./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6267d36e2eda753e26c9c989bedb16747ddf010783b33bee2d0cb2d2001d5ce --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:55:56,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:55:56,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:55:56,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:55:56,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:55:56,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:55:56,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:55:56,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:55:56,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:55:56,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:55:56,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:55:56,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:55:56,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:55:56,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:55:56,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:55:56,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:55:56,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:55:56,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:55:56,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:55:56,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:55:56,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:55:56,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:55:56,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:55:56,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:55:56,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:55:56,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:55:56,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:55:56,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:55:56,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:55:56,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:55:56,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:55:56,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:55:56,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:55:56,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:55:56,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:55:56,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:55:56,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:55:56,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:55:56,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:55:56,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:55:56,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:55:56,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:55:56,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:55:56,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:55:56,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:55:56,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:55:56,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:55:56,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:55:56,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:55:56,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:55:56,180 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:55:56,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:55:56,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:55:56,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:55:56,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:55:56,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:55:56,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:55:56,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:55:56,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:55:56,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:55:56,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:55:56,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:55:56,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:55:56,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:55:56,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:55:56,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:55:56,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:55:56,184 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:55:56,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:55:56,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:55:56,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:55:56,184 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_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6267d36e2eda753e26c9c989bedb16747ddf010783b33bee2d0cb2d2001d5ce [2021-12-06 23:55:56,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:55:56,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:55:56,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:55:56,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:55:56,396 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:55:56,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:55:56,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/data/774a95ee8/7086020b77ed4748b033ff8f8d89ca2c/FLAGb46ad864b [2021-12-06 23:55:56,829 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:55:56,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:55:56,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/data/774a95ee8/7086020b77ed4748b033ff8f8d89ca2c/FLAGb46ad864b [2021-12-06 23:55:56,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/data/774a95ee8/7086020b77ed4748b033ff8f8d89ca2c [2021-12-06 23:55:56,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:55:56,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:55:56,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:55:56,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:55:56,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:55:56,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:55:56" (1/1) ... [2021-12-06 23:55:56,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1db8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:56, skipping insertion in model container [2021-12-06 23:55:56,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:55:56" (1/1) ... [2021-12-06 23:55:56,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:55:56,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:55:57,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2021-12-06 23:55:57,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:55:57,109 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:55:57,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2021-12-06 23:55:57,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:55:57,173 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:55:57,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57 WrapperNode [2021-12-06 23:55:57,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:55:57,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:55:57,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:55:57,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:55:57,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,226 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 465 [2021-12-06 23:55:57,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:55:57,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:55:57,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:55:57,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:55:57,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:55:57,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:55:57,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:55:57,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:55:57,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (1/1) ... [2021-12-06 23:55:57,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:55:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:55:57,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:55:57,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89886945-154a-4969-806f-13e674ee3961/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:55:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:55:57,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:55:57,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:55:57,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:55:57,397 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:55:57,399 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:55:57,784 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:55:57,790 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:55:57,791 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:55:57,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:55:57 BoogieIcfgContainer [2021-12-06 23:55:57,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:55:57,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:55:57,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:55:57,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:55:57,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:55:56" (1/3) ... [2021-12-06 23:55:57,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d24f92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:55:57, skipping insertion in model container [2021-12-06 23:55:57,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:55:57" (2/3) ... [2021-12-06 23:55:57,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d24f92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:55:57, skipping insertion in model container [2021-12-06 23:55:57,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:55:57" (3/3) ... [2021-12-06 23:55:57,799 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:55:57,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:55:57,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:55:57,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:55:57,857 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:55:57,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:55:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:55:57,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:57,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:57,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash -479003881, now seen corresponding path program 1 times [2021-12-06 23:55:57,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:57,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032824916] [2021-12-06 23:55:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:57,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032824916] [2021-12-06 23:55:58,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032824916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:55:58,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395165659] [2021-12-06 23:55:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:55:58,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:55:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:55:58,076 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,102 INFO L93 Difference]: Finished difference Result 221 states and 376 transitions. [2021-12-06 23:55:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:55:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 23:55:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,113 INFO L225 Difference]: With dead ends: 221 [2021-12-06 23:55:58,113 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:55:58,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:55:58,119 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:55:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-06 23:55:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2021-12-06 23:55:58,154 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2021-12-06 23:55:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:58,155 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2021-12-06 23:55:58,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2021-12-06 23:55:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:55:58,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:58,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:58,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:55:58,158 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1296652331, now seen corresponding path program 1 times [2021-12-06 23:55:58,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112774255] [2021-12-06 23:55:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:58,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112774255] [2021-12-06 