./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label34.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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/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 c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:28:30,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:28:30,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:28:30,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:28:30,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:28:30,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:28:30,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:28:30,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:28:30,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:28:30,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:28:30,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:28:30,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:28:30,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:28:30,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:28:30,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:28:30,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:28:30,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:28:30,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:28:30,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:28:30,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:28:30,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:28:30,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:28:30,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:28:30,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:28:30,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:28:30,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:28:30,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:28:30,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:28:30,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:28:30,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:28:30,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:28:30,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:28:30,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:28:30,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:28:30,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:28:30,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:28:30,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:28:30,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:28:30,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:28:30,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:28:30,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:28:30,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:28:30,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:28:30,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:28:30,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:28:30,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:28:30,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:28:30,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:28:30,573 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:28:30,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:28:30,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:28:30,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:28:30,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:28:30,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:28:30,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:28:30,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:28:30,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:28:30,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:28:30,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:28:30,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:28:30,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:28:30,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:28:30,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:28:30,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:28:30,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:30,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:28:30,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:28:30,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:28:30,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:28:30,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:28:30,578 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:28:30,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:28:30,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:28:30,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:28:30,578 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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c371ce1f15a8888766c33a9703b06847f70d6274570c9b062f0d05b5c6caa625 [2021-11-02 22:28:30,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:28:30,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:28:30,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:28:30,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:28:30,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:28:30,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-02 22:28:30,992 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/data/95944383d/ce017307713b40d688250851550bbe52/FLAG7ead6e456 [2021-11-02 22:28:31,790 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:28:31,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/sv-benchmarks/c/eca-rers2012/Problem17_label34.c [2021-11-02 22:28:31,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/data/95944383d/ce017307713b40d688250851550bbe52/FLAG7ead6e456 [2021-11-02 22:28:31,906 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/data/95944383d/ce017307713b40d688250851550bbe52 [2021-11-02 22:28:31,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:28:31,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:28:31,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:31,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:28:31,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:28:31,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:31" (1/1) ... [2021-11-02 22:28:31,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b06158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:31, skipping insertion in model container [2021-11-02 22:28:31,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:28:31" (1/1) ... [2021-11-02 22:28:31,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:28:32,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:28:32,327 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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-02 22:28:33,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:33,265 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:28:33,303 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_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/sv-benchmarks/c/eca-rers2012/Problem17_label34.c[2983,2996] [2021-11-02 22:28:34,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:28:34,082 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:28:34,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34 WrapperNode [2021-11-02 22:28:34,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:28:34,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:28:34,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:28:34,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:28:34,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:28:34,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:28:34,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:28:34,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:28:34,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:34,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:35,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:35,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:28:35,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:28:35,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:28:35,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:28:35,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (1/1) ... [2021-11-02 22:28:35,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:28:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:35,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:28:35,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:28:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:28:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:28:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:28:35,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:28:40,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:28:40,740 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 22:28:40,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:40 BoogieIcfgContainer [2021-11-02 22:28:40,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:28:40,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:28:40,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:28:40,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:28:40,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:28:31" (1/3) ... [2021-11-02 22:28:40,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399dc9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:40, skipping insertion in model container [2021-11-02 22:28:40,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:28:34" (2/3) ... [2021-11-02 22:28:40,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399dc9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:28:40, skipping insertion in model container [2021-11-02 22:28:40,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:28:40" (3/3) ... [2021-11-02 22:28:40,764 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label34.c [2021-11-02 22:28:40,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:28:40,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:28:40,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:28:40,869 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 22:28:40,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:28:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 22:28:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:28:40,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:40,918 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:40,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash 406614337, now seen corresponding path program 1 times [2021-11-02 22:28:40,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:40,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127666176] [2021-11-02 22:28:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:40,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:41,205 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 