./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fcb8e130 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash 6037d9c0da39b47219c2a722405991c574e168b5c260e77abe20cfd9849699bc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-fcb8e13 [2021-11-22 23:08:59,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 23:08:59,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 23:08:59,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 23:08:59,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 23:08:59,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 23:08:59,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 23:08:59,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 23:08:59,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 23:08:59,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 23:08:59,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 23:08:59,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 23:08:59,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 23:08:59,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 23:08:59,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 23:08:59,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 23:08:59,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 23:08:59,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 23:08:59,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 23:08:59,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 23:08:59,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 23:08:59,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 23:08:59,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 23:08:59,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 23:08:59,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 23:08:59,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 23:08:59,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 23:08:59,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 23:08:59,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 23:08:59,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 23:08:59,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 23:08:59,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 23:08:59,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 23:08:59,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 23:08:59,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 23:08:59,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 23:08:59,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 23:08:59,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 23:08:59,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 23:08:59,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 23:08:59,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 23:08:59,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 23:08:59,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 23:08:59,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 23:08:59,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 23:08:59,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 23:08:59,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 23:08:59,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 23:08:59,271 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 23:08:59,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 23:08:59,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 23:08:59,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 23:08:59,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 23:08:59,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 23:08:59,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 23:08:59,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 23:08:59,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 23:08:59,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 23:08:59,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 23:08:59,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 23:08:59,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 23:08:59,274 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6037d9c0da39b47219c2a722405991c574e168b5c260e77abe20cfd9849699bc [2021-11-22 23:08:59,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 23:08:59,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 23:08:59,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 23:08:59,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 23:08:59,480 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 23:08:59,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i [2021-11-22 23:08:59,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07369b0/557796a4c0914631b753ccec5a2a33f2/FLAGd51ea8c57 [2021-11-22 23:09:00,125 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 23:09:00,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i [2021-11-22 23:09:00,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07369b0/557796a4c0914631b753ccec5a2a33f2/FLAGd51ea8c57 [2021-11-22 23:09:00,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b07369b0/557796a4c0914631b753ccec5a2a33f2 [2021-11-22 23:09:00,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 23:09:00,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 23:09:00,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 23:09:00,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 23:09:00,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 23:09:00,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:09:00" (1/1) ... [2021-11-22 23:09:00,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1009a276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:00, skipping insertion in model container [2021-11-22 23:09:00,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:09:00" (1/1) ... [2021-11-22 23:09:00,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 23:09:00,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 23:09:01,380 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i[158583,158596] [2021-11-22 23:09:01,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 23:09:01,857 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 23:09:01,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i[158583,158596] [2021-11-22 23:09:02,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 23:09:02,200 INFO L208 MainTranslator]: Completed translation [2021-11-22 23:09:02,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02 WrapperNode [2021-11-22 23:09:02,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 23:09:02,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 23:09:02,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 23:09:02,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 23:09:02,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:02,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:02,589 INFO L137 Inliner]: procedures = 220, calls = 1799, calls flagged for inlining = 438, calls inlined = 1195, statements flattened = 17796 [2021-11-22 23:09:02,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 23:09:02,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 23:09:02,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 23:09:02,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 23:09:02,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:02,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:02,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:02,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:03,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:03,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:03,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:03,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 23:09:03,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 23:09:03,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 23:09:03,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 23:09:03,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (1/1) ... [2021-11-22 23:09:03,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 23:09:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:09:03,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 23:09:03,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 23:09:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-22 23:09:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-22 23:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 23:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 23:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 23:09:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 23:09:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-22 23:09:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-22 23:09:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-22 23:09:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_open [2021-11-22 23:09:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_open [2021-11-22 23:09:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 23:09:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_close [2021-11-22 23:09:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_close [2021-11-22 23:09:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 23:09:03,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 23:09:03,943 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 23:09:03,945 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 23:09:09,677 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 23:09:09,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 23:09:09,692 INFO L301 CfgBuilder]: Removed 102 assume(true) statements. [2021-11-22 23:09:09,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:09:09 BoogieIcfgContainer [2021-11-22 23:09:09,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 23:09:09,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 23:09:09,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 23:09:09,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 23:09:09,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:09:00" (1/3) ... [2021-11-22 23:09:09,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b773bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:09:09, skipping insertion in model container [2021-11-22 23:09:09,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:09:02" (2/3) ... [2021-11-22 23:09:09,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b773bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:09:09, skipping insertion in model container [2021-11-22 23:09:09,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:09:09" (3/3) ... [2021-11-22 23:09:09,702 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i [2021-11-22 23:09:09,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 23:09:09,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 23:09:09,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 23:09:09,765 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 23:09:09,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 23:09:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 3121 states, 3108 states have (on average 1.4623552123552124) internal successors, (4545), 3109 states have internal predecessors, (4545), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-22 23:09:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 23:09:09,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:09,832 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] [2021-11-22 23:09:09,833 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash -288760153, now seen corresponding path program 1 times [2021-11-22 23:09:09,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:09,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623956404] [2021-11-22 23:09:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:09,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:10,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623956404] [2021-11-22 23:09:10,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623956404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:10,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:10,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 23:09:10,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968939946] [2021-11-22 23:09:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:10,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:09:10,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:09:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:09:10,283 INFO L87 Difference]: Start difference. First operand has 3121 states, 3108 states have (on average 1.4623552123552124) internal successors, (4545), 3109 states have internal predecessors, (4545), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:11,228 INFO L93 Difference]: Finished difference Result 9335 states and 13671 transitions. [2021-11-22 23:09:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:09:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-22 23:09:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:11,261 INFO L225 Difference]: With dead ends: 9335 [2021-11-22 23:09:11,261 INFO L226 Difference]: Without dead ends: 6193 [2021-11-22 23:09:11,274 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 [2021-11-22 23:09:11,276 INFO L933 BasicCegarLoop]: 4075 mSDtfsCounter, 4202 mSDsluCounter, 12142 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 16217 