23:55:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112774255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:55:58,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597599032] [2021-12-06 23:55:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:55:58,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:55:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:55:58,268 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,332 INFO L93 Difference]: Finished difference Result 295 states and 499 transitions. [2021-12-06 23:55:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:55:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 23:55:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,335 INFO L225 Difference]: With dead ends: 295 [2021-12-06 23:55:58,335 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 23:55:58,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:55:58,338 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 135 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 871 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 23:55:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2021-12-06 23:55:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.553030303030303) internal successors, (205), 132 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2021-12-06 23:55:58,349 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 37 [2021-12-06 23:55:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:58,349 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2021-12-06 23:55:58,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2021-12-06 23:55:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 23:55:58,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:58,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:58,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:55:58,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 141893846, now seen corresponding path program 1 times [2021-12-06 23:55:58,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:58,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433353207] [2021-12-06 23:55:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:58,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433353207] [2021-12-06 23:55:58,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433353207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:55:58,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105755695] [2021-12-06 23:55:58,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:55:58,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:55:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,443 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,493 INFO L93 Difference]: Finished difference Result 281 states and 453 transitions. [2021-12-06 23:55:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:55:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 23:55:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,495 INFO L225 Difference]: With dead ends: 281 [2021-12-06 23:55:58,495 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 23:55:58,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,497 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 107 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 372 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 23:55:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-12-06 23:55:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5778894472361809) internal successors, (314), 199 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 314 transitions. [2021-12-06 23:55:58,508 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 314 transitions. Word has length 60 [2021-12-06 23:55:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:58,509 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 314 transitions. [2021-12-06 23:55:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 314 transitions. [2021-12-06 23:55:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 23:55:58,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:58,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:55:58,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -653639893, now seen corresponding path program 1 times [2021-12-06 23:55:58,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:58,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327978243] [2021-12-06 23:55:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:58,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327978243] [2021-12-06 23:55:58,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327978243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:55:58,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289126112] [2021-12-06 23:55:58,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:55:58,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:55:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,564 INFO L87 Difference]: Start difference. First operand 200 states and 314 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,581 INFO L93 Difference]: Finished difference Result 476 states and 770 transitions. [2021-12-06 23:55:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:55:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-06 23:55:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,584 INFO L225 Difference]: With dead ends: 476 [2021-12-06 23:55:58,585 INFO L226 Difference]: Without dead ends: 330 [2021-12-06 23:55:58,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,587 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 109 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 380 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-06 23:55:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2021-12-06 23:55:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.6055045871559632) internal successors, (525), 327 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2021-12-06 23:55:58,608 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 62 [2021-12-06 23:55:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:58,608 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2021-12-06 23:55:58,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2021-12-06 23:55:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 23:55:58,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:58,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:58,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:55:58,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1628052192, now seen corresponding path program 1 times [2021-12-06 23:55:58,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69463854] [2021-12-06 23:55:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:58,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69463854] [2021-12-06 23:55:58,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69463854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:55:58,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514697290] [2021-12-06 23:55:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:55:58,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:55:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,674 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,695 INFO L93 Difference]: Finished difference Result 844 states and 1375 transitions. [2021-12-06 23:55:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:55:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-06 23:55:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,699 INFO L225 Difference]: With dead ends: 844 [2021-12-06 23:55:58,699 INFO L226 Difference]: Without dead ends: 570 [2021-12-06 23:55:58,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:58,700 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 103 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 381 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-12-06 23:55:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2021-12-06 23:55:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.617283950617284) internal successors, (917), 567 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 917 transitions. [2021-12-06 23:55:58,720 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 917 transitions. Word has length 64 [2021-12-06 23:55:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:58,720 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 917 transitions. [2021-12-06 23:55:58,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 917 transitions. [2021-12-06 23:55:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:55:58,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:58,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:58,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:55:58,722 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1698900981, now seen corresponding path program 1 times [2021-12-06 23:55:58,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:58,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477384496] [2021-12-06 23:55:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:58,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:58,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477384496] [2021-12-06 23:55:58,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477384496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:58,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:58,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:55:58,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469419397] [2021-12-06 23:55:58,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:58,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:55:58,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:55:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:55:58,772 INFO L87 Difference]: Start difference. First operand 568 states and 917 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:58,929 INFO L93 Difference]: Finished difference Result 2444 states and 4039 transitions. [2021-12-06 23:55:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:55:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-06 23:55:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:58,942 INFO L225 Difference]: With dead ends: 2444 [2021-12-06 23:55:58,942 INFO L226 Difference]: Without dead ends: 1930 [2021-12-06 23:55:58,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:55:58,945 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 863 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:58,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1352 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:55:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-12-06 23:55:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1017. [2021-12-06 23:55:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.6289370078740157) internal successors, (1655), 1016 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1655 transitions. [2021-12-06 23:55:59,009 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1655 transitions. Word has length 66 [2021-12-06 23:55:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:59,009 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1655 transitions. [2021-12-06 23:55:59,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1655 transitions. [2021-12-06 23:55:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 23:55:59,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:59,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:59,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:55:59,011 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -796509765, now seen corresponding path program 1 times [2021-12-06 23:55:59,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:59,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637323343] [2021-12-06 23:55:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:59,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637323343] [2021-12-06 23:55:59,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637323343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:59,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:59,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:55:59,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968068411] [2021-12-06 23:55:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:59,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:55:59,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:55:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:55:59,066 