22:28:41,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:41,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127666176] [2021-11-02 22:28:41,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127666176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:41,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:41,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:28:41,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50864711] [2021-11-02 22:28:41,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:41,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:41,252 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 22:28:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:45,258 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-02 22:28:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-02 22:28:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:45,286 INFO L225 Difference]: With dead ends: 1642 [2021-11-02 22:28:45,286 INFO L226 Difference]: Without dead ends: 975 [2021-11-02 22:28:45,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-02 22:28:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-02 22:28:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 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 22:28:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-02 22:28:45,452 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 19 [2021-11-02 22:28:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-02 22:28:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 22:28:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-02 22:28:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:28:45,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:45,457 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:45,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:28:45,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 952084788, now seen corresponding path program 1 times [2021-11-02 22:28:45,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:45,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390106793] [2021-11-02 22:28:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:45,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:45,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:45,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390106793] [2021-11-02 22:28:45,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390106793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:45,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:45,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:28:45,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514134940] [2021-11-02 22:28:45,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:45,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:45,763 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 22:28:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:51,680 INFO L93 Difference]: Finished difference Result 3735 states and 5654 transitions. [2021-11-02 22:28:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:28:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-02 22:28:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:51,712 INFO L225 Difference]: With dead ends: 3735 [2021-11-02 22:28:51,712 INFO L226 Difference]: Without dead ends: 2765 [2021-11-02 22:28:51,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-11-02 22:28:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2724. [2021-11-02 22:28:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.3944179214102093) internal successors, (3797), 2723 states have internal predecessors, (3797), 0 states have call successors, (0), 0 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 22:28:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3797 transitions. [2021-11-02 22:28:51,809 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3797 transitions. Word has length 89 [2021-11-02 22:28:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3797 transitions. [2021-11-02 22:28:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 22:28:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3797 transitions. [2021-11-02 22:28:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 22:28:51,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:51,818 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:51,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:28:51,825 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1747470320, now seen corresponding path program 1 times [2021-11-02 22:28:51,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:51,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521848462] [2021-11-02 22:28:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:52,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:52,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521848462] [2021-11-02 22:28:52,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521848462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:52,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:52,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:28:52,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452445223] [2021-11-02 22:28:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:52,136 INFO L87 Difference]: Start difference. First operand 2724 states and 3797 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 22:28:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:56,412 INFO L93 Difference]: Finished difference Result 6325 states and 8834 transitions. [2021-11-02 22:28:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-02 22:28:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:56,443 INFO L225 Difference]: With dead ends: 6325 [2021-11-02 22:28:56,443 INFO L226 Difference]: Without dead ends: 3603 [2021-11-02 22:28:56,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-11-02 22:28:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3583. [2021-11-02 22:28:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3604131769960917) internal successors, (4873), 3582 states have internal predecessors, (4873), 0 states have call successors, (0), 0 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 22:28:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4873 transitions. [2021-11-02 22:28:56,580 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4873 transitions. Word has length 124 [2021-11-02 22:28:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:56,582 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4873 transitions. [2021-11-02 22:28:56,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 22:28:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4873 transitions. [2021-11-02 22:28:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 22:28:56,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:56,593 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:56,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:28:56,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2113039039, now seen corresponding path program 1 times [2021-11-02 22:28:56,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:56,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078222175] [2021-11-02 22:28:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:56,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:56,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:56,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078222175] [2021-11-02 22:28:56,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078222175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:56,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:56,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:28:56,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896302047] [2021-11-02 22:28:56,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:28:56,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:28:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:28:56,963 INFO L87 Difference]: Start difference. First operand 3583 states and 4873 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 22:29:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:00,190 INFO L93 Difference]: Finished difference Result 6753 states and 9152 transitions. [2021-11-02 22:29:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:29:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-02 22:29:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:00,220 INFO L225 Difference]: With dead ends: 6753 [2021-11-02 22:29:00,221 INFO L226 Difference]: Without dead ends: 3172 [2021-11-02 22:29:00,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:29:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-11-02 22:29:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3149. [2021-11-02 22:29:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 1.3430749682337992) internal successors, (4228), 3148 states have internal predecessors, (4228), 0 states have call successors, (0), 0 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 22:29:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4228 transitions. [2021-11-02 22:29:00,314 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4228 transitions. Word has length 130 [2021-11-02 22:29:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 4228 transitions. [2021-11-02 22:29:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 22:29:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4228 transitions. [2021-11-02 22:29:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 22:29:00,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:00,319 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:00,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:29:00,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 884332769, now seen corresponding path program 1 times [2021-11-02 22:29:00,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:00,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705948735] [2021-11-02 22:29:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:00,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-02 22:29:00,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:00,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705948735] [2021-11-02 22:29:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705948735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:00,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:29:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626080421] [2021-11-02 22:29:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:00,434 INFO L87 Difference]: Start difference. First operand 3149 states and 4228 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 22:29:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:03,165 INFO L93 Difference]: Finished difference Result 8434 states and 11589 transitions. [2021-11-02 22:29:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 160 [2021-11-02 22:29:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:03,196 