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:11,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 16217 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 23:09:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6193 states. [2021-11-22 23:09:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6193 to 6045. [2021-11-22 23:09:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 6022 states have (on average 1.3787778146795084) internal successors, (8303), 6022 states have internal predecessors, (8303), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 8343 transitions. [2021-11-22 23:09:11,438 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 8343 transitions. Word has length 26 [2021-11-22 23:09:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:11,438 INFO L470 AbstractCegarLoop]: Abstraction has 6045 states and 8343 transitions. [2021-11-22 23:09:11,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 8343 transitions. [2021-11-22 23:09:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 23:09:11,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:11,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:11,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 23:09:11,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1257211104, now seen corresponding path program 1 times [2021-11-22 23:09:11,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001933741] [2021-11-22 23:09:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:11,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:11,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001933741] [2021-11-22 23:09:11,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001933741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:11,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:11,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:09:11,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974407229] [2021-11-22 23:09:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:11,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:09:11,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:09:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:09:11,574 INFO L87 Difference]: Start difference. First operand 6045 states and 8343 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) [2021-11-22 23:09:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:12,301 INFO L93 Difference]: Finished difference Result 23684 states and 32877 transitions. [2021-11-22 23:09:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:09:12,302 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 [2021-11-22 23:09:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:12,360 INFO L225 Difference]: With dead ends: 23684 [2021-11-22 23:09:12,361 INFO L226 Difference]: Without dead ends: 17658 [2021-11-22 23:09:12,374 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 [2021-11-22 23:09:12,376 INFO L933 BasicCegarLoop]: 6517 mSDtfsCounter, 8967 mSDsluCounter, 10615 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8971 SdHoareTripleChecker+Valid, 17132 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:12,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8971 Valid, 17132 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 23:09:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2021-11-22 23:09:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 6129. [2021-11-22 23:09:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6129 states, 6106 states have (on average 1.3735669832951196) internal successors, (8387), 6106 states have internal predecessors, (8387), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 8427 transitions. [2021-11-22 23:09:12,592 INFO L78 Accepts]: Start accepts. Automaton has 6129 states and 8427 transitions. Word has length 69 [2021-11-22 23:09:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:12,592 INFO L470 AbstractCegarLoop]: Abstraction has 6129 states and 8427 transitions. [2021-11-22 23:09:12,592 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) [2021-11-22 23:09:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 6129 states and 8427 transitions. [2021-11-22 23:09:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 23:09:12,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:12,601 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:12,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 23:09:12,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1362848918, now seen corresponding path program 1 times [2021-11-22 23:09:12,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:12,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889504891] [2021-11-22 23:09:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:12,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:12,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889504891] [2021-11-22 23:09:12,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889504891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:12,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:12,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:09:12,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688071843] [2021-11-22 23:09:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:12,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:09:12,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:09:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:09:12,762 INFO L87 Difference]: Start difference. First operand 6129 states and 8427 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:13,370 INFO L93 Difference]: Finished difference Result 23809 states and 32883 transitions. [2021-11-22 23:09:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:09:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-22 23:09:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:13,421 INFO L225 Difference]: With dead ends: 23809 [2021-11-22 23:09:13,421 INFO L226 Difference]: Without dead ends: 17699 [2021-11-22 23:09:13,438 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 [2021-11-22 23:09:13,441 INFO L933 BasicCegarLoop]: 7486 mSDtfsCounter, 10610 mSDsluCounter, 13978 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10614 SdHoareTripleChecker+Valid, 21464 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:13,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10614 Valid, 21464 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:09:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17699 states. [2021-11-22 23:09:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17699 to 6145. [2021-11-22 23:09:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6145 states, 6122 states have (on average 1.3725906566481543) internal successors, (8403), 6122 states have internal predecessors, (8403), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6145 states to 6145 states and 8443 transitions. [2021-11-22 23:09:13,722 INFO L78 Accepts]: Start accepts. Automaton has 6145 states and 8443 transitions. Word has length 72 [2021-11-22 23:09:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:13,724 INFO L470 AbstractCegarLoop]: Abstraction has 6145 states and 8443 transitions. [2021-11-22 23:09:13,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6145 states and 8443 transitions. [2021-11-22 23:09:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 23:09:13,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:13,731 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:13,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 23:09:13,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1252205832, now seen corresponding path program 1 times [2021-11-22 23:09:13,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:13,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522519192] [2021-11-22 23:09:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:13,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:13,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522519192] [2021-11-22 23:09:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522519192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:13,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46311773] [2021-11-22 23:09:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:13,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:13,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:13,872 INFO L87 Difference]: Start difference. First operand 6145 states and 8443 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:14,073 INFO L93 Difference]: Finished difference Result 12301 states and 16904 transitions. [2021-11-22 23:09:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 23:09:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:14,091 INFO L225 Difference]: With dead ends: 12301 [2021-11-22 23:09:14,092 INFO L226 Difference]: Without dead ends: 6175 [2021-11-22 23:09:14,107 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 [2021-11-22 23:09:14,109 INFO L933 BasicCegarLoop]: 4277 mSDtfsCounter, 10 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8544 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:14,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 8544 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:09:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6175 states. [2021-11-22 23:09:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6175 to 6155. [2021-11-22 23:09:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6155 states, 6132 states have (on average 1.371983039791259) internal successors, (8413), 6132 states have internal predecessors, (8413), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6155 states to 6155 states and 8453 transitions. [2021-11-22 23:09:14,289 INFO L78 Accepts]: Start accepts. Automaton has 6155 states and 8453 transitions. Word has length 74 [2021-11-22 23:09:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:14,290 INFO L470 AbstractCegarLoop]: Abstraction has 6155 states and 8453 transitions. [2021-11-22 23:09:14,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6155 states and 8453 transitions. [2021-11-22 23:09:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 23:09:14,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:14,300 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:14,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 23:09:14,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -676295031, now seen corresponding path program 1 times [2021-11-22 23:09:14,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988578184] [2021-11-22 23:09:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:14,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:14,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:14,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988578184] [2021-11-22 23:09:14,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988578184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:09:14,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844740096] [2021-11-22 23:09:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:14,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:09:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:09:14,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:09:14,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 23:09:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:15,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 23:09:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:09:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 23:09:15,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:09:15,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844740096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:15,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 23:09:15,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 23:09:15,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875638397] [2021-11-22 23:09:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:15,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:15,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:09:15,209 INFO L87 Difference]: Start difference. First operand 6155 states and 8453 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:15,596 INFO L93 Difference]: Finished difference Result 17015 states and 23419 transitions. [2021-11-22 23:09:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 23:09:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:15,628 INFO L225 Difference]: With dead ends: 17015 [2021-11-22 23:09:15,628 INFO L226 Difference]: Without dead ends: 10879 [2021-11-22 23:09:15,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:09:15,649 INFO L933 BasicCegarLoop]: 7584 mSDtfsCounter, 3284 mSDsluCounter, 4274 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3286 SdHoareTripleChecker+Valid, 11858 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:15,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3286 Valid, 11858 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:09:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10879 states. [2021-11-22 23:09:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10879 to 6163. [2021-11-22 23:09:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6140 states have (on average 1.371498371335505) internal successors, (8421), 6140 states have internal predecessors, (8421), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 