference]: Without dead ends: 402 [2021-11-02 22:09:38,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-02 22:09:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2021-11-02 22:09:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.6040100250626566) internal successors, (640), 399 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 640 transitions. [2021-11-02 22:09:38,839 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 640 transitions. Word has length 65 [2021-11-02 22:09:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:38,840 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 640 transitions. [2021-11-02 22:09:38,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 640 transitions. [2021-11-02 22:09:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:09:38,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:38,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:38,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:09:38,842 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2021-11-02 22:09:38,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:38,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716078772] [2021-11-02 22:09:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:38,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:38,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:38,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716078772] [2021-11-02 22:09:38,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716078772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:38,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:38,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502062048] [2021-11-02 22:09:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:38,914 INFO L87 Difference]: Start difference. First operand 400 states and 640 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:38,958 INFO L93 Difference]: Finished difference Result 729 states and 1183 transitions. [2021-11-02 22:09:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:38,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-02 22:09:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:38,982 INFO L225 Difference]: With dead ends: 729 [2021-11-02 22:09:38,982 INFO L226 Difference]: Without dead ends: 547 [2021-11-02 22:09:38,983 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 [2021-11-02 22:09:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-02 22:09:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2021-11-02 22:09:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.6084558823529411) internal successors, (875), 544 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 875 transitions. [2021-11-02 22:09:39,018 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 875 transitions. Word has length 67 [2021-11-02 22:09:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:39,025 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 875 transitions. [2021-11-02 22:09:39,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 875 transitions. [2021-11-02 22:09:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:09:39,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:39,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:39,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:09:39,031 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2021-11-02 22:09:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:39,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118976278] [2021-11-02 22:09:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:39,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:39,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:39,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118976278] [2021-11-02 22:09:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118976278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:39,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010952748] [2021-11-02 22:09:39,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:39,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:39,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:39,211 INFO L87 Difference]: Start difference. First operand 545 states and 875 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:39,265 INFO L93 Difference]: Finished difference Result 1434 states and 2326 transitions. [2021-11-02 22:09:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-02 22:09:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:39,274 INFO L225 Difference]: With dead ends: 1434 [2021-11-02 22:09:39,274 INFO L226 Difference]: Without dead ends: 958 [2021-11-02 22:09:39,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-02 22:09:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2021-11-02 22:09:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.6041884816753926) internal successors, (1532), 955 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1532 transitions. [2021-11-02 22:09:39,324 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1532 transitions. Word has length 67 [2021-11-02 22:09:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:39,326 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1532 transitions. [2021-11-02 22:09:39,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1532 transitions. [2021-11-02 22:09:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:09:39,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:39,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:39,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:09:39,328 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2021-11-02 22:09:39,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:39,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720715696] [2021-11-02 22:09:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:39,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:39,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:39,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720715696] [2021-11-02 22:09:39,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720715696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:39,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:39,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873528311] [2021-11-02 22:09:39,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:39,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:39,414 INFO L87 Difference]: Start difference. First operand 956 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:39,460 INFO L93 Difference]: Finished difference Result 1783 states and 2881 transitions. [2021-11-02 22:09:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-02 22:09:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:39,469 INFO L225 Difference]: With dead ends: 1783 [2021-11-02 22:09:39,469 INFO L226 Difference]: Without dead ends: 1307 [2021-11-02 22:09:39,471 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 [2021-11-02 22:09:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-11-02 22:09:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2021-11-02 22:09:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.5996932515337423) internal successors, (2086), 1304 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2086 transitions. [2021-11-02 22:09:39,544 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2086 transitions. Word has length 69 [2021-11-02 22:09:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:39,545 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 2086 transitions. [2021-11-02 22:09:39,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2086 transitions. [2021-11-02 22:09:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:09:39,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:39,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:09:39,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2021-11-02 22:09:39,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:39,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221625121] [2021-11-02 22:09:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:39,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:39,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221625121] [2021-11-02 22:09:39,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221625121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:39,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:39,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:09:39,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523150574] [2021-11-02 