INFO L225 Difference]: With dead ends: 8434 [2021-11-02 22:29:03,197 INFO L226 Difference]: Without dead ends: 4853 [2021-11-02 22:29:03,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2021-11-02 22:29:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4001. [2021-11-02 22:29:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 1.22775) internal successors, (4911), 4000 states have internal predecessors, (4911), 0 states have call successors, (0), 0 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 22:29:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4911 transitions. [2021-11-02 22:29:03,329 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4911 transitions. Word has length 160 [2021-11-02 22:29:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:03,330 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 4911 transitions. [2021-11-02 22:29:03,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 22:29:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4911 transitions. [2021-11-02 22:29:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 22:29:03,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:03,334 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:03,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:29:03,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1935512509, now seen corresponding path program 1 times [2021-11-02 22:29:03,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:03,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480453785] [2021-11-02 22:29:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:03,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:29:03,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:03,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480453785] [2021-11-02 22:29:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480453785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:03,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:03,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:03,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124660555] [2021-11-02 22:29:03,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:03,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:03,501 INFO L87 Difference]: Start difference. First operand 4001 states and 4911 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:06,178 INFO L93 Difference]: Finished difference Result 10125 states and 12629 transitions. [2021-11-02 22:29:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-02 22:29:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:06,209 INFO L225 Difference]: With dead ends: 10125 [2021-11-02 22:29:06,210 INFO L226 Difference]: Without dead ends: 6126 [2021-11-02 22:29:06,215 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 22:29:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-11-02 22:29:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3978. [2021-11-02 22:29:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.2260497862710587) internal successors, (4876), 3977 states have internal predecessors, (4876), 0 states have call successors, (0), 0 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 22:29:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4876 transitions. [2021-11-02 22:29:06,324 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4876 transitions. Word has length 173 [2021-11-02 22:29:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:06,325 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 4876 transitions. [2021-11-02 22:29:06,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4876 transitions. [2021-11-02 22:29:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-02 22:29:06,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:06,329 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:06,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:29:06,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:06,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:06,331 INFO L85 PathProgramCache]: Analyzing trace with hash -330707048, now seen corresponding path program 1 times [2021-11-02 22:29:06,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:06,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944812643] [2021-11-02 22:29:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:06,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:06,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:06,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944812643] [2021-11-02 22:29:06,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944812643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:06,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:06,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:06,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659785462] [2021-11-02 22:29:06,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:06,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:06,427 INFO L87 Difference]: Start difference. First operand 3978 states and 4876 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 22:29:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:08,783 INFO L93 Difference]: Finished difference Result 10511 states and 13139 transitions. [2021-11-02 22:29:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-11-02 22:29:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:08,830 INFO L225 Difference]: With dead ends: 10511 [2021-11-02 22:29:08,831 INFO L226 Difference]: Without dead ends: 6535 [2021-11-02 22:29:08,836 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 22:29:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-11-02 22:29:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6535. [2021-11-02 22:29:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6535 states, 6534 states have (on average 1.2058463422099786) internal successors, (7879), 6534 states have internal predecessors, (7879), 0 states have call successors, (0), 0 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 22:29:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 7879 transitions. [2021-11-02 22:29:08,988 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 7879 transitions. Word has length 180 [2021-11-02 22:29:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:08,989 INFO L470 AbstractCegarLoop]: Abstraction has 6535 states and 7879 transitions. [2021-11-02 22:29:08,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 22:29:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 7879 transitions. [2021-11-02 22:29:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-02 22:29:08,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:08,996 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:08,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:29:08,996 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 75287222, now seen corresponding path program 1 times [2021-11-02 22:29:08,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:08,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069094317] [2021-11-02 22:29:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:09,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 172 proven. 70 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:29:09,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:09,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069094317] [2021-11-02 22:29:09,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069094317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:09,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158501662] [2021-11-02 22:29:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:09,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:09,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:09,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:29:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:29:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 172 proven. 70 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:29:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158501662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:10,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-02 22:29:10,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488468241] [2021-11-02 22:29:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:29:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:29:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:29:10,915 INFO L87 Difference]: Start difference. First operand 6535 states and 7879 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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 22:29:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:14,767 INFO L93 Difference]: Finished difference Result 16907 states and 20637 transitions. [2021-11-02 22:29:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:29:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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) Word has length 243 [2021-11-02 22:29:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:14,799 INFO L225 Difference]: With dead ends: 16907 [2021-11-02 22:29:14,799 INFO L226 Difference]: Without dead ends: 9524 [2021-11-02 22:29:14,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:29:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-11-02 22:29:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9522. [2021-11-02 22:29:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 1.164058397227182) internal successors, (11083), 9521 states have internal predecessors, (11083), 0 states have call successors, (0), 0 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 22:29:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 11083 transitions. [2021-11-02 22:29:15,100 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 11083 transitions. Word has length 243 [2021-11-02 22:29:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:15,101 INFO L470 AbstractCegarLoop]: Abstraction has 9522 states and 11083 transitions. [2021-11-02 22:29:15,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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 22:29:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 11083 transitions. [2021-11-02 22:29:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-02 22:29:15,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:15,109 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:15,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:15,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:15,334 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:15,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1746214153, now seen corresponding path program 1 times [2021-11-02 22:29:15,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:15,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825366399] [2021-11-02 