8461 transitions. [2021-11-22 23:09:15,857 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 8461 transitions. Word has length 77 [2021-11-22 23:09:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:15,857 INFO L470 AbstractCegarLoop]: Abstraction has 6163 states and 8461 transitions. [2021-11-22 23:09:15,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 8461 transitions. [2021-11-22 23:09:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 23:09:15,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:15,866 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:15,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 23:09:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:09:16,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 153367633, now seen corresponding path program 1 times [2021-11-22 23:09:16,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428263046] [2021-11-22 23:09:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:16,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:16,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:16,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428263046] [2021-11-22 23:09:16,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428263046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:16,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:16,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:16,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049747260] [2021-11-22 23:09:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:16,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:16,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:16,205 INFO L87 Difference]: Start difference. First operand 6163 states and 8461 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:16,520 INFO L93 Difference]: Finished difference Result 16441 states and 22605 transitions. [2021-11-22 23:09:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 23:09:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:16,544 INFO L225 Difference]: With dead ends: 16441 [2021-11-22 23:09:16,545 INFO L226 Difference]: Without dead ends: 10297 [2021-11-22 23:09:16,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:16,559 INFO L933 BasicCegarLoop]: 6584 mSDtfsCounter, 3206 mSDsluCounter, 3894 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3208 SdHoareTripleChecker+Valid, 10478 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:16,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3208 Valid, 10478 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:09:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10297 states. [2021-11-22 23:09:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10297 to 6413. [2021-11-22 23:09:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6413 states, 6390 states have (on average 1.3702660406885758) internal successors, (8756), 6390 states have internal predecessors, (8756), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 8796 transitions. [2021-11-22 23:09:16,729 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 8796 transitions. Word has length 80 [2021-11-22 23:09:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 6413 states and 8796 transitions. [2021-11-22 23:09:16,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 8796 transitions. [2021-11-22 23:09:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 23:09:16,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:16,742 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:16,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 23:09:16,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:16,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1029580777, now seen corresponding path program 1 times [2021-11-22 23:09:16,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:16,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628842578] [2021-11-22 23:09:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:16,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:16,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:16,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628842578] [2021-11-22 23:09:16,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628842578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:09:16,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279570971] [2021-11-22 23:09:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:16,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:09:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:09:16,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:09:16,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 23:09:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:09:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:09:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:17,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:09:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:17,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279570971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:09:17,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 23:09:17,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 23:09:17,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968984630] [2021-11-22 23:09:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 23:09:17,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 23:09:17,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 23:09:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:09:17,701 INFO L87 Difference]: Start difference. First operand 6413 states and 8796 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:17,937 INFO L93 Difference]: Finished difference Result 12897 states and 17690 transitions. [2021-11-22 23:09:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 23:09:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 23:09:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:17,954 INFO L225 Difference]: With dead ends: 12897 [2021-11-22 23:09:17,954 INFO L226 Difference]: Without dead ends: 6503 [2021-11-22 23:09:17,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:09:17,968 INFO L933 BasicCegarLoop]: 4277 mSDtfsCounter, 56 mSDsluCounter, 12801 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 17078 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:17,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 17078 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:09:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6503 states. [2021-11-22 23:09:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6503 to 6503. [2021-11-22 23:09:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 6480 states have (on average 1.3651234567901234) internal successors, (8846), 6480 states have internal predecessors, (8846), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 8886 transitions. [2021-11-22 23:09:18,154 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 8886 transitions. Word has length 81 [2021-11-22 23:09:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:18,155 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 8886 transitions. [2021-11-22 23:09:18,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 8886 transitions. [2021-11-22 23:09:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-22 23:09:18,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:18,163 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:18,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 23:09:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 23:09:18,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash -270678189, now seen corresponding path program 1 times [2021-11-22 23:09:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010356238] [2021-11-22 23:09:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:18,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 23:09:18,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010356238] [2021-11-22 23:09:18,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010356238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:18,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:18,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:18,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358242320] [2021-11-22 23:09:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:18,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:18,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:18,476 INFO L87 Difference]: Start difference. First operand 6503 states and 8886 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:18,810 INFO L93 Difference]: Finished difference Result 13037 states and 17830 transitions. [2021-11-22 23:09:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-22 23:09:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:18,827 INFO L225 Difference]: With dead ends: 13037 [2021-11-22 23:09:18,828 INFO L226 Difference]: Without dead ends: 6553 [2021-11-22 23:09:18,838 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 [2021-11-22 23:09:18,839 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 406 mSDsluCounter, 3847 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 8064 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:18,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 8064 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:09:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-11-22 23:09:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 6543. [2021-11-22 23:09:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6543 states, 6520 states have (on average 1.362883435582822) internal successors, (8886), 6520 states have internal predecessors, (8886), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6543 states to 6543 states and 8926 transitions. [2021-11-22 23:09:18,985 INFO L78 Accepts]: Start accepts. Automaton has 6543 states and 8926 transitions. Word has length 84 [2021-11-22 23:09:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 6543 states and 8926 transitions. [2021-11-22 23:09:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6543 states and 8926 transitions. [2021-11-22 23:09:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 23:09:18,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:18,995 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:18,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 23:09:18,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1723102159, now seen corresponding path program 1 times [2021-11-22 23:09:18,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:18,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862674916] [2021-11-22 23:09:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:18,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:19,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:19,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862674916] [2021-11-22 23:09:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862674916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:19,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:19,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801156856] [2021-11-22 23:09:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:19,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:19,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:19,121 INFO L87 Difference]: Start difference. First operand 6543 states and 8926 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:19,451 INFO L93 Difference]: Finished difference Result 17973 states and 24490 transitions. [2021-11-22 23:09:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 23:09:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:19,479 INFO L225 Difference]: With dead ends: 17973 [2021-11-22 23:09:19,480 INFO L226 Difference]: Without dead ends: 11449 [2021-11-22 23:09:19,493 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 [2021-11-22 23:09:19,494 INFO L933 BasicCegarLoop]: 6247 mSDtfsCounter, 3250 mSDsluCounter, 4105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3252 SdHoareTripleChecker+Valid, 10352 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:19,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3252 Valid, 10352 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:09:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11449 states. [2021-11-22 23:09:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11449 to 6549. [2021-11-22 23:09:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 6526 states have (on average 1.3625498007968126) internal successors, (8892), 6526 states have internal predecessors, (8892), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 8932 transitions. [2021-11-22 23:09:19,678 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 8932 transitions. Word has length 89 [2021-11-22 23:09:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 8932 transitions. [2021-11-22 23:09:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 8932 transitions. [2021-11-22 23:09:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 23:09:19,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:19,687 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:19,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 23:09:19,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1279201485, now seen corresponding path program 1 times [2021-11-22 