22:09:39,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:09:39,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:09:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:39,699 INFO L87 Difference]: Start difference. First operand 1305 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:40,012 INFO L93 Difference]: Finished difference Result 6582 states and 10723 transitions. [2021-11-02 22:09:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:09:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-02 22:09:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:40,050 INFO L225 Difference]: With dead ends: 6582 [2021-11-02 22:09:40,050 INFO L226 Difference]: Without dead ends: 5356 [2021-11-02 22:09:40,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:09:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2021-11-02 22:09:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 2452. [2021-11-02 22:09:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.5968992248062015) internal successors, (3914), 2451 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3914 transitions. [2021-11-02 22:09:40,222 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3914 transitions. Word has length 69 [2021-11-02 22:09:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:40,223 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3914 transitions. [2021-11-02 22:09:40,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3914 transitions. [2021-11-02 22:09:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:09:40,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:40,224 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:40,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:09:40,225 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2021-11-02 22:09:40,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:40,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106568593] [2021-11-02 22:09:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:40,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:40,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:40,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106568593] [2021-11-02 22:09:40,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106568593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:40,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:40,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:40,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819268776] [2021-11-02 22:09:40,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:40,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:40,321 INFO L87 Difference]: Start difference. First operand 2452 states and 3914 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:40,562 INFO L93 Difference]: Finished difference Result 7943 states and 12835 transitions. [2021-11-02 22:09:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-02 22:09:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:40,596 INFO L225 Difference]: With dead ends: 7943 [2021-11-02 22:09:40,596 INFO L226 Difference]: Without dead ends: 5570 [2021-11-02 22:09:40,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-11-02 22:09:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3992. [2021-11-02 22:09:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 1.5995990979704335) internal successors, (6384), 3991 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6384 transitions. [2021-11-02 22:09:40,829 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6384 transitions. Word has length 70 [2021-11-02 22:09:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:40,829 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6384 transitions. [2021-11-02 22:09:40,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6384 transitions. [2021-11-02 22:09:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:09:40,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:40,831 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:40,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:09:40,832 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2021-11-02 22:09:40,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:40,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384185304] [2021-11-02 22:09:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:40,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:40,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384185304] [2021-11-02 22:09:40,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384185304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:40,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:40,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:40,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152338716] [2021-11-02 22:09:40,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:40,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:40,904 INFO L87 Difference]: Start difference. First operand 3992 states and 6384 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:41,275 INFO L93 Difference]: Finished difference Result 12755 states and 20495 transitions. [2021-11-02 22:09:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-02 22:09:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:41,347 INFO L225 Difference]: With dead ends: 12755 [2021-11-02 22:09:41,347 INFO L226 Difference]: Without dead ends: 8842 [2021-11-02 22:09:41,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8842 states. [2021-11-02 22:09:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8842 to 6388. [2021-11-02 22:09:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6388 states, 6387 states have (on average 1.5913574448097698) internal successors, (10164), 6387 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 10164 transitions. [2021-11-02 22:09:41,729 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 10164 transitions. Word has length 71 [2021-11-02 22:09:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:41,730 INFO L470 AbstractCegarLoop]: Abstraction has 6388 states and 10164 transitions. [2021-11-02 22:09:41,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 10164 transitions. [2021-11-02 22:09:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:09:41,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:41,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:41,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:09:41,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2021-11-02 22:09:41,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:41,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384234274] [2021-11-02 22:09:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:41,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:41,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:41,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384234274] [2021-11-02 22:09:41,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384234274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:41,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:41,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353819287] [2021-11-02 22:09:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:41,832 INFO L87 Difference]: Start difference. First operand 6388 states and 10164 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:42,435 INFO L93 Difference]: Finished difference Result 20824 states and 33252 transitions. [2021-11-02 22:09:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-02 22:09:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:42,475 INFO L225 Difference]: With dead ends: 20824 [2021-11-02 22:09:42,475 INFO L226 Difference]: Without dead ends: 14515 [2021-11-02 22:09:42,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14515 states. [2021-11-02 22:09:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14515 to 10020. [2021-11-02 22:09:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10020 states, 10019 states have (on average 1.582593073160994) internal successors, (15856), 10019 states have internal predecessors, (15856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15856 transitions. [2021-11-02 22:09:43,043 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15856 transitions. Word has length 72 [2021-11-02 