22:29:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:15,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:29:15,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:15,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825366399] [2021-11-02 22:29:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825366399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:15,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:15,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:15,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985487577] [2021-11-02 22:29:15,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:15,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:15,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:15,528 INFO L87 Difference]: Start difference. First operand 9522 states and 11083 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:18,750 INFO L93 Difference]: Finished difference Result 24594 states and 28966 transitions. [2021-11-02 22:29:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 279 [2021-11-02 22:29:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:18,778 INFO L225 Difference]: With dead ends: 24594 [2021-11-02 22:29:18,778 INFO L226 Difference]: Without dead ends: 14648 [2021-11-02 22:29:18,789 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 22:29:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14648 states. [2021-11-02 22:29:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14648 to 9522. [2021-11-02 22:29:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 1.1609074677029725) internal successors, (11053), 9521 states have internal predecessors, (11053), 0 states have call successors, (0), 0 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 22:29:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 11053 transitions. [2021-11-02 22:29:18,963 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 11053 transitions. Word has length 279 [2021-11-02 22:29:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:18,964 INFO L470 AbstractCegarLoop]: Abstraction has 9522 states and 11053 transitions. [2021-11-02 22:29:18,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 11053 transitions. [2021-11-02 22:29:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-02 22:29:18,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:18,970 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:18,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:29:18,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash 499316572, now seen corresponding path program 1 times [2021-11-02 22:29:18,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:18,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892603003] [2021-11-02 22:29:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:18,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 22:29:19,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:19,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892603003] [2021-11-02 22:29:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892603003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:19,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:19,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:19,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513851357] [2021-11-02 22:29:19,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:19,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:19,129 INFO L87 Difference]: Start difference. First operand 9522 states and 11053 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:21,837 INFO L93 Difference]: Finished difference Result 25846 states and 30175 transitions. [2021-11-02 22:29:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 291 [2021-11-02 22:29:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:21,884 INFO L225 Difference]: With dead ends: 25846 [2021-11-02 22:29:21,884 INFO L226 Difference]: Without dead ends: 16751 [2021-11-02 22:29:21,896 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 22:29:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16751 states. [2021-11-02 22:29:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16751 to 15470. [2021-11-02 22:29:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15470 states, 15469 states have (on average 1.1405391428017324) internal successors, (17643), 15469 states have internal predecessors, (17643), 0 states have call successors, (0), 0 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 22:29:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15470 states to 15470 states and 17643 transitions. [2021-11-02 22:29:22,174 INFO L78 Accepts]: Start accepts. Automaton has 15470 states and 17643 transitions. Word has length 291 [2021-11-02 22:29:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:22,175 INFO L470 AbstractCegarLoop]: Abstraction has 15470 states and 17643 transitions. [2021-11-02 22:29:22,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 15470 states and 17643 transitions. [2021-11-02 22:29:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-02 22:29:22,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:22,183 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:22,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:29:22,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -42575517, now seen corresponding path program 1 times [2021-11-02 22:29:22,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:22,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132552453] [2021-11-02 22:29:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:22,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-02 22:29:22,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:22,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132552453] [2021-11-02 22:29:22,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132552453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:22,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:22,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:22,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442545306] [2021-11-02 22:29:22,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:22,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:22,354 INFO L87 Difference]: Start difference. First operand 15470 states and 17643 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:24,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:24,931 INFO L93 Difference]: Finished difference Result 36039 states and 41656 transitions. [2021-11-02 22:29:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 306 [2021-11-02 22:29:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:24,956 INFO L225 Difference]: With dead ends: 36039 [2021-11-02 22:29:24,956 INFO L226 Difference]: Without dead ends: 19721 [2021-11-02 22:29:24,972 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 22:29:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19721 states. [2021-11-02 22:29:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19721 to 15888. [2021-11-02 22:29:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 1.1303581544659156) internal successors, (17958), 15887 states have internal predecessors, (17958), 0 states have call successors, (0), 0 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 22:29:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 17958 transitions. [2021-11-02 22:29:25,420 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 17958 transitions. Word has length 306 [2021-11-02 22:29:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 15888 states and 17958 transitions. [2021-11-02 22:29:25,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 22:29:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 17958 transitions. [2021-11-02 22:29:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-02 22:29:25,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:25,433 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:25,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:29:25,434 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -311441690, now seen corresponding path program 1 times [2021-11-02 22:29:25,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:25,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068768733] [2021-11-02 22:29:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 22:29:25,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:25,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068768733] [2021-11-02 22:29:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068768733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:25,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:25,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:25,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508726627] [2021-11-02 22:29:25,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:25,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:25,631 INFO L87 Difference]: Start difference. First operand 15888 states and 17958 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 22:29:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:28,884 INFO L93 Difference]: Finished difference Result 40756 states and 46103 transitions. [2021-11-02 22:29:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 340 [2021-11-02 22:29:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:28,925 INFO L225 Difference]: With dead ends: 40756 [2021-11-02 22:29:28,925 INFO L226 Difference]: Without dead ends: 25295 [2021-11-02 22:29:28,941 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 22:29:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2021-11-02 22:29:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 24841. [2021-11-02 22:29:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24841 states, 24840 states have (on average 1.1269323671497584) internal successors, (27993), 24840 states have internal predecessors, (27993), 0 states have call successors, (0), 0 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 22:29:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24841 states to 24841 states and 27993 transitions. [2021-11-02 22:29:29,334 INFO L78 Accepts]: Start accepts. Automaton has 24841 states and 27993 transitions. Word has length 340 [2021-11-02 22:29:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:29,335 INFO L470 AbstractCegarLoop]: Abstraction has 24841 states and 27993 transitions. [2021-11-02 22:29:29,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 22:29:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 24841 states and 27993 transitions. [2021-11-02 22:29:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-02 22:29:29,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:29,346 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:29,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:29:29,347 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1834270194, now seen corresponding path program 1 times [2021-11-02 