23:09:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908012413] [2021-11-22 23:09:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:19,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:19,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:19,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908012413] [2021-11-22 23:09:19,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908012413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:19,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:19,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 23:09:19,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769750623] [2021-11-22 23:09:19,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:19,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:09:19,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:09:19,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:09:19,827 INFO L87 Difference]: Start difference. First operand 6549 states and 8932 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:24,204 INFO L93 Difference]: Finished difference Result 13613 states and 18604 transitions. [2021-11-22 23:09:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:09:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 23:09:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:24,220 INFO L225 Difference]: With dead ends: 13613 [2021-11-22 23:09:24,220 INFO L226 Difference]: Without dead ends: 7083 [2021-11-22 23:09:24,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 23:09:24,232 INFO L933 BasicCegarLoop]: 4190 mSDtfsCounter, 393 mSDsluCounter, 10958 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 15148 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:24,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 15148 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-22 23:09:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-11-22 23:09:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 6627. [2021-11-22 23:09:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6604 states have (on average 1.3637189582071472) internal successors, (9006), 6604 states have internal predecessors, (9006), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9046 transitions. [2021-11-22 23:09:24,397 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9046 transitions. Word has length 89 [2021-11-22 23:09:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:24,397 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 9046 transitions. [2021-11-22 23:09:24,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9046 transitions. [2021-11-22 23:09:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-22 23:09:24,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:24,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-22 23:09:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 23:09:24,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1978089018, now seen corresponding path program 2 times [2021-11-22 23:09:24,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:24,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15345116] [2021-11-22 23:09:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:24,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 23:09:24,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15345116] [2021-11-22 23:09:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15345116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:24,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:24,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-22 23:09:24,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334372977] [2021-11-22 23:09:24,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:24,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 23:09:24,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 23:09:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-22 23:09:24,771 INFO L87 Difference]: Start difference. First operand 6627 states and 9046 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:31,410 INFO L93 Difference]: Finished difference Result 53112 states and 72993 transitions. [2021-11-22 23:09:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-22 23:09:31,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-22 23:09:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:31,492 INFO L225 Difference]: With dead ends: 53112 [2021-11-22 23:09:31,492 INFO L226 Difference]: Without dead ends: 46504 [2021-11-22 23:09:31,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=970, Invalid=3586, Unknown=0, NotChecked=0, Total=4556 [2021-11-22 23:09:31,520 INFO L933 BasicCegarLoop]: 17794 mSDtfsCounter, 40260 mSDsluCounter, 102739 mSDsCounter, 0 mSdLazyCounter, 6321 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40262 SdHoareTripleChecker+Valid, 120533 SdHoareTripleChecker+Invalid, 6678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 6321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:31,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40262 Valid, 120533 Invalid, 6678 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [357 Valid, 6321 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-22 23:09:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46504 states. [2021-11-22 23:09:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46504 to 6677. [2021-11-22 23:09:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6654 states have (on average 1.360985873159002) internal successors, (9056), 6654 states have internal predecessors, (9056), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 9096 transitions. [2021-11-22 23:09:32,185 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 9096 transitions. Word has length 90 [2021-11-22 23:09:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:32,185 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 9096 transitions. [2021-11-22 23:09:32,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 9096 transitions. [2021-11-22 23:09:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-22 23:09:32,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:32,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-22 23:09:32,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 23:09:32,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1374707337, now seen corresponding path program 1 times [2021-11-22 23:09:32,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:32,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504326048] [2021-11-22 23:09:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:32,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 23:09:32,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504326048] [2021-11-22 23:09:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504326048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:09:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458768199] [2021-11-22 23:09:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:32,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:09:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:09:32,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:09:32,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 23:09:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:09:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:09:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 23:09:33,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:09:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-22 23:09:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458768199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:09:33,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 23:09:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 23:09:33,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963310194] [2021-11-22 23:09:33,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 23:09:33,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 23:09:33,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 23:09:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:09:33,157 INFO L87 Difference]: Start difference. First operand 6677 states and 9096 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:34,777 INFO L93 Difference]: Finished difference Result 33545 states and 45929 transitions. [2021-11-22 23:09:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 23:09:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 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 91 [2021-11-22 23:09:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:34,826 INFO L225 Difference]: With dead ends: 33545 [2021-11-22 23:09:34,826 INFO L226 Difference]: Without dead ends: 26887 [2021-11-22 23:09:34,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:09:34,847 INFO L933 BasicCegarLoop]: 6635 mSDtfsCounter, 29765 mSDsluCounter, 13864 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29773 SdHoareTripleChecker+Valid, 20499 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:34,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29773 Valid, 20499 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:09:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26887 states. [2021-11-22 23:09:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26887 to 8649. [2021-11-22 23:09:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8649 states, 8626 states have (on average 1.3434964062137724) internal successors, (11589), 8626 states have internal predecessors, (11589), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8649 states to 8649 states and 11629 transitions. [2021-11-22 23:09:35,337 INFO L78 Accepts]: Start accepts. Automaton has 8649 states and 11629 transitions. Word has length 91 [2021-11-22 23:09:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:35,337 INFO L470 AbstractCegarLoop]: Abstraction has 8649 states and 11629 transitions. [2021-11-22 23:09:35,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 8649 states and 11629 transitions. [2021-11-22 23:09:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-22 23:09:35,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:35,350 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:35,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 23:09:35,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:09:35,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash -490993475, now seen corresponding path program 1 times [2021-11-22 23:09:35,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822944988] [2021-11-22 23:09:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:35,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:35,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822944988] [2021-11-22 23:09:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822944988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:35,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:35,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:35,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939838676] [2021-11-22 23:09:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:35,633 INFO L87 Difference]: Start difference. First operand 8649 states and 11629 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:36,345 INFO L93 Difference]: Finished difference Result 22447 states and 30253 transitions. [2021-11-22 23:09:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-22 23:09:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:36,370 INFO L225 Difference]: With dead ends: 22447 [2021-11-22 23:09:36,370 INFO L226 Difference]: Without dead ends: 13817 [2021-11-22 23:09:36,387 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 [2021-11-22 23:09:36,388 INFO L933 BasicCegarLoop]: 4291 mSDtfsCounter, 2667 mSDsluCounter, 4252 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 8543 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:36,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2667 Valid, 8543 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:09:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13817 states. [2021-11-22 23:09:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13817 to 13805. [2021-11-22 23:09:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13805 states, 13782 states have (on average 1.3490059497895805) internal successors, (18592), 13782 states have internal predecessors, (18592), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13805 states to 13805 states and 18632 transitions. [2021-11-22 23:09:37,182 INFO L78 Accepts]: Start accepts. Automaton has 13805 states and 18632 transitions. Word has length 93 [2021-11-22 23:09:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 13805 states and 18632 transitions. [2021-11-22 23:09:37,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 13805 states and 18632 transitions. [2021-11-22 23:09:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 23:09:37,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:37,196 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 23:09:37,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 23:09:37,197 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash -49986087, now seen corresponding path program 1 times [2021-11-22 23:09:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:37,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772483253] [2021-11-22 