INFO L87 Difference]: Start difference. First operand 1017 states and 1655 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:59,160 INFO L93 Difference]: Finished difference Result 2966 states and 4892 transitions. [2021-12-06 23:55:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:55:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 23:55:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:59,172 INFO L225 Difference]: With dead ends: 2966 [2021-12-06 23:55:59,173 INFO L226 Difference]: Without dead ends: 2003 [2021-12-06 23:55:59,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:55:59,175 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 385 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:59,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 678 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-12-06 23:55:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1501. [2021-12-06 23:55:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.6353333333333333) internal successors, (2453), 1500 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2453 transitions. [2021-12-06 23:55:59,244 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2453 transitions. Word has length 67 [2021-12-06 23:55:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:59,245 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2453 transitions. [2021-12-06 23:55:59,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2453 transitions. [2021-12-06 23:55:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:55:59,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:59,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:59,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:55:59,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2022785868, now seen corresponding path program 1 times [2021-12-06 23:55:59,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033574080] [2021-12-06 23:55:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:59,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:59,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033574080] [2021-12-06 23:55:59,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033574080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:59,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:59,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:55:59,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069969833] [2021-12-06 23:55:59,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:59,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:55:59,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:55:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:59,294 INFO L87 Difference]: Start difference. First operand 1501 states and 2453 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:59,362 INFO L93 Difference]: Finished difference Result 3316 states and 5473 transitions. [2021-12-06 23:55:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:55:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-06 23:55:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:59,376 INFO L225 Difference]: With dead ends: 3316 [2021-12-06 23:55:59,377 INFO L226 Difference]: Without dead ends: 2278 [2021-12-06 23:55:59,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:59,379 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 116 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:59,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 467 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-12-06 23:55:59,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2276. [2021-12-06 23:55:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.6360439560439561) internal successors, (3722), 2275 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3722 transitions. [2021-12-06 23:55:59,449 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3722 transitions. Word has length 68 [2021-12-06 23:55:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:59,450 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 3722 transitions. [2021-12-06 23:55:59,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3722 transitions. [2021-12-06 23:55:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:55:59,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:59,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:59,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:55:59,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -675827220, now seen corresponding path program 1 times [2021-12-06 23:55:59,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:59,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017630253] [2021-12-06 23:55:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:59,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:59,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017630253] [2021-12-06 23:55:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017630253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:59,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:55:59,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792654130] [2021-12-06 23:55:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:59,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:55:59,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:55:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:55:59,502 INFO L87 Difference]: Start difference. First operand 2276 states and 3722 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:59,642 INFO L93 Difference]: Finished difference Result 6680 states and 10988 transitions. [2021-12-06 23:55:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:55:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-06 23:55:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:59,664 INFO L225 Difference]: With dead ends: 6680 [2021-12-06 23:55:59,664 INFO L226 Difference]: Without dead ends: 4460 [2021-12-06 23:55:59,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:55:59,668 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 384 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:59,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 626 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-12-06 23:55:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3349. [2021-12-06 23:55:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 1.6314217443249701) internal successors, (5462), 3348 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5462 transitions. [2021-12-06 23:55:59,782 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5462 transitions. Word has length 68 [2021-12-06 23:55:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:59,782 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 5462 transitions. [2021-12-06 23:55:59,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5462 transitions. [2021-12-06 23:55:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:55:59,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:59,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:59,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:55:59,783 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:55:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash -446846068, now seen corresponding path program 1 times [2021-12-06 23:55:59,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116054503] [2021-12-06 23:55:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:59,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:55:59,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116054503] [2021-12-06 23:55:59,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116054503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:55:59,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:55:59,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:55:59,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275084353] [2021-12-06 23:55:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:55:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:55:59,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:55:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:59,827 INFO L87 Difference]: Start difference. First operand 3349 states and 5462 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:55:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:59,922 INFO L93 Difference]: Finished difference Result 6705 states and 10949 transitions. [2021-12-06 23:55:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:55:59,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-06 23:55:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:59,943 INFO L225 Difference]: With dead ends: 6705 [2021-12-06 23:55:59,943 INFO L226 Difference]: Without dead ends: 4777 [2021-12-06 23:55:59,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:55:59,947 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 104 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:59,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:55:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-12-06 23:56:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2021-12-06 23:56:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4774 states have (on average 1.6206535400083788) internal successors, (7737), 4774 states have internal predecessors, (7737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7737 transitions. [2021-12-06 23:56:00,128 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7737 transitions. Word has length 68 [2021-12-06 23:56:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:00,128 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 7737 transitions. [2021-12-06 23:56:00,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7737 transitions. [2021-12-06 23:56:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:56:00,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:00,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:00,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:56:00,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1835740012, now seen corresponding path program 1 times [2021-12-06 23:56:00,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:00,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479849175] [2021-12-06 23:56:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:00,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:00,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479849175] [2021-12-06 23:56:00,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479849175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:00,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:00,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:00,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88658720] [2021-12-06 23:56:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:00,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:00,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:00,169 INFO L87 Difference]: Start difference. First operand 4775 states and 7737 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:00,373 INFO L93 Difference]: Finished difference Result 10402 states and 16876 transitions. [2021-12-06 23:56:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-06 23:56:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:00,412 INFO L225 Difference]: With dead ends: 10402 [2021-12-06 23:56:00,412 INFO L226 Difference]: Without dead ends: 7073 [2021-12-06 23:56:00,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:00,417 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:00,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 458 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2021-12-06 23:56:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7071. [2021-12-06 23:56:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 1.608062234794908) internal successors, (11369), 7070 states have internal predecessors, (11369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 11369 transitions. [2021-12-06 23:56:00,631 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 11369 transitions. Word has length 68 [2021-12-06 23:56:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:00,631 INFO L470 AbstractCegarLoop]: Abstraction has 7071 states and 11369 transitions. [2021-12-06 23:56:00,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 