22:29:29,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:29,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273690217] [2021-11-02 22:29:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:29,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-02 22:29:29,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:29,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273690217] [2021-11-02 22:29:29,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273690217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:29,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:29,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:29,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443565730] [2021-11-02 22:29:29,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:29,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:29,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:29,516 INFO L87 Difference]: Start difference. First operand 24841 states and 27993 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 22:29:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:32,207 INFO L93 Difference]: Finished difference Result 59068 states and 66804 transitions. [2021-11-02 22:29:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 346 [2021-11-02 22:29:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:32,241 INFO L225 Difference]: With dead ends: 59068 [2021-11-02 22:29:32,241 INFO L226 Difference]: Without dead ends: 32952 [2021-11-02 22:29:32,258 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 22:29:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32952 states. [2021-11-02 22:29:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32952 to 32942. [2021-11-02 22:29:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32942 states, 32941 states have (on average 1.1084362951944386) internal successors, (36513), 32941 states have internal predecessors, (36513), 0 states have call successors, (0), 0 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 22:29:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32942 states to 32942 states and 36513 transitions. [2021-11-02 22:29:32,799 INFO L78 Accepts]: Start accepts. Automaton has 32942 states and 36513 transitions. Word has length 346 [2021-11-02 22:29:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:32,800 INFO L470 AbstractCegarLoop]: Abstraction has 32942 states and 36513 transitions. [2021-11-02 22:29:32,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 22:29:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 32942 states and 36513 transitions. [2021-11-02 22:29:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-02 22:29:32,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:32,809 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:32,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:29:32,809 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2138010711, now seen corresponding path program 1 times [2021-11-02 22:29:32,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:32,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786045647] [2021-11-02 22:29:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:32,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-02 22:29:33,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:33,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786045647] [2021-11-02 22:29:33,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786045647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:33,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:33,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:33,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021736622] [2021-11-02 22:29:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:33,027 INFO L87 Difference]: Start difference. First operand 32942 states and 36513 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 22:29:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:36,531 INFO L93 Difference]: Finished difference Result 76558 states and 85463 transitions. [2021-11-02 22:29:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:36,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 348 [2021-11-02 22:29:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:36,581 INFO L225 Difference]: With dead ends: 76558 [2021-11-02 22:29:36,582 INFO L226 Difference]: Without dead ends: 42330 [2021-11-02 22:29:36,603 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 22:29:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42330 states. [2021-11-02 22:29:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42330 to 41042. [2021-11-02 22:29:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41042 states, 41041 states have (on average 1.1101825004264028) internal successors, (45563), 41041 states have internal predecessors, (45563), 0 states have call successors, (0), 0 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 22:29:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41042 states to 41042 states and 45563 transitions. [2021-11-02 22:29:37,183 INFO L78 Accepts]: Start accepts. Automaton has 41042 states and 45563 transitions. Word has length 348 [2021-11-02 22:29:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:37,185 INFO L470 AbstractCegarLoop]: Abstraction has 41042 states and 45563 transitions. [2021-11-02 22:29:37,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 22:29:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41042 states and 45563 transitions. [2021-11-02 22:29:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-02 22:29:37,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:37,200 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:37,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:29:37,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -746441012, now seen corresponding path program 1 times [2021-11-02 22:29:37,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:37,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25812948] [2021-11-02 22:29:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:37,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 618 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-02 22:29:37,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25812948] [2021-11-02 22:29:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25812948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:37,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:37,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:37,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515582517] [2021-11-02 22:29:37,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:37,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:37,444 INFO L87 Difference]: Start difference. First operand 41042 states and 45563 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 22:29:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:40,679 INFO L93 Difference]: Finished difference Result 90210 states and 100567 transitions. [2021-11-02 22:29:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 422 [2021-11-02 22:29:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:40,739 INFO L225 Difference]: With dead ends: 90210 [2021-11-02 22:29:40,739 INFO L226 Difference]: Without dead ends: 49595 [2021-11-02 22:29:40,759 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 22:29:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49595 states. [2021-11-02 22:29:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49595 to 47863. [2021-11-02 22:29:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47863 states, 47862 states have (on average 1.1180686139317204) internal successors, (53513), 47862 states have internal predecessors, (53513), 0 states have call successors, (0), 0 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 22:29:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47863 states to 47863 states and 53513 transitions. [2021-11-02 22:29:41,326 INFO L78 Accepts]: Start accepts. Automaton has 47863 states and 53513 transitions. Word has length 422 [2021-11-02 22:29:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:41,326 INFO L470 AbstractCegarLoop]: Abstraction has 47863 states and 53513 transitions. [2021-11-02 22:29:41,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 22:29:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47863 states and 53513 transitions. [2021-11-02 22:29:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-02 22:29:41,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:41,342 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:41,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:29:41,342 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2087130249, now seen corresponding path program 1 times [2021-11-02 22:29:41,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:41,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158457197] [2021-11-02 22:29:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:41,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 505 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-02 22:29:41,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158457197] [2021-11-02 22:29:41,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158457197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:41,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:41,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:29:41,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078475267] [2021-11-02 22:29:41,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:29:41,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:29:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:29:41,688 INFO L87 Difference]: Start difference. First operand 47863 states and 53513 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 22:29:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:45,881 INFO L93 Difference]: Finished difference Result 122581 states and 136920 transitions. [2021-11-02 22:29:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:29:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 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 423 [2021-11-02 22:29:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:45,965 INFO L225 Difference]: With dead ends: 122581 [2021-11-02 22:29:45,965 INFO L226 Difference]: Without dead ends: 74295 [2021-11-02 22:29:45,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:29:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74295 states. [2021-11-02 22:29:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74295 to 64079. [2021-11-02 22:29:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64079 states, 64078 states have (on average 1.1203845313524143) internal successors, (71792), 64078 states have internal predecessors, (71792), 0 states have call successors, (0), 0 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 22:29:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64079 