22:09:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:43,044 INFO L470 AbstractCegarLoop]: Abstraction has 10020 states and 15856 transitions. [2021-11-02 22:09:43,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15856 transitions. [2021-11-02 22:09:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:09:43,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:43,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:43,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:09:43,046 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2021-11-02 22:09:43,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:43,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542754498] [2021-11-02 22:09:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:43,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:43,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:43,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542754498] [2021-11-02 22:09:43,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542754498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:43,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:43,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:43,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864024570] [2021-11-02 22:09:43,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:43,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:43,153 INFO L87 Difference]: Start difference. First operand 10020 states and 15856 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:44,126 INFO L93 Difference]: Finished difference Result 29688 states and 46962 transitions. [2021-11-02 22:09:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-02 22:09:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:44,181 INFO L225 Difference]: With dead ends: 29688 [2021-11-02 22:09:44,181 INFO L226 Difference]: Without dead ends: 19677 [2021-11-02 22:09:44,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2021-11-02 22:09:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 19675. [2021-11-02 22:09:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19675 states, 19674 states have (on average 1.5702958218969199) internal successors, (30894), 19674 states have internal predecessors, (30894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19675 states to 19675 states and 30894 transitions. [2021-11-02 22:09:45,231 INFO L78 Accepts]: Start accepts. Automaton has 19675 states and 30894 transitions. Word has length 74 [2021-11-02 22:09:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:45,232 INFO L470 AbstractCegarLoop]: Abstraction has 19675 states and 30894 transitions. [2021-11-02 22:09:45,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19675 states and 30894 transitions. [2021-11-02 22:09:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:09:45,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:45,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:45,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:09:45,235 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2021-11-02 22:09:45,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:45,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786210196] [2021-11-02 22:09:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:45,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:45,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:45,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786210196] [2021-11-02 22:09:45,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786210196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:45,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:45,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:45,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756737812] [2021-11-02 22:09:45,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:45,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:45,274 INFO L87 Difference]: Start difference. First operand 19675 states and 30894 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:46,748 INFO L93 Difference]: Finished difference Result 58987 states and 92620 transitions. [2021-11-02 22:09:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:09:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:46,868 INFO L225 Difference]: With dead ends: 58987 [2021-11-02 22:09:46,868 INFO L226 Difference]: Without dead ends: 39340 [2021-11-02 22:09:46,907 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 [2021-11-02 22:09:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39340 states. [2021-11-02 22:09:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39340 to 19677. [2021-11-02 22:09:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19677 states, 19676 states have (on average 1.5702378532221997) internal successors, (30896), 19676 states have internal predecessors, (30896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 30896 transitions. [2021-11-02 22:09:48,154 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 30896 transitions. Word has length 75 [2021-11-02 22:09:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:48,155 INFO L470 AbstractCegarLoop]: Abstraction has 19677 states and 30896 transitions. [2021-11-02 22:09:48,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 30896 transitions. [2021-11-02 22:09:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:09:48,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:48,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:48,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:09:48,158 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2021-11-02 22:09:48,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:48,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657344875] [2021-11-02 22:09:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:48,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:48,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:48,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657344875] [2021-11-02 22:09:48,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657344875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:48,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:48,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:48,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597690411] [2021-11-02 22:09:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:48,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:48,325 INFO L87 Difference]: Start difference. First operand 19677 states and 30896 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:49,561 INFO L93 Difference]: Finished difference Result 58291 states and 91488 transitions. [2021-11-02 22:09:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:09:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:49,667 INFO L225 Difference]: With dead ends: 58291 [2021-11-02 22:09:49,667 INFO L226 Difference]: Without dead ends: 38626 [2021-11-02 22:09:49,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38626 states. [2021-11-02 22:09:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38626 to 38624. [2021-11-02 22:09:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38624 states, 38623 states have (on average 1.557543432669653) internal successors, (60157), 38623 states have internal predecessors, (60157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38624 states to 38624 states and 60157 transitions. [2021-11-02 22:09:51,263 INFO L78 Accepts]: Start accepts. Automaton has 38624 states and 60157 transitions. Word has length 76 [2021-11-02 22:09:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:51,264 INFO L470 AbstractCegarLoop]: Abstraction has 38624 states and 60157 transitions. [2021-11-02 22:09:51,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 38624 states and 60157 transitions. [2021-11-02 22:09:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:09:51,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:51,268 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:51,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:09:51,268 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2021-11-02 22:09:51,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:51,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677555766] [2021-11-02 22:09:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:51,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:51,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:51,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677555766] [2021-11-02 