11369 transitions. [2021-12-06 23:56:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 23:56:00,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:00,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:00,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:56:00,632 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1060631278, now seen corresponding path program 1 times [2021-12-06 23:56:00,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055687670] [2021-12-06 23:56:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:00,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:00,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055687670] [2021-12-06 23:56:00,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055687670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:00,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:00,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:56:00,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214143419] [2021-12-06 23:56:00,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:00,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:56:00,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:56:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:56:00,672 INFO L87 Difference]: Start difference. First operand 7071 states and 11369 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:01,013 INFO L93 Difference]: Finished difference Result 22178 states and 35738 transitions. [2021-12-06 23:56:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:56:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 23:56:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:01,059 INFO L225 Difference]: With dead ends: 22178 [2021-12-06 23:56:01,059 INFO L226 Difference]: Without dead ends: 15187 [2021-12-06 23:56:01,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:01,071 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 382 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:01,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 670 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2021-12-06 23:56:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 11086. [2021-12-06 23:56:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11086 states, 11085 states have (on average 1.5983761840324764) internal successors, (17718), 11085 states have internal predecessors, (17718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 17718 transitions. [2021-12-06 23:56:01,360 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 17718 transitions. Word has length 69 [2021-12-06 23:56:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:01,360 INFO L470 AbstractCegarLoop]: Abstraction has 11086 states and 17718 transitions. [2021-12-06 23:56:01,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 17718 transitions. [2021-12-06 23:56:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:56:01,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:01,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:56:01,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:01,362 INFO L85 PathProgramCache]: Analyzing trace with hash 808037418, now seen corresponding path program 1 times [2021-12-06 23:56:01,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:01,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237564215] [2021-12-06 23:56:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:01,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:01,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237564215] [2021-12-06 23:56:01,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237564215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:01,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:01,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518906259] [2021-12-06 23:56:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:01,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:01,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:01,437 INFO L87 Difference]: Start difference. First operand 11086 states and 17718 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:01,709 INFO L93 Difference]: Finished difference Result 22094 states and 35327 transitions. [2021-12-06 23:56:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:56:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 23:56:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:01,728 INFO L225 Difference]: With dead ends: 22094 [2021-12-06 23:56:01,728 INFO L226 Difference]: Without dead ends: 11088 [2021-12-06 23:56:01,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:56:01,739 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 283 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:01,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 543 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11088 states. [2021-12-06 23:56:01,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11088 to 11086. [2021-12-06 23:56:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11086 states, 11085 states have (on average 1.5870996842580063) internal successors, (17593), 11085 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 17593 transitions. [2021-12-06 23:56:02,028 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 17593 transitions. Word has length 71 [2021-12-06 23:56:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:02,028 INFO L470 AbstractCegarLoop]: Abstraction has 11086 states and 17593 transitions. [2021-12-06 23:56:02,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 17593 transitions. [2021-12-06 23:56:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 23:56:02,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:02,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:02,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:56:02,030 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash 653988143, now seen corresponding path program 1 times [2021-12-06 23:56:02,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795679836] [2021-12-06 23:56:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:02,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:02,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:02,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795679836] [2021-12-06 23:56:02,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795679836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:02,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:02,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:02,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455205781] [2021-12-06 23:56:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:02,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:02,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:02,109 INFO L87 Difference]: Start difference. First operand 11086 states and 17593 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:02,486 INFO L93 Difference]: Finished difference Result 31750 states and 50527 transitions. [2021-12-06 23:56:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:56:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 23:56:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:02,518 INFO L225 Difference]: With dead ends: 31750 [2021-12-06 23:56:02,518 INFO L226 Difference]: Without dead ends: 20744 [2021-12-06 23:56:02,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:56:02,540 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 380 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 550 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:56:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20744 states. [2021-12-06 23:56:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20744 to 20742. [2021-12-06 23:56:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20742 states, 20741 states have (on average 1.5743696060942096) internal successors, (32654), 20741 states have internal predecessors, (32654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20742 states to 20742 states and 32654 transitions. [2021-12-06 23:56:03,031 INFO L78 Accepts]: Start accepts. Automaton has 20742 states and 32654 transitions. Word has length 74 [2021-12-06 23:56:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:03,031 INFO L470 AbstractCegarLoop]: Abstraction has 20742 states and 32654 transitions. [2021-12-06 23:56:03,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20742 states and 32654 transitions. [2021-12-06 23:56:03,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 23:56:03,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:03,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:03,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 23:56:03,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1629779693, now seen corresponding path program 1 times [2021-12-06 23:56:03,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022002999] [2021-12-06 23:56:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:03,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:03,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:03,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022002999] [2021-12-06 23:56:03,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022002999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:03,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:03,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:03,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487853915] [2021-12-06 23:56:03,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:03,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:03,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:03,088 INFO L87 Difference]: Start difference. First operand 20742 states and 32654 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:03,755 INFO L93 Difference]: Finished difference Result 40553 states and 63100 transitions. [2021-12-06 23:56:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:56:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 23:56:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:03,807 INFO L225 Difference]: With dead ends: 40553 [2021-12-06 23:56:03,807 INFO L226 Difference]: Without dead ends: 40551 [2021-12-06 23:56:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:56:03,816 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 341 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:03,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 887 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40551 states. [2021-12-06 23:56:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40551 to 21828. [2021-12-06 23:56:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21828 states, 21827 states have (on average 1.545379575754799) internal successors, (33731), 21827 states have internal predecessors, (33731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 33731 transitions. [2021-12-06 23:56:04,527 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 33731 transitions. Word has length 75 [2021-12-06 23:56:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:04,527 INFO L470 AbstractCegarLoop]: Abstraction has 21828 states and 33731 transitions. [2021-12-06 23:56:04,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 33731 transitions. [2021-12-06 23:56:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 23:56:04,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:04,530 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:04,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 23:56:04,530 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1037650854, now seen corresponding path program 1 times [2021-12-06 23:56:04,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:04,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742822254] [2021-12-06 23:56:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:04,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:56:04,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:04,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742822254] [2021-12-06 23:56:04,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742822254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:04,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:04,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:04,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062651089] [2021-12-06 