states to 64079 states and 71792 transitions. [2021-11-02 22:29:47,029 INFO L78 Accepts]: Start accepts. Automaton has 64079 states and 71792 transitions. Word has length 423 [2021-11-02 22:29:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:47,030 INFO L470 AbstractCegarLoop]: Abstraction has 64079 states and 71792 transitions. [2021-11-02 22:29:47,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 22:29:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 64079 states and 71792 transitions. [2021-11-02 22:29:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-02 22:29:47,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:47,047 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:29:47,048 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2119162510, now seen corresponding path program 1 times [2021-11-02 22:29:47,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:47,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260713244] [2021-11-02 22:29:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:47,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-02 22:29:47,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:47,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260713244] [2021-11-02 22:29:47,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260713244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:47,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:47,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:47,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951461911] [2021-11-02 22:29:47,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:47,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:47,621 INFO L87 Difference]: Start difference. First operand 64079 states and 71792 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 22:29:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:50,729 INFO L93 Difference]: Finished difference Result 139236 states and 155991 transitions. [2021-11-02 22:29:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 443 [2021-11-02 22:29:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:50,822 INFO L225 Difference]: With dead ends: 139236 [2021-11-02 22:29:50,822 INFO L226 Difference]: Without dead ends: 75158 [2021-11-02 22:29:50,843 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 22:29:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75158 states. [2021-11-02 22:29:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75158 to 58093. [2021-11-02 22:29:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58093 states, 58092 states have (on average 1.1209632995937477) internal successors, (65119), 58092 states have internal predecessors, (65119), 0 states have call successors, (0), 0 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 22:29:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58093 states to 58093 states and 65119 transitions. [2021-11-02 22:29:51,836 INFO L78 Accepts]: Start accepts. Automaton has 58093 states and 65119 transitions. Word has length 443 [2021-11-02 22:29:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:51,837 INFO L470 AbstractCegarLoop]: Abstraction has 58093 states and 65119 transitions. [2021-11-02 22:29:51,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 22:29:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 58093 states and 65119 transitions. [2021-11-02 22:29:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-02 22:29:51,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:51,861 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:51,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:29:51,861 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash -63934917, now seen corresponding path program 1 times [2021-11-02 22:29:51,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:51,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213738678] [2021-11-02 22:29:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:51,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 22:29:52,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:52,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213738678] [2021-11-02 22:29:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213738678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:52,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:52,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:29:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132548576] [2021-11-02 22:29:52,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:29:52,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:29:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:29:52,366 INFO L87 Difference]: Start difference. First operand 58093 states and 65119 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 22:29:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:55,977 INFO L93 Difference]: Finished difference Result 130666 states and 146498 transitions. [2021-11-02 22:29:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:29:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 454 [2021-11-02 22:29:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:56,085 INFO L225 Difference]: With dead ends: 130666 [2021-11-02 22:29:56,085 INFO L226 Difference]: Without dead ends: 72570 [2021-11-02 22:29:56,275 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 22:29:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72570 states. [2021-11-02 22:29:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72570 to 69994. [2021-11-02 22:29:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69994 states, 69993 states have (on average 1.11988341691312) internal successors, (78384), 69993 states have internal predecessors, (78384), 0 states have call successors, (0), 0 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 22:29:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69994 states to 69994 states and 78384 transitions. [2021-11-02 22:29:57,530 INFO L78 Accepts]: Start accepts. Automaton has 69994 states and 78384 transitions. Word has length 454 [2021-11-02 22:29:57,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:57,531 INFO L470 AbstractCegarLoop]: Abstraction has 69994 states and 78384 transitions. [2021-11-02 22:29:57,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 22:29:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 69994 states and 78384 transitions. [2021-11-02 22:29:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-02 22:29:57,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:57,547 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:57,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:29:57,548 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:29:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1567427203, now seen corresponding path program 1 times [2021-11-02 22:29:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:57,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775512722] [2021-11-02 22:29:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:57,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:57,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:57,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775512722] [2021-11-02 22:29:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775512722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:29:57,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:29:57,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:29:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814464481] [2021-11-02 22:29:57,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:29:57,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:29:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:29:57,851 INFO L87 Difference]: Start difference. First operand 69994 states and 78384 transitions. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 22:30:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:02,722 INFO L93 Difference]: Finished difference Result 165976 states and 186011 transitions. [2021-11-02 22:30:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 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 475 [2021-11-02 22:30:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:02,845 INFO L225 Difference]: With dead ends: 165976 [2021-11-02 22:30:02,845 INFO L226 Difference]: Without dead ends: 96409 [2021-11-02 22:30:02,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96409 states. [2021-11-02 22:30:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96409 to 90871. [2021-11-02 22:30:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90871 states, 90870 states have (on average 1.1212171233630461) internal successors, (101885), 90870 states have internal predecessors, (101885), 0 states have call successors, (0), 0 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 22:30:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90871 states to 90871 states and 101885 transitions. [2021-11-02 22:30:04,233 INFO L78 Accepts]: Start accepts. Automaton has 90871 states and 101885 transitions. Word has length 475 [2021-11-02 22:30:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:04,234 INFO L470 AbstractCegarLoop]: Abstraction has 90871 states and 101885 transitions. [2021-11-02 22:30:04,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 22:30:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 90871 states and 101885 transitions. [2021-11-02 22:30:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-02 22:30:04,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:04,248 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:04,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:30:04,248 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash 608661994, now seen corresponding path program 1 times [2021-11-02 22:30:04,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:04,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979821154] [2021-11-02 22:30:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:04,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-02 22:30:04,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:04,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979821154] [2021-11-02 22:30:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979821154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:04,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:04,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:30:04,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557672076] [2021-11-02 22:30:04,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:30:04,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:30:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:04,814 INFO L87 Difference]: Start difference. First operand 90871 states and 101885 transitions. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 22:30:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:08,314 INFO L93 Difference]: Finished difference Result 199185 states and 223422 transitions. [2021-11-02 22:30:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:30:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 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 505 [2021-11-02 22:30:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:08,450 INFO L225 Difference]: With dead ends: 199185 [2021-11-02 22:30:08,450 INFO L226 Difference]: Without dead ends: 105762 [2021-11-02 22:30:08,477 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 22:30:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105762 states. [2021-11-02 22:30:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105762 to 91692. [2021-11-02 22:30:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91692 states, 91691 states have (on average 1.1153330206890535) internal successors, (102266), 91691 states have internal predecessors, (102266), 0 states have call successors, (0), 0 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 22:30:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91692 states to 91692 states and 102266 transitions. [2021-11-02 22:30:10,179 INFO L78 Accepts]: Start accepts. Automaton has 91692 states and 102266 transitions. Word has length 505 [2021-11-02 22:30:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 91692 states and 102266 transitions. [2021-11-02 22:30:10,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 22:30:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 91692 states and 102266 transitions. [2021-11-02 22:30:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-11-02 22:30:10,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:10,201 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:10,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:30:10,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1379758595, now seen corresponding path program 1 times [2021-11-02 22:30:10,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:10,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380022762] [2021-11-02 22:30:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:10,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 263 proven. 82 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:30:10,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:10,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380022762] [2021-11-02 22:30:10,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380022762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:10,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618335498] [2021-11-02 22:30:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:10,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:10,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:10,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:30:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:30:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 263 proven. 82 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:30:13,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618335498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:13,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:13,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-02 22:30:13,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796803170] [2021-11-02 22:30:13,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:30:13,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:13,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:30:13,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:30:13,585 INFO L87 Difference]: Start difference. First operand 91692 states and 102266 transitions. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 22:30:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:18,614 INFO L93 Difference]: Finished difference Result 185938 states and 207231 transitions. [2021-11-02 22:30:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:30:18,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 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 518 [2021-11-02 22:30:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:18,742 INFO L225 Difference]: With dead ends: 185938 [2021-11-02 22:30:18,742 INFO L226 Difference]: Without dead ends: 94673 [2021-11-02 22:30:18,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:30:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94673 states. [2021-11-02 22:30:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94673 to 94242. [2021-11-02 22:30:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94242 states, 94241 states have (on average 1.1127110281087849) internal successors, (104863), 94241 states have internal predecessors, (104863), 0 states have call successors, (0), 0 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 22:30:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94242 states to 94242 states and 104863 transitions. [2021-11-02 22:30:20,614 INFO L78 Accepts]: Start accepts. Automaton has 94242 states and 104863 transitions. Word has length 518 [2021-11-02 22:30:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:20,614 INFO L470 AbstractCegarLoop]: Abstraction has 94242 states and 104863 transitions. [2021-11-02 22:30:20,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 22:30:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 94242 states and 104863 transitions. [2021-11-02 22:30:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-11-02 22:30:20,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:20,626 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:20,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:20,827 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1004549033, now seen corresponding path program 1 times [2021-11-02 22:30:20,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:20,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078210727] [2021-11-02 22:30:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:20,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 22:30:21,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:21,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078210727] [2021-11-02 22:30:21,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078210727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:21,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:21,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:30:21,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829909325] [2021-11-02 22:30:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:30:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:21,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:30:21,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:21,039 INFO L87 Difference]: Start difference. First operand 94242 states and 104863 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 22:30:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:24,062 INFO L93 Difference]: Finished difference Result 186342 states and 207423 transitions. [2021-11-02 22:30:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:30:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 523 [2021-11-02 22:30:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:24,218 INFO L225 Difference]: With dead ends: 186342 [2021-11-02 22:30:24,219 INFO L226 Difference]: Without dead ends: 92525 [2021-11-02 22:30:24,263 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 22:30:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92525 states. [2021-11-02 22:30:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92525 to 91665. [2021-11-02 22:30:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91665 states, 91664 states have (on average 1.091966311747251) internal successors, (100094), 91664 states have internal predecessors, (100094), 0 states have call successors, (0), 0 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 22:30:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91665 states to 91665 states and 100094 transitions. [2021-11-02 22:30:25,901 INFO L78 Accepts]: Start accepts. Automaton has 91665 states and 100094 transitions. Word has length 523 [2021-11-02 22:30:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:25,902 INFO L470 AbstractCegarLoop]: Abstraction has 91665 states and 100094 transitions. [2021-11-02 22:30:25,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 22:30:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 91665 states and 100094 transitions. [2021-11-02 22:30:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-11-02 22:30:25,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:25,923 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:25,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:30:25,924 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -432839663, now seen corresponding path program 1 times [2021-11-02 22:30:25,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:25,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700898972] [2021-11-02 22:30:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:25,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 426 proven. 17 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-02 22:30:26,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:26,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700898972] [2021-11-02 22:30:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700898972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:26,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845184723] [2021-11-02 22:30:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:26,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:26,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:30:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:30:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 491 proven. 