23:09:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:37,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:37,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772483253] [2021-11-22 23:09:37,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772483253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:37,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:37,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:09:37,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510091512] [2021-11-22 23:09:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:37,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:09:37,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:09:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:09:37,295 INFO L87 Difference]: Start difference. First operand 13805 states and 18632 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-22 23:09:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:39,303 INFO L93 Difference]: Finished difference Result 48123 states and 64472 transitions. [2021-11-22 23:09:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:09:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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 94 [2021-11-22 23:09:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:39,367 INFO L225 Difference]: With dead ends: 48123 [2021-11-22 23:09:39,367 INFO L226 Difference]: Without dead ends: 34337 [2021-11-22 23:09:39,394 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 [2021-11-22 23:09:39,395 INFO L933 BasicCegarLoop]: 7474 mSDtfsCounter, 7144 mSDsluCounter, 11707 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7146 SdHoareTripleChecker+Valid, 19181 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:39,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7146 Valid, 19181 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:09:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34337 states. [2021-11-22 23:09:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34337 to 13853. [2021-11-22 23:09:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13853 states, 13830 states have (on average 1.3477946493130875) internal successors, (18640), 13830 states have internal predecessors, (18640), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13853 states to 13853 states and 18680 transitions. [2021-11-22 23:09:40,342 INFO L78 Accepts]: Start accepts. Automaton has 13853 states and 18680 transitions. Word has length 94 [2021-11-22 23:09:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:40,342 INFO L470 AbstractCegarLoop]: Abstraction has 13853 states and 18680 transitions. [2021-11-22 23:09:40,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-22 23:09:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 13853 states and 18680 transitions. [2021-11-22 23:09:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 23:09:40,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:40,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:40,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 23:09:40,357 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1698192125, now seen corresponding path program 1 times [2021-11-22 23:09:40,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:40,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721746300] [2021-11-22 23:09:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:40,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:40,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721746300] [2021-11-22 23:09:40,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721746300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:40,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:40,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:40,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246502406] [2021-11-22 23:09:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:40,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:40,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:40,461 INFO L87 Difference]: Start difference. First operand 13853 states and 18680 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:41,320 INFO L93 Difference]: Finished difference Result 27711 states and 37386 transitions. [2021-11-22 23:09:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-22 23:09:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:41,346 INFO L225 Difference]: With dead ends: 27711 [2021-11-22 23:09:41,346 INFO L226 Difference]: Without dead ends: 13877 [2021-11-22 23:09:41,365 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 [2021-11-22 23:09:41,365 INFO L933 BasicCegarLoop]: 4286 mSDtfsCounter, 0 mSDsluCounter, 4262 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8548 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:41,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8548 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:09:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13877 states. [2021-11-22 23:09:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13877 to 13877. [2021-11-22 23:09:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 13854 states have (on average 1.3471921466724412) internal successors, (18664), 13854 states have internal predecessors, (18664), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 18704 transitions. [2021-11-22 23:09:42,199 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 18704 transitions. Word has length 98 [2021-11-22 23:09:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 18704 transitions. [2021-11-22 23:09:42,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 18704 transitions. [2021-11-22 23:09:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 23:09:42,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:42,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:42,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 23:09:42,212 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1752585023, now seen corresponding path program 1 times [2021-11-22 23:09:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:42,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123132119] [2021-11-22 23:09:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:42,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123132119] [2021-11-22 23:09:42,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123132119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:42,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:42,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:09:42,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730822475] [2021-11-22 23:09:42,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:42,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:09:42,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:42,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:09:42,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:09:42,297 INFO L87 Difference]: Start difference. First operand 13877 states and 18704 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:43,111 INFO L93 Difference]: Finished difference Result 27759 states and 37434 transitions. [2021-11-22 23:09:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:09:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-22 23:09:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:43,133 INFO L225 Difference]: With dead ends: 27759 [2021-11-22 23:09:43,133 INFO L226 Difference]: Without dead ends: 13901 [2021-11-22 23:09:43,148 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 [2021-11-22 23:09:43,149 INFO L933 BasicCegarLoop]: 4289 mSDtfsCounter, 0 mSDsluCounter, 4262 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8551 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:43,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8551 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:09:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-11-22 23:09:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 13901. [2021-11-22 23:09:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13901 states, 13878 states have (on average 1.346591727914685) internal successors, (18688), 13878 states have internal predecessors, (18688), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13901 states to 13901 states and 18728 transitions. [2021-11-22 23:09:44,023 INFO L78 Accepts]: Start accepts. Automaton has 13901 states and 18728 transitions. Word has length 98 [2021-11-22 23:09:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:44,023 INFO L470 AbstractCegarLoop]: Abstraction has 13901 states and 18728 transitions. [2021-11-22 23:09:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13901 states and 18728 transitions. [2021-11-22 23:09:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 23:09:44,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:44,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:44,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 23:09:44,034 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2105673405, now seen corresponding path program 1 times [2021-11-22 23:09:44,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717582234] [2021-11-22 23:09:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:44,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:44,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:44,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717582234] [2021-11-22 23:09:44,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717582234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:44,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:44,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 23:09:44,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834218315] [2021-11-22 23:09:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:44,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 23:09:44,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 23:09:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 23:09:44,151 INFO L87 Difference]: Start difference. First operand 13901 states and 18728 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:48,156 INFO L93 Difference]: Finished difference Result 72555 states and 97156 transitions. [2021-11-22 23:09:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 23:09:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-22 23:09:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:48,273 INFO L225 Difference]: With dead ends: 72555 [2021-11-22 23:09:48,273 INFO L226 Difference]: Without dead ends: 58673 [2021-11-22 23:09:48,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 23:09:48,311 INFO L933 BasicCegarLoop]: 11177 mSDtfsCounter, 11362 mSDsluCounter, 34756 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11366 SdHoareTripleChecker+Valid, 45933 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:48,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11366 Valid, 45933 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 23:09:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58673 states. [2021-11-22 23:09:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58673 to 14273. [2021-11-22 23:09:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14250 states have (on average 1.3501754385964913) internal successors, (19240), 14250 states have internal predecessors, (19240), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 19280 transitions. [2021-11-22 23:09:49,543 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 19280 transitions. Word has length 98 [2021-11-22 23:09:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:49,543 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 19280 transitions. [2021-11-22 23:09:49,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 19280 transitions. [2021-11-22 23:09:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 23:09:49,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:49,555 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:49,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 23:09:49,555 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -678213245, now seen corresponding path program 1 times [2021-11-22 23:09:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818305409] [2021-11-22 23:09:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:49,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:49,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818305409] [2021-11-22 23:09:49,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818305409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:49,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:49,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 23:09:49,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23692346] [2021-11-22 23:09:49,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:49,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 23:09:49,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 23:09:49,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-22 23:09:49,700 INFO L87 Difference]: Start difference. First operand 14273 states and 19280 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:09:57,475 INFO L93 Difference]: Finished difference Result 91122 states and 124257 transitions. [2021-11-22 23:09:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 23:09:57,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-22 