23:56:04,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:04,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:04,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:04,587 INFO L87 Difference]: Start difference. First operand 21828 states and 33731 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:05,540 INFO L93 Difference]: Finished difference Result 53616 states and 83123 transitions. [2021-12-06 23:56:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:56:05,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 101 [2021-12-06 23:56:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:05,587 INFO L225 Difference]: With dead ends: 53616 [2021-12-06 23:56:05,587 INFO L226 Difference]: Without dead ends: 43014 [2021-12-06 23:56:05,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:56:05,603 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 489 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:05,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 835 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43014 states. [2021-12-06 23:56:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43014 to 33572. [2021-12-06 23:56:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33572 states, 33571 states have (on average 1.5427303327276518) internal successors, (51791), 33571 states have internal predecessors, (51791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33572 states to 33572 states and 51791 transitions. [2021-12-06 23:56:06,508 INFO L78 Accepts]: Start accepts. Automaton has 33572 states and 51791 transitions. Word has length 101 [2021-12-06 23:56:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:06,508 INFO L470 AbstractCegarLoop]: Abstraction has 33572 states and 51791 transitions. [2021-12-06 23:56:06,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33572 states and 51791 transitions. [2021-12-06 23:56:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 23:56:06,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:06,511 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:06,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:56:06,511 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash 787684506, now seen corresponding path program 1 times [2021-12-06 23:56:06,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609240301] [2021-12-06 23:56:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:06,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 23:56:06,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609240301] [2021-12-06 23:56:06,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609240301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:06,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:06,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:06,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511392258] [2021-12-06 23:56:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:06,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:06,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:06,559 INFO L87 Difference]: Start difference. First operand 33572 states and 51791 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:07,544 INFO L93 Difference]: Finished difference Result 60140 states and 93241 transitions. [2021-12-06 23:56:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:56:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 101 [2021-12-06 23:56:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:07,604 INFO L225 Difference]: With dead ends: 60140 [2021-12-06 23:56:07,604 INFO L226 Difference]: Without dead ends: 49798 [2021-12-06 23:56:07,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:56:07,623 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 492 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:07,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 948 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49798 states. [2021-12-06 23:56:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49798 to 45552. [2021-12-06 23:56:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45552 states, 45551 states have (on average 1.5440056200742025) internal successors, (70331), 45551 states have internal predecessors, (70331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45552 states to 45552 states and 70331 transitions. [2021-12-06 23:56:09,060 INFO L78 Accepts]: Start accepts. Automaton has 45552 states and 70331 transitions. Word has length 101 [2021-12-06 23:56:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 45552 states and 70331 transitions. [2021-12-06 23:56:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45552 states and 70331 transitions. [2021-12-06 23:56:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 23:56:09,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:09,063 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:09,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:56:09,063 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1224696710, now seen corresponding path program 1 times [2021-12-06 23:56:09,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:09,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799603127] [2021-12-06 23:56:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:09,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:56:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:09,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799603127] [2021-12-06 23:56:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799603127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:09,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:09,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:09,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366563570] [2021-12-06 23:56:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:09,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:09,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:09,114 INFO L87 Difference]: Start difference. First operand 45552 states and 70331 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:10,416 INFO L93 Difference]: Finished difference Result 64276 states and 99649 transitions. [2021-12-06 23:56:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:56:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 101 [2021-12-06 23:56:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:10,483 INFO L225 Difference]: With dead ends: 64276 [2021-12-06 23:56:10,483 INFO L226 Difference]: Without dead ends: 53934 [2021-12-06 23:56:10,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:56:10,502 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 487 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:10,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 918 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53934 states. [2021-12-06 23:56:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53934 to 52232. [2021-12-06 23:56:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52232 states, 52231 states have (on average 1.5456529647144417) internal successors, (80731), 52231 states have internal predecessors, (80731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52232 states to 52232 states and 80731 transitions. [2021-12-06 23:56:11,851 INFO L78 Accepts]: Start accepts. Automaton has 52232 states and 80731 transitions. Word has length 101 [2021-12-06 23:56:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:11,851 INFO L470 AbstractCegarLoop]: Abstraction has 52232 states and 80731 transitions. [2021-12-06 23:56:11,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52232 states and 80731 transitions. [2021-12-06 23:56:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:56:11,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:11,854 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:11,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:56:11,854 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash 269729270, now seen corresponding path program 1 times [2021-12-06 23:56:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910122245] [2021-12-06 23:56:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:11,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:56:11,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910122245] [2021-12-06 23:56:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910122245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:11,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:11,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:56:11,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88225251] [2021-12-06 23:56:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:11,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:56:11,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:56:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:56:11,899 INFO L87 Difference]: Start difference. First operand 52232 states and 80731 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:13,251 INFO L93 Difference]: Finished difference Result 85235 states and 132380 transitions. [2021-12-06 23:56:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:56:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 102 [2021-12-06 23:56:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:13,335 INFO L225 Difference]: With dead ends: 85235 [2021-12-06 23:56:13,335 INFO L226 Difference]: Without dead ends: 67849 [2021-12-06 23:56:13,356 INFO L932 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 [2021-12-06 23:56:13,356 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 216 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:13,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 632 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67849 states. [2021-12-06 23:56:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67849 to 66149. [2021-12-06 23:56:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66149 states, 66148 states have (on average 1.5457005502811876) internal successors, (102245), 66148 states have internal predecessors, (102245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66149 states to 66149 states and 102245 transitions. [2021-12-06 23:56:15,117 INFO L78 Accepts]: Start accepts. Automaton has 66149 states and 102245 transitions. Word has length 102 [2021-12-06 23:56:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:15,117 INFO L470 AbstractCegarLoop]: Abstraction has 66149 states and 102245 transitions. [2021-12-06 23:56:15,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 66149 states and 102245 transitions. [2021-12-06 23:56:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:56:15,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:15,119 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:56:15,120 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash 692431096, now seen corresponding path program 1 times [2021-12-06 23:56:15,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:15,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675573312] [2021-12-06 23:56:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:15,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:56:15,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675573312] [2021-12-06 23:56:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675573312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:15,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:15,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591594172] [2021-12-06 23:56:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:15,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:15,157 INFO L87 Difference]: Start difference. First operand 66149 states and 102245 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:17,578 INFO L93 Difference]: Finished difference Result 143003 states and 221693 transitions. [2021-12-06 23:56:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 102 [2021-12-06 23:56:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:17,745 INFO L225 Difference]: With dead ends: 143003 [2021-12-06 23:56:17,745 INFO L226 Difference]: Without dead ends: 111837 [2021-12-06 23:56:17,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:17,783 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 92 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:17,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 373 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111837 states. [2021-12-06 23:56:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111837 to 