82 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-02 22:30:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845184723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:29,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:29,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-11-02 22:30:29,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760733099] [2021-11-02 22:30:29,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:30:29,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:30:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:29,434 INFO L87 Difference]: Start difference. First operand 91665 states and 100094 transitions. Second operand has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 0 states have call successors, (0), 0 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 22:30:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:38,024 INFO L93 Difference]: Finished difference Result 216528 states and 236331 transitions. [2021-11-02 22:30:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:30:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 0 states have call successors, (0), 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 579 [2021-11-02 22:30:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:38,207 INFO L225 Difference]: With dead ends: 216528 [2021-11-02 22:30:38,207 INFO L226 Difference]: Without dead ends: 120156 [2021-11-02 22:30:38,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:30:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120156 states. [2021-11-02 22:30:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120156 to 106077. [2021-11-02 22:30:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106077 states, 106076 states have (on average 1.082572872280252) internal successors, (114835), 106076 states have internal predecessors, (114835), 0 states have call successors, (0), 0 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 22:30:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106077 states to 106077 states and 114835 transitions. [2021-11-02 22:30:40,586 INFO L78 Accepts]: Start accepts. Automaton has 106077 states and 114835 transitions. Word has length 579 [2021-11-02 22:30:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:40,587 INFO L470 AbstractCegarLoop]: Abstraction has 106077 states and 114835 transitions. [2021-11-02 22:30:40,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 0 states have call successors, (0), 0 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 22:30:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 106077 states and 114835 transitions. [2021-11-02 22:30:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-02 22:30:40,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:40,611 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:40,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 22:30:40,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c91020ee-dd93-405a-8e1c-b0e055fb0f2d/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:30:40,812 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:40,813 INFO L85 PathProgramCache]: Analyzing trace with hash 517758705, now seen corresponding path program 1 times [2021-11-02 22:30:40,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:40,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402386806] [2021-11-02 22:30:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:40,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:30:41,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:41,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402386806] [2021-11-02 22:30:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402386806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:41,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:41,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:30:41,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416959074] [2021-11-02 22:30:41,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:30:41,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:30:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:41,211 INFO L87 Difference]: Start difference. First operand 106077 states and 114835 transitions. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 22:30:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:45,969 INFO L93 Difference]: Finished difference Result 218983 states and 237098 transitions. [2021-11-02 22:30:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 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 667 [2021-11-02 22:30:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:46,108 INFO L225 Difference]: With dead ends: 218983 [2021-11-02 22:30:46,108 INFO L226 Difference]: Without dead ends: 113330 [2021-11-02 22:30:46,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113330 states. [2021-11-02 22:30:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113330 to 110323. [2021-11-02 22:30:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110323 states, 110322 states have (on average 1.0803466217073656) internal successors, (119186), 110322 states have internal predecessors, (119186), 0 states have call successors, (0), 0 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 22:30:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110323 states to 110323 states and 119186 transitions. [2021-11-02 22:30:47,814 INFO L78 Accepts]: Start accepts. Automaton has 110323 states and 119186 transitions. Word has length 667 [2021-11-02 22:30:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:47,815 INFO L470 AbstractCegarLoop]: Abstraction has 110323 states and 119186 transitions. [2021-11-02 22:30:47,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 22:30:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 110323 states and 119186 transitions. [2021-11-02 22:30:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2021-11-02 22:30:47,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:47,834 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:47,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:30:47,835 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -943841925, now seen corresponding path program 1 times [2021-11-02 22:30:47,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:47,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714596343] [2021-11-02 22:30:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:47,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:30:48,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:48,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714596343] [2021-11-02 22:30:48,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714596343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:48,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:48,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:30:48,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816457020] [2021-11-02 22:30:48,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:30:48,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:30:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:48,732 INFO L87 Difference]: Start difference. First operand 110323 states and 119186 transitions. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 22:30:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:53,552 INFO L93 Difference]: Finished difference Result 239391 states and 258120 transitions. [2021-11-02 22:30:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:30:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 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 671 [2021-11-02 22:30:53,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:53,766 INFO L225 Difference]: With dead ends: 239391 [2021-11-02 22:30:53,767 INFO L226 Difference]: Without dead ends: 128220 [2021-11-02 22:30:53,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:30:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128220 states. [2021-11-02 22:30:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128220 to 118828. [2021-11-02 22:30:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118828 states, 118827 states have (on average 1.0774234811953511) internal successors, (128027), 118827 states have internal predecessors, (128027), 0 states have call successors, (0), 0 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 22:30:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118828 states to 118828 states and 128027 transitions. [2021-11-02 22:30:55,803 INFO L78 Accepts]: Start accepts. Automaton has 118828 states and 128027 transitions. Word has length 671 [2021-11-02 22:30:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 118828 states and 128027 transitions. [2021-11-02 22:30:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 22:30:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 118828 states and 128027 transitions. [2021-11-02 22:30:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-02 22:30:55,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:55,825 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:55,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:30:55,825 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:30:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -91029827, now seen corresponding path program 1 times [2021-11-02 22:30:55,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:55,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162771464] [2021-11-02 22:30:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:55,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 747 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-02 22:30:56,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:56,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162771464] [2021-11-02 22:30:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162771464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:56,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:56,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:30:56,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910906351] [2021-11-02 22:30:56,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:30:56,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:30:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:30:56,067 INFO L87 Difference]: Start difference. First operand 118828 states and 128027 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 22:30:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:59,047 INFO L93 Difference]: Finished difference Result 248712 states and 267963 transitions. [2021-11-02 22:30:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:30:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 677 [2021-11-02 22:30:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:59,205 INFO L225 Difference]: With dead ends: 248712 [2021-11-02 22:30:59,205 INFO L226 Difference]: Without dead ends: 130736 [2021-11-02 22:30:59,266 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 22:30:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130736 states. [2021-11-02 22:31:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130736 to 122653. [2021-11-02 22:31:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122653 states, 122652 states have (on average 1.0738593744904281) internal successors, (131711), 122652 states have internal predecessors, (131711), 0 states have call successors, (0), 0 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 22:31:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122653 states to 122653 states and 131711 transitions. [2021-11-02 22:31:01,646 INFO L78 Accepts]: Start accepts. Automaton has 122653 states and 131711 transitions. Word has length 677 [2021-11-02 22:31:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 122653 states and 131711 transitions. [2021-11-02 22:31:01,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 22:31:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 122653 states and 131711 transitions.