22:09:51,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677555766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:51,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:51,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:09:51,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985177974] [2021-11-02 22:09:51,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:51,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:09:51,372 INFO L87 Difference]: Start difference. First operand 38624 states and 60157 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:53,741 INFO L93 Difference]: Finished difference Result 114364 states and 178019 transitions. [2021-11-02 22:09:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:09:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:53,903 INFO L225 Difference]: With dead ends: 114364 [2021-11-02 22:09:53,903 INFO L226 Difference]: Without dead ends: 75786 [2021-11-02 22:09:53,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:09:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75786 states. [2021-11-02 22:09:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75786 to 75784. [2021-11-02 22:09:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75784 states, 75783 states have (on average 1.5442909359618913) internal successors, (117031), 75783 states have internal predecessors, (117031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75784 states to 75784 states and 117031 transitions. [2021-11-02 22:09:57,083 INFO L78 Accepts]: Start accepts. Automaton has 75784 states and 117031 transitions. Word has length 76 [2021-11-02 22:09:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:57,084 INFO L470 AbstractCegarLoop]: Abstraction has 75784 states and 117031 transitions. [2021-11-02 22:09:57,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 75784 states and 117031 transitions. [2021-11-02 22:09:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:09:57,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:57,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:57,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:09:57,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2021-11-02 22:09:57,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:57,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988493985] [2021-11-02 22:09:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:57,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:09:57,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:57,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988493985] [2021-11-02 22:09:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988493985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:57,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233042835] [2021-11-02 22:09:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:57,138 INFO L87 Difference]: Start difference. First operand 75784 states and 117031 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:02,118 INFO L93 Difference]: Finished difference Result 227228 states and 350901 transitions. [2021-11-02 22:10:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:10:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:02,418 INFO L225 Difference]: With dead ends: 227228 [2021-11-02 22:10:02,418 INFO L226 Difference]: Without dead ends: 151518 [2021-11-02 22:10:02,520 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 [2021-11-02 22:10:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151518 states. [2021-11-02 22:10:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151518 to 75792. [2021-11-02 22:10:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75792 states, 75791 states have (on average 1.5442334841867769) internal successors, (117039), 75791 states have internal predecessors, (117039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75792 states to 75792 states and 117039 transitions. [2021-11-02 22:10:06,345 INFO L78 Accepts]: Start accepts. Automaton has 75792 states and 117039 transitions. Word has length 77 [2021-11-02 22:10:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:06,345 INFO L470 AbstractCegarLoop]: Abstraction has 75792 states and 117039 transitions. [2021-11-02 22:10:06,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75792 states and 117039 transitions. [2021-11-02 22:10:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:10:06,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:06,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:06,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:10:06,350 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2021-11-02 22:10:06,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:06,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399222779] [2021-11-02 22:10:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:06,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:10:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:06,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399222779] [2021-11-02 22:10:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399222779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:06,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:06,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:06,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451247949] [2021-11-02 22:10:06,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:06,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:06,475 INFO L87 Difference]: Start difference. First operand 75792 states and 117039 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:12,228 INFO L93 Difference]: Finished difference Result 224404 states and 346298 transitions. [2021-11-02 22:10:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:10:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:10:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:12,494 INFO L225 Difference]: With dead ends: 224404 [2021-11-02 22:10:12,494 INFO L226 Difference]: Without dead ends: 148667 [2021-11-02 22:10:12,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:10:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148667 states. [2021-11-02 22:10:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148667 to 148665. [2021-11-02 22:10:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148665 states, 148664 states have (on average 1.5305722972609375) internal successors, (227541), 148664 states have internal predecessors, (227541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148665 states to 148665 states and 227541 transitions. [2021-11-02 22:10:19,509 INFO L78 Accepts]: Start accepts. Automaton has 148665 states and 227541 transitions. Word has length 78 [2021-11-02 22:10:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:19,509 INFO L470 AbstractCegarLoop]: Abstraction has 148665 states and 227541 transitions. [2021-11-02 22:10:19,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 148665 states and 227541 transitions. [2021-11-02 22:10:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:10:19,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:19,514 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:19,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:10:19,515 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2021-11-02 22:10:19,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:19,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106965825] [2021-11-02 22:10:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:19,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:10:19,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:19,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106965825] [2021-11-02 22:10:19,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106965825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:19,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:19,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:19,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450566313] [2021-11-02 22:10:19,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:19,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:19,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:19,598 INFO L87 Difference]: Start difference. First operand 148665 states and 227541 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)