111559. [2021-12-06 23:56:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111559 states, 111558 states have (on average 1.5450617615948654) internal successors, (172364), 111558 states have internal predecessors, (172364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111559 states to 111559 states and 172364 transitions. [2021-12-06 23:56:21,205 INFO L78 Accepts]: Start accepts. Automaton has 111559 states and 172364 transitions. Word has length 102 [2021-12-06 23:56:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:21,205 INFO L470 AbstractCegarLoop]: Abstraction has 111559 states and 172364 transitions. [2021-12-06 23:56:21,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 111559 states and 172364 transitions. [2021-12-06 23:56:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:56:21,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:21,207 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:56:21,208 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1579286360, now seen corresponding path program 1 times [2021-12-06 23:56:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126468060] [2021-12-06 23:56:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:21,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:21,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126468060] [2021-12-06 23:56:21,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126468060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:21,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:21,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:21,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289902565] [2021-12-06 23:56:21,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:21,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:21,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:21,244 INFO L87 Difference]: Start difference. First operand 111559 states and 172364 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:26,095 INFO L93 Difference]: Finished difference Result 329943 states and 508892 transitions. [2021-12-06 23:56:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:26,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 23:56:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:26,423 INFO L225 Difference]: With dead ends: 329943 [2021-12-06 23:56:26,423 INFO L226 Difference]: Without dead ends: 218454 [2021-12-06 23:56:26,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:26,476 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 134 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:26,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 458 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218454 states. [2021-12-06 23:56:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218454 to 218452. [2021-12-06 23:56:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218452 states, 218451 states have (on average 1.5308375791367401) internal successors, (334413), 218451 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218452 states to 218452 states and 334413 transitions. [2021-12-06 23:56:33,088 INFO L78 Accepts]: Start accepts. Automaton has 218452 states and 334413 transitions. Word has length 103 [2021-12-06 23:56:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:33,089 INFO L470 AbstractCegarLoop]: Abstraction has 218452 states and 334413 transitions. [2021-12-06 23:56:33,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 218452 states and 334413 transitions. [2021-12-06 23:56:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:56:33,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:33,093 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:33,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 23:56:33,093 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:33,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1783858254, now seen corresponding path program 1 times [2021-12-06 23:56:33,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:33,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243319368] [2021-12-06 23:56:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:33,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:33,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:33,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243319368] [2021-12-06 23:56:33,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243319368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:33,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044216259] [2021-12-06 23:56:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:33,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:33,129 INFO L87 Difference]: Start difference. First operand 218452 states and 334413 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:42,962 INFO L93 Difference]: Finished difference Result 645927 states and 986911 transitions. [2021-12-06 23:56:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 23:56:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:43,728 INFO L225 Difference]: With dead ends: 645927 [2021-12-06 23:56:43,728 INFO L226 Difference]: Without dead ends: 427611 [2021-12-06 23:56:43,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:43,849 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 153 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:43,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 491 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427611 states. [2021-12-06 23:56:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427611 to 427609. [2021-12-06 23:56:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427609 states, 427608 states have (on average 1.5160123290490355) internal successors, (648259), 427608 states have internal predecessors, (648259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:57,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427609 states to 427609 states and 648259 transitions. [2021-12-06 23:56:57,091 INFO L78 Accepts]: Start accepts. Automaton has 427609 states and 648259 transitions. Word has length 103 [2021-12-06 23:56:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:57,091 INFO L470 AbstractCegarLoop]: Abstraction has 427609 states and 648259 transitions. [2021-12-06 23:56:57,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:56:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 427609 states and 648259 transitions. [2021-12-06 23:56:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:56:57,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:57,097 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:56:57,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:56:57,098 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1753174351, now seen corresponding path program 1 times [2021-12-06 23:56:57,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:57,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714570665] [2021-12-06 23:56:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:57,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:57,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714570665] [2021-12-06 23:56:57,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714570665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:57,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:57,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:57,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218392782] [2021-12-06 23:56:57,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:57,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:57,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:57,151 INFO L87 Difference]: Start difference. First operand 427609 states and 648259 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:07,049 INFO L93 Difference]: Finished difference Result 791935 states and 1201993 transitions. [2021-12-06 23:57:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 23:57:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:07,624 INFO L225 Difference]: With dead ends: 791935 [2021-12-06 23:57:07,624 INFO L226 Difference]: Without dead ends: 364585 [2021-12-06 23:57:07,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:07,767 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 84 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:07,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 440 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364585 states. [2021-12-06 23:57:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364585 to 364355. [2021-12-06 23:57:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364355 states, 364354 states have (on average 1.5098914791658662) internal successors, (550135), 364354 states have internal predecessors, (550135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364355 states to 364355 states and 550135 transitions. [2021-12-06 23:57:19,133 INFO L78 Accepts]: Start accepts. Automaton has 364355 states and 550135 transitions. Word has length 103 [2021-12-06 23:57:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:19,133 INFO L470 AbstractCegarLoop]: Abstraction has 364355 states and 550135 transitions. [2021-12-06 23:57:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 364355 states and 550135 transitions. [2021-12-06 23:57:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:57:19,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:19,138 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:57:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 23:57:19,138 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash 529411729, now seen corresponding path program 1 times [2021-12-06 23:57:19,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878782390] [2021-12-06 23:57:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:19,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878782390] [2021-12-06 23:57:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878782390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:19,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:19,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:19,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399781883] [2021-12-06 23:57:19,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:19,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:19,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:19,181 INFO L87 Difference]: Start difference. First operand 364355 states and 550135 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:24,102 INFO L93 Difference]: Finished difference Result 518679 states and 783749 transitions. [2021-12-06 23:57:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:24,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 23:57:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:24,358 INFO L225 Difference]: With dead ends: 518679 [2021-12-06 23:57:24,359 INFO L226 Difference]: Without dead ends: 154583 [2021-12-06 23:57:24,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:24,505 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 64 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:24,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 411 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154583 states. [2021-12-06 23:57:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154583 to 154069. [2021-12-06 23:57:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154069 states, 154068 states have (on average 1.5037191370044396) internal successors, (231675), 154068 states have internal predecessors, (231675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154069 states to 154069 states and 231675 transitions. [2021-12-06 23:57:29,163 INFO L78 Accepts]: Start accepts. Automaton has 154069 states and 231675 transitions. Word has length 103 [2021-12-06 23:57:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 154069 states and 231675 transitions. [2021-12-06 23:57:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 154069 states and 231675 transitions. [2021-12-06 23:57:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:57:29,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:29,167 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:57:29,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:57:29,167 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1115615535, now seen corresponding path program 1 times [2021-12-06 23:57:29,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:29,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520009161] [2021-12-06 