23:09:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:09:57,640 INFO L225 Difference]: With dead ends: 91122 [2021-11-22 23:09:57,640 INFO L226 Difference]: Without dead ends: 76868 [2021-11-22 23:09:57,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 23:09:57,683 INFO L933 BasicCegarLoop]: 15794 mSDtfsCounter, 33249 mSDsluCounter, 60891 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33251 SdHoareTripleChecker+Valid, 76685 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 23:09:57,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33251 Valid, 76685 Invalid, 2809 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [288 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 23:09:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76868 states. [2021-11-22 23:09:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76868 to 14345. [2021-11-22 23:09:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14322 states have (on average 1.3484150258343808) internal successors, (19312), 14322 states have internal predecessors, (19312), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:09:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 19352 transitions. [2021-11-22 23:09:59,173 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 19352 transitions. Word has length 98 [2021-11-22 23:09:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:09:59,174 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 19352 transitions. [2021-11-22 23:09:59,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:09:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 19352 transitions. [2021-11-22 23:09:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-22 23:09:59,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:09:59,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:09:59,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 23:09:59,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:09:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:09:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2007389474, now seen corresponding path program 1 times [2021-11-22 23:09:59,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:09:59,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593996666] [2021-11-22 23:09:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:09:59,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:09:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:09:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:09:59,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:09:59,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593996666] [2021-11-22 23:09:59,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593996666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:09:59,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:09:59,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:09:59,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199737116] [2021-11-22 23:09:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:09:59,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:09:59,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:09:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:09:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:09:59,293 INFO L87 Difference]: Start difference. First operand 14345 states and 19352 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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) [2021-11-22 23:10:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:02,242 INFO L93 Difference]: Finished difference Result 48291 states and 64724 transitions. [2021-11-22 23:10:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:10:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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 100 [2021-11-22 23:10:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:02,307 INFO L225 Difference]: With dead ends: 48291 [2021-11-22 23:10:02,307 INFO L226 Difference]: Without dead ends: 33965 [2021-11-22 23:10:02,338 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 [2021-11-22 23:10:02,339 INFO L933 BasicCegarLoop]: 8904 mSDtfsCounter, 4678 mSDsluCounter, 11198 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4680 SdHoareTripleChecker+Valid, 20102 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:02,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4680 Valid, 20102 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:10:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33965 states. [2021-11-22 23:10:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33965 to 14369. [2021-11-22 23:10:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14369 states, 14346 states have (on average 1.3478321483340303) internal successors, (19336), 14346 states have internal predecessors, (19336), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14369 states to 14369 states and 19376 transitions. [2021-11-22 23:10:03,823 INFO L78 Accepts]: Start accepts. Automaton has 14369 states and 19376 transitions. Word has length 100 [2021-11-22 23:10:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:03,824 INFO L470 AbstractCegarLoop]: Abstraction has 14369 states and 19376 transitions. [2021-11-22 23:10:03,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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) [2021-11-22 23:10:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 14369 states and 19376 transitions. [2021-11-22 23:10:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-22 23:10:03,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:03,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:03,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 23:10:03,835 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1211452224, now seen corresponding path program 1 times [2021-11-22 23:10:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302020891] [2021-11-22 23:10:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:03,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:03,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:03,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302020891] [2021-11-22 23:10:03,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302020891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:03,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:03,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:10:03,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188382527] [2021-11-22 23:10:03,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:03,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:10:03,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:10:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:10:03,917 INFO L87 Difference]: Start difference. First operand 14369 states and 19376 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) [2021-11-22 23:10:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:06,061 INFO L93 Difference]: Finished difference Result 38029 states and 51346 transitions. [2021-11-22 23:10:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:10:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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 100 [2021-11-22 23:10:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:06,107 INFO L225 Difference]: With dead ends: 38029 [2021-11-22 23:10:06,107 INFO L226 Difference]: Without dead ends: 23679 [2021-11-22 23:10:06,130 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 [2021-11-22 23:10:06,130 INFO L933 BasicCegarLoop]: 6963 mSDtfsCounter, 3309 mSDsluCounter, 3650 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3311 SdHoareTripleChecker+Valid, 10613 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:06,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3311 Valid, 10613 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:10:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23679 states. [2021-11-22 23:10:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23679 to 14369. [2021-11-22 23:10:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14369 states, 14346 states have (on average 1.3428133277568661) internal successors, (19264), 14346 states have internal predecessors, (19264), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14369 states to 14369 states and 19304 transitions. [2021-11-22 23:10:07,327 INFO L78 Accepts]: Start accepts. Automaton has 14369 states and 19304 transitions. Word has length 100 [2021-11-22 23:10:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:07,327 INFO L470 AbstractCegarLoop]: Abstraction has 14369 states and 19304 transitions. [2021-11-22 23:10:07,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 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) [2021-11-22 23:10:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14369 states and 19304 transitions. [2021-11-22 23:10:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 23:10:07,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:07,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:07,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 23:10:07,339 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash -569381885, now seen corresponding path program 1 times [2021-11-22 23:10:07,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:07,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009599478] [2021-11-22 23:10:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:07,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:07,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:07,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009599478] [2021-11-22 23:10:07,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009599478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:07,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:07,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 23:10:07,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672195047] [2021-11-22 23:10:07,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:07,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 23:10:07,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 23:10:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:10:07,469 INFO L87 Difference]: Start difference. First operand 14369 states and 19304 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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) [2021-11-22 23:10:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:14,865 INFO L93 Difference]: Finished difference Result 68985 states and 92832 transitions. [2021-11-22 23:10:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 23:10:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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 101 [2021-11-22 23:10:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:14,974 INFO L225 Difference]: With dead ends: 68985 [2021-11-22 23:10:14,974 INFO L226 Difference]: Without dead ends: 54635 [2021-11-22 23:10:15,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-22 23:10:15,017 INFO L933 BasicCegarLoop]: 9898 mSDtfsCounter, 17069 mSDsluCounter, 39268 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17071 SdHoareTripleChecker+Valid, 49166 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:15,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17071 Valid, 49166 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-22 23:10:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54635 states. [2021-11-22 23:10:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54635 to 14405. [2021-11-22 23:10:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14405 states, 14382 states have (on average 1.3419552218050341) internal successors, (19300), 14382 states have internal predecessors, (19300), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14405 states to 14405 states and 19340 transitions. [2021-11-22 23:10:16,683 INFO L78 Accepts]: Start accepts. Automaton has 14405 states and 19340 transitions. Word has length 101 [2021-11-22 23:10:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:16,683 INFO L470 AbstractCegarLoop]: Abstraction has 14405 states and 19340 transitions. [2021-11-22 23:10:16,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 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) [2021-11-22 23:10:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14405 states and 19340 transitions. [2021-11-22 23:10:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 23:10:16,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:16,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 23:10:16,693 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash 629239300, now seen corresponding path program 1 times [2021-11-22 23:10:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599150461] [2021-11-22 23:10:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:16,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:16,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599150461] [2021-11-22 23:10:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599150461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:16,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:16,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:10:16,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225294339] [2021-11-22 