23:57:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:29,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:29,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:29,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520009161] [2021-12-06 23:57:29,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520009161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:29,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:29,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:29,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376249250] [2021-12-06 23:57:29,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:29,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:29,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:29,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:29,204 INFO L87 Difference]: Start difference. First operand 154069 states and 231675 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:31,607 INFO L93 Difference]: Finished difference Result 226067 states and 340145 transitions. [2021-12-06 23:57:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-06 23:57:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:31,706 INFO L225 Difference]: With dead ends: 226067 [2021-12-06 23:57:31,706 INFO L226 Difference]: Without dead ends: 72261 [2021-12-06 23:57:31,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:31,775 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 56 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:31,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 370 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72261 states. [2021-12-06 23:57:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72261 to 72235. [2021-12-06 23:57:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72235 states, 72234 states have (on average 1.4960683334717724) internal successors, (108067), 72234 states have internal predecessors, (108067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72235 states to 72235 states and 108067 transitions. [2021-12-06 23:57:34,044 INFO L78 Accepts]: Start accepts. Automaton has 72235 states and 108067 transitions. Word has length 103 [2021-12-06 23:57:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:34,044 INFO L470 AbstractCegarLoop]: Abstraction has 72235 states and 108067 transitions. [2021-12-06 23:57:34,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 72235 states and 108067 transitions. [2021-12-06 23:57:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 23:57:34,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:34,047 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:57:34,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:57:34,047 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1922997902, now seen corresponding path program 1 times [2021-12-06 23:57:34,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049744772] [2021-12-06 23:57:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:34,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:57:34,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049744772] [2021-12-06 23:57:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049744772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:34,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:34,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065904388] [2021-12-06 23:57:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:34,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:34,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:34,132 INFO L87 Difference]: Start difference. First operand 72235 states and 108067 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:37,392 INFO L93 Difference]: Finished difference Result 172891 states and 258486 transitions. [2021-12-06 23:57:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:57:37,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 104 [2021-12-06 23:57:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:37,550 INFO L225 Difference]: With dead ends: 172891 [2021-12-06 23:57:37,550 INFO L226 Difference]: Without dead ends: 119554 [2021-12-06 23:57:37,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:37,578 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 333 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:37,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 563 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119554 states. [2021-12-06 23:57:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119554 to 108826. [2021-12-06 23:57:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108826 states, 108825 states have (on average 1.4914220078107052) internal successors, (162304), 108825 states have internal predecessors, (162304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108826 states to 108826 states and 162304 transitions. [2021-12-06 23:57:41,276 INFO L78 Accepts]: Start accepts. Automaton has 108826 states and 162304 transitions. Word has length 104 [2021-12-06 23:57:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:41,276 INFO L470 AbstractCegarLoop]: Abstraction has 108826 states and 162304 transitions. [2021-12-06 23:57:41,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 108826 states and 162304 transitions. [2021-12-06 23:57:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 23:57:41,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:41,278 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:57:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 23:57:41,279 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1947520823, now seen corresponding path program 1 times [2021-12-06 23:57:41,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:41,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103423072] [2021-12-06 23:57:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:41,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:57:41,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103423072] [2021-12-06 23:57:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103423072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:41,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:41,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111907294] [2021-12-06 23:57:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:41,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:41,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:41,352 INFO L87 Difference]: Start difference. First operand 108826 states and 162304 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:47,087 INFO L93 Difference]: Finished difference Result 268743 states and 399661 transitions. [2021-12-06 23:57:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:57:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 104 [2021-12-06 23:57:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:47,457 INFO L225 Difference]: With dead ends: 268743 [2021-12-06 23:57:47,457 INFO L226 Difference]: Without dead ends: 201273 [2021-12-06 23:57:47,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:47,499 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 340 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:47,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 595 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201273 states. [2021-12-06 23:57:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201273 to 171973. [2021-12-06 23:57:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171973 states, 171972 states have (on average 1.4891668411136696) internal successors, (256095), 171972 states have internal predecessors, (256095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171973 states to 171973 states and 256095 transitions. [2021-12-06 23:57:53,552 INFO L78 Accepts]: Start accepts. Automaton has 171973 states and 256095 transitions. Word has length 104 [2021-12-06 23:57:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:53,552 INFO L470 AbstractCegarLoop]: Abstraction has 171973 states and 256095 transitions. [2021-12-06 23:57:53,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 171973 states and 256095 transitions. [2021-12-06 23:57:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 23:57:53,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:53,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:53,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 23:57:53,554 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash -873766954, now seen corresponding path program 1 times [2021-12-06 23:57:53,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:53,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292831945] [2021-12-06 23:57:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:53,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 23:57:53,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292831945] [2021-12-06 23:57:53,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292831945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:53,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:53,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:53,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354500820] [2021-12-06 23:57:53,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:53,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:53,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:53,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:53,590 INFO L87 Difference]: Start difference. First operand 171973 states and 256095 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:59,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:59,849 INFO L93 Difference]: Finished difference Result 267961 states and 400616 transitions. [2021-12-06 23:57:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 106 [2021-12-06 23:57:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:00,197 INFO L225 Difference]: With dead ends: 267961 [2021-12-06 23:58:00,198 INFO L226 Difference]: Without dead ends: 218267 [2021-12-06 23:58:00,248 INFO L932 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 [2021-12-06 23:58:00,248 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 206 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:00,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 706 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218267 states. [2021-12-06 23:58:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218267 to 197255. [2021-12-06 23:58:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197255 states, 197254 states have (on average 1.4889685380271123) internal successors, (293705), 197254 states have internal predecessors, (293705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197255 states to 197255 states and 293705 transitions. [2021-12-06 23:58:07,469 INFO L78 Accepts]: Start accepts. Automaton has 197255 states and 293705 transitions. Word has length 106 [2021-12-06 23:58:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:07,469 INFO L470 AbstractCegarLoop]: Abstraction has 197255 states and 293705 transitions. [2021-12-06 23:58:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 197255 states and 293705 transitions. [2021-12-06 23:58:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 23:58:07,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:07,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:07,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 23:58:07,471 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash -172702376, now seen corresponding path program 1 times [2021-12-06 23:58:07,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645625885] [2021-12-06 23:58:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 23:58:07,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:07,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645625885] [2021-12-06 23:58:07,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645625885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:07,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:07,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:58:07,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639952997] [2021-12-06 23:58:07,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:07,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:07,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:07,518 INFO L87 Difference]: Start difference. First operand 197255 states and 293705 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:17,933 INFO L93 Difference]: Finished difference Result 443751 states and 661515 transitions. [2021-12-06 23:58:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 106 [2021-12-06 23:58:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:18,443 INFO L225 Difference]: With dead ends: 443751 [2021-12-06 23:58:18,443 INFO L226 Difference]: Without dead ends: 341821 [2021-12-06 23:58:18,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:18,525 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 80 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:18,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 385 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341821 states. [2021-12-06 23:58:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341821 to 341139. [2021-12-06 23:58:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341139 states, 341138 states have (on average 1.4861932707584613) internal successors, (506997), 341138 states have internal predecessors, (506997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341139 states to 341139 states and 506997 transitions. [2021-12-06 23:58:31,664 INFO L78 Accepts]: Start accepts. Automaton has 341139 states and 506997 transitions. Word has length 106 [2021-12-06 23:58:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 341139 states and 506997 transitions. [2021-12-06 23:58:31,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 341139 states and 506997 transitions. [2021-12-06 23:58:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 23:58:31,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:31,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:31,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 23:58:31,667 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1202434574, now seen corresponding path program 1 times [2021-12-06 23:58:31,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074726815] [2021-12-06 23:58:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:31,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:58:31,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074726815] [2021-12-06 23:58:31,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074726815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:31,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:58:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191670304] [2021-12-06 23:58:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:31,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:31,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:31,699 INFO L87 Difference]: Start difference. First operand 341139 states and 506997 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:58:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:53,334 INFO L93 Difference]: Finished difference Result 1009589 states and 1497158 transitions. [2021-12-06 23:58:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-06 23:58:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:54,545 INFO L225 Difference]: With dead ends: 1009589 [2021-12-06 23:58:54,545 INFO L226 Difference]: Without dead ends: 668685 [2021-12-06 23:58:54,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:58:54,735 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 142 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:54,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 486 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668685 states. [2021-12-06 23:59:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668685 to 668683. [2021-12-06 23:59:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668683 states, 668682 states have (on average 1.4718236770243553) internal successors, (984182), 668682 states have internal predecessors, (984182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668683 states to 668683 states and 984182 transitions. [2021-12-06 23:59:21,069 INFO L78 Accepts]: Start accepts. Automaton has 668683 states and 984182 transitions. Word has length 107 [2021-12-06 23:59:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:21,070 INFO L470 AbstractCegarLoop]: Abstraction has 668683 states and 984182 transitions. [2021-12-06 23:59:21,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:59:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 668683 states and 984182 transitions. [2021-12-06 23:59:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 23:59:21,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:21,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:21,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 23:59:21,073 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2075850472, now seen corresponding path program 1 times [2021-12-06 23:59:21,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:21,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137970786] [2021-12-06 23:59:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:21,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:59:21,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137970786] [2021-12-06 23:59:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137970786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:21,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:59:21,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:59:21,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751393168] [2021-12-06 23:59:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:21,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:59:21,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:59:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:59:21,104 INFO L87 Difference]: Start difference. First operand 668683 states and 984182 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:00:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:05,243 INFO L93 Difference]: Finished difference Result 1978471 states and 2904988 transitions. [2021-12-07 00:00:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:00:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-07 00:00:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:07,722 INFO L225 Difference]: With dead ends: 1978471 [2021-12-07 00:00:07,722 INFO L226 Difference]: Without dead ends: 1310165 [2021-12-07 00:00:08,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:00:08,325 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 124 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:08,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 454 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:00:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310165 states. [2021-12-07 00:00:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310165 to 1310163. [2021-12-07 00:00:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310163 states, 1310162 states have (on average 1.4568534272860914) internal successors, (1908714), 1310162 states have internal predecessors, (1908714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310163 states to 1310163 states and 1908714 transitions. [2021-12-07 00:01:02,531 INFO L78 Accepts]: Start accepts. Automaton has 1310163 states and 1908714 transitions. Word has length 107 [2021-12-07 00:01:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:01:02,531 INFO L470 AbstractCegarLoop]: Abstraction has 1310163 states and 1908714 transitions. [2021-12-07 00:01:02,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:01:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1310163 states and 1908714 transitions. [2021-12-07 00:01:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 00:01:02,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:01:02,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:02,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-07 00:01:02,537 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:01:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2084463389, now seen corresponding path program 1 times [2021-12-07 00:01:02,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:02,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005216520] [2021-12-07 00:01:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:02,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 00:01:02,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:02,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005216520] [2021-12-07 00:01:02,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005216520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:01:02,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:01:02,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:01:02,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894990189] [2021-12-07 00:01:02,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:01:02,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:01:02,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:01:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:01:02,566 INFO L87 Difference]: Start difference. First operand 1310163 states and 1908714 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:02:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:02:07,843 INFO L93 Difference]: Finished difference Result 3170941 states and 4623684 transitions. [2021-12-07 00:02:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:02:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-07 00:02:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:02:11,472 INFO L225 Difference]: With dead ends: 3170941 [2021-12-07 00:02:11,472 INFO L226 Difference]: Without dead ends: 1861765 [2021-12-07 00:02:12,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:02:12,181 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 97 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:02:12,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 409 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:02:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861765 states. [2021-12-07 00:03:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861765 to 1317459. [2021-12-07 00:03:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317459 states, 1317458 states have (on average 1.457080225707385) internal successors, (1919642), 1317458 states have internal predecessors, (1919642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317459 states to 1317459 states and 1919642 transitions. [2021-12-07 00:03:12,884 INFO L78 Accepts]: Start accepts. Automaton has 1317459 states and 1919642 transitions. Word has length 108 [2021-12-07 00:03:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:03:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 1317459 states and 1919642 transitions. [2021-12-07 00:03:12,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:03:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1317459 states and 1919642 transitions. [2021-12-07 00:03:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-07 00:03:12,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:03:12,889 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:03:12,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-07 00:03:12,889 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:03:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash -3973650, now seen corresponding path program 1 times [2021-12-07 00:03:12,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:12,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400975071] [2021-12-07 00:03:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:12,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:03:12,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400975071] [2021-12-07 00:03:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400975071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:03:12,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:03:12,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:03:12,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403382985] [2021-12-07 00:03:12,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:03:12,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:03:12,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:03:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:03:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:03:12,976 INFO L87 Difference]: Start difference. First operand 1317459 states and 1919642 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)