23:10:16,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:16,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:10:16,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:10:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:10:16,779 INFO L87 Difference]: Start difference. First operand 14405 states and 19340 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) [2021-11-22 23:10:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:19,487 INFO L93 Difference]: Finished difference Result 32466 states and 43718 transitions. [2021-11-22 23:10:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:10:19,489 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 101 [2021-11-22 23:10:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:19,534 INFO L225 Difference]: With dead ends: 32466 [2021-11-22 23:10:19,534 INFO L226 Difference]: Without dead ends: 25145 [2021-11-22 23:10:19,553 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 [2021-11-22 23:10:19,554 INFO L933 BasicCegarLoop]: 6817 mSDtfsCounter, 3094 mSDsluCounter, 4000 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3096 SdHoareTripleChecker+Valid, 10817 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:19,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3096 Valid, 10817 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:10:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25145 states. [2021-11-22 23:10:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25145 to 14513. [2021-11-22 23:10:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14513 states, 14490 states have (on average 1.3394064872325742) internal successors, (19408), 14490 states have internal predecessors, (19408), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14513 states to 14513 states and 19448 transitions. [2021-11-22 23:10:21,067 INFO L78 Accepts]: Start accepts. Automaton has 14513 states and 19448 transitions. Word has length 101 [2021-11-22 23:10:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:21,068 INFO L470 AbstractCegarLoop]: Abstraction has 14513 states and 19448 transitions. [2021-11-22 23:10:21,068 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) [2021-11-22 23:10:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14513 states and 19448 transitions. [2021-11-22 23:10:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-22 23:10:21,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:21,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:21,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 23:10:21,078 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1042190198, now seen corresponding path program 1 times [2021-11-22 23:10:21,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372556237] [2021-11-22 23:10:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:21,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:21,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372556237] [2021-11-22 23:10:21,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372556237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:21,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:21,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 23:10:21,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087427080] [2021-11-22 23:10:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:21,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 23:10:21,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 23:10:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-22 23:10:21,404 INFO L87 Difference]: Start difference. First operand 14513 states and 19448 transitions. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2021-11-22 23:10:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:42,156 INFO L93 Difference]: Finished difference Result 128282 states and 173341 transitions. [2021-11-22 23:10:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-22 23:10:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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 102 [2021-11-22 23:10:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:42,513 INFO L225 Difference]: With dead ends: 128282 [2021-11-22 23:10:42,513 INFO L226 Difference]: Without dead ends: 113788 [2021-11-22 23:10:42,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=2180, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 23:10:42,561 INFO L933 BasicCegarLoop]: 14039 mSDtfsCounter, 45584 mSDsluCounter, 93725 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45586 SdHoareTripleChecker+Valid, 107764 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:42,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45586 Valid, 107764 Invalid, 3786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [347 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 23:10:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113788 states. [2021-11-22 23:10:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113788 to 14705. [2021-11-22 23:10:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14705 states, 14682 states have (on average 1.3199836534532081) internal successors, (19380), 14682 states have internal predecessors, (19380), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14705 states to 14705 states and 19420 transitions. [2021-11-22 23:10:45,237 INFO L78 Accepts]: Start accepts. Automaton has 14705 states and 19420 transitions. Word has length 102 [2021-11-22 23:10:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:45,237 INFO L470 AbstractCegarLoop]: Abstraction has 14705 states and 19420 transitions. [2021-11-22 23:10:45,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 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) [2021-11-22 23:10:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 14705 states and 19420 transitions. [2021-11-22 23:10:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-22 23:10:45,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:45,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:45,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 23:10:45,248 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 91990746, now seen corresponding path program 1 times [2021-11-22 23:10:45,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58629300] [2021-11-22 23:10:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:45,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:45,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:45,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58629300] [2021-11-22 23:10:45,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58629300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:45,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:45,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 23:10:45,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153304705] [2021-11-22 23:10:45,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:45,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:10:45,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:45,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:10:45,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:10:45,345 INFO L87 Difference]: Start difference. First operand 14705 states and 19420 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2021-11-22 23:10:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:50,771 INFO L93 Difference]: Finished difference Result 44177 states and 58462 transitions. [2021-11-22 23:10:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 23:10:50,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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 102 [2021-11-22 23:10:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:50,824 INFO L225 Difference]: With dead ends: 44177 [2021-11-22 23:10:50,824 INFO L226 Difference]: Without dead ends: 29491 [2021-11-22 23:10:50,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 23:10:50,849 INFO L933 BasicCegarLoop]: 7204 mSDtfsCounter, 4484 mSDsluCounter, 18367 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4486 SdHoareTripleChecker+Valid, 25571 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:50,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4486 Valid, 25571 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 23:10:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29491 states. [2021-11-22 23:10:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29491 to 14741. [2021-11-22 23:10:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14741 states, 14718 states have (on average 1.3192009783938035) internal successors, (19416), 14718 states have internal predecessors, (19416), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:10:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14741 states to 14741 states and 19456 transitions. [2021-11-22 23:10:53,169 INFO L78 Accepts]: Start accepts. Automaton has 14741 states and 19456 transitions. Word has length 102 [2021-11-22 23:10:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:10:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 14741 states and 19456 transitions. [2021-11-22 23:10:53,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2021-11-22 23:10:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 14741 states and 19456 transitions. [2021-11-22 23:10:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-22 23:10:53,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:10:53,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:10:53,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 23:10:53,179 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:10:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:10:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 293814680, now seen corresponding path program 1 times [2021-11-22 23:10:53,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:10:53,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304139989] [2021-11-22 23:10:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:10:53,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:10:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:10:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:10:53,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:10:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304139989] [2021-11-22 23:10:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304139989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:10:53,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:10:53,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:10:53,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908905603] [2021-11-22 23:10:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:10:53,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:10:53,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:10:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:10:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:10:53,269 INFO L87 Difference]: Start difference. First operand 14741 states and 19456 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) [2021-11-22 23:10:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:10:59,213 INFO L93 Difference]: Finished difference Result 49215 states and 64492 transitions. [2021-11-22 23:10:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:10:59,213 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 102 [2021-11-22 23:10:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:10:59,271 INFO L225 Difference]: With dead ends: 49215 [2021-11-22 23:10:59,272 INFO L226 Difference]: Without dead ends: 34493 [2021-11-22 23:10:59,296 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 [2021-11-22 23:10:59,297 INFO L933 BasicCegarLoop]: 6877 mSDtfsCounter, 6527 mSDsluCounter, 11128 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6529 SdHoareTripleChecker+Valid, 18005 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:10:59,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6529 Valid, 18005 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:10:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34493 states. [2021-11-22 23:11:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34493 to 14765. [2021-11-22 23:11:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14765 states, 14742 states have (on average 1.3186813186813187) internal successors, (19440), 14742 states have internal predecessors, (19440), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:11:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14765 states to 14765 states and 19480 transitions. [2021-11-22 23:11:01,755 INFO L78 Accepts]: Start accepts. Automaton has 14765 states and 19480 transitions. Word has length 102 [2021-11-22 23:11:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:11:01,755 INFO L470 AbstractCegarLoop]: Abstraction has 14765 states and 19480 transitions. [2021-11-22 23:11:01,756 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) [2021-11-22 23:11:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14765 states and 19480 transitions. [2021-11-22 23:11:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-22 23:11:01,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:11:01,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:11:01,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 23:11:01,766 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:11:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:11:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1581789620, now seen corresponding path program 1 times [2021-11-22 23:11:01,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:11:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696709633] [2021-11-22 23:11:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:11:01,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:11:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:11:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:11:02,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:11:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696709633] [2021-11-22 23:11:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696709633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:11:02,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:11:02,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 23:11:02,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424179266] [2021-11-22 23:11:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:11:02,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 23:11:02,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:11:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 23:11:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-22 23:11:02,151 INFO L87 Difference]: Start difference. First operand 14765 states and 19480 transitions. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2021-11-22 23:11:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:11:30,752 INFO L93 Difference]: Finished difference Result 130238 states and 174761 transitions. [2021-11-22 23:11:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-22 23:11:30,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 [2021-11-22 23:11:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:11:30,989 INFO L225 Difference]: With dead ends: 130238 [2021-11-22 23:11:30,989 INFO L226 Difference]: Without dead ends: 115492 [2021-11-22 23:11:31,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=2180, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 23:11:31,031 INFO L933 BasicCegarLoop]: 12501 mSDtfsCounter, 45930 mSDsluCounter, 100871 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45932 SdHoareTripleChecker+Valid, 113372 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-22 23:11:31,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45932 Valid, 113372 Invalid, 3714 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [301 Valid, 3413 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-22 23:11:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115492 states. [2021-11-22 23:11:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115492 to 14861. [2021-11-22 23:11:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14861 states, 14838 states have (on average 1.317428224828144) internal successors, (19548), 14838 states have internal predecessors, (19548), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:11:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14861 states to 14861 states and 19588 transitions. [2021-11-22 23:11:34,354 INFO L78 Accepts]: Start accepts. Automaton has 14861 states and 19588 transitions. Word has length 103 [2021-11-22 23:11:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:11:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 14861 states and 19588 transitions. [2021-11-22 23:11:34,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2021-11-22 23:11:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14861 states and 19588 transitions. [2021-11-22 23:11:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-22 23:11:34,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:11:34,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:11:34,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 23:11:34,365 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:11:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:11:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 5348611, now seen corresponding path program 1 times [2021-11-22 23:11:34,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:11:34,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507095298] [2021-11-22 23:11:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:11:34,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:11:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:11:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:11:34,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:11:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507095298] [2021-11-22 23:11:34,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507095298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:11:34,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:11:34,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:11:34,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767066356] [2021-11-22 23:11:34,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:11:34,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:11:34,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:11:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:11:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:11:34,473 INFO L87 Difference]: Start difference. First operand 14861 states and 19588 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) [2021-11-22 23:11:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:11:39,340 INFO L93 Difference]: Finished difference Result 34216 states and 45063 transitions. [2021-11-22 23:11:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:11:39,340 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 103 [2021-11-22 23:11:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:11:39,370 INFO L225 Difference]: With dead ends: 34216 [2021-11-22 23:11:39,370 INFO L226 Difference]: Without dead ends: 19374 [2021-11-22 23:11:39,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:11:39,390 INFO L933 BasicCegarLoop]: 6660 mSDtfsCounter, 6801 mSDsluCounter, 7279 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6801 SdHoareTripleChecker+Valid, 13939 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 23:11:39,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6801 Valid, 13939 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 23:11:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19374 states. [2021-11-22 23:11:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19374 to 14699. [2021-11-22 23:11:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14699 states, 14676 states have (on average 1.3098937040065413) internal successors, (19224), 14676 states have internal predecessors, (19224), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (24), 16 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-22 23:11:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14699 states to 14699 states and 19264 transitions. [2021-11-22 23:11:42,080 INFO L78 Accepts]: Start accepts. Automaton has 14699 states and 19264 transitions. Word has length 103 [2021-11-22 23:11:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:11:42,080 INFO L470 AbstractCegarLoop]: Abstraction has 14699 states and 19264 transitions. [2021-11-22 23:11:42,080 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) [2021-11-22 23:11:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14699 states and 19264 transitions. [2021-11-22 23:11:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-22 23:11:42,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:11:42,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:11:42,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 23:11:42,091 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:11:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:11:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 72255053, now seen corresponding path program 1 times [2021-11-22 23:11:42,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:11:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445826303] [2021-11-22 23:11:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:11:42,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:11:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:11:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:11:42,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:11:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445826303] [2021-11-22 23:11:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445826303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:11:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930386966] [2021-11-22 23:11:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:11:42,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:11:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:11:42,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:11:42,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 23:11:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:11:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 23:11:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:11:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:11:43,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:11:43,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930386966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:11:43,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 23:11:43,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-22 23:11:43,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786715689] [2021-11-22 23:11:43,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:11:43,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:11:43,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:11:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:11:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:11:43,110 INFO L87 Difference]: Start difference. First operand 14699 states and 19264 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2021-11-22 23:11:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:11:51,601 INFO L93 Difference]: Finished difference Result 43949 states and 58118 transitions. [2021-11-22 23:11:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:11:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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 105 [2021-11-22 23:11:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:11:51,669 INFO L225 Difference]: With dead ends: 43949 [2021-11-22 23:11:51,669 INFO L226 Difference]: Without dead ends: 36400 [2021-11-22 23:11:51,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:11:51,690 INFO L933 BasicCegarLoop]: 8715 mSDtfsCounter, 13377 mSDsluCounter, 11687 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13377 SdHoareTripleChecker+Valid, 20402 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:11:51,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13377 Valid, 20402 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 23:11:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36400 states. [2021-11-22 23:11:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36400 to 29508. [2021-11-22 23:11:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29508 states, 29463 states have (on average 1.314224620710722) internal successors, (38721), 29463 states have internal predecessors, (38721), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:11:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 38857 transitions. [2021-11-22 23:11:57,094 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 38857 transitions. Word has length 105 [2021-11-22 23:11:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:11:57,094 INFO L470 AbstractCegarLoop]: Abstraction has 29508 states and 38857 transitions. [2021-11-22 23:11:57,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2021-11-22 23:11:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 38857 transitions. [2021-11-22 23:11:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-22 23:11:57,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:11:57,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:11:57,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 23:11:57,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 23:11:57,309 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:11:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:11:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 513477934, now seen corresponding path program 1 times [2021-11-22 23:11:57,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:11:57,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825336244] [2021-11-22 23:11:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:11:57,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:11:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:11:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:11:57,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:11:57,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825336244] [2021-11-22 23:11:57,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825336244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:11:57,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:11:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:11:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743832259] [2021-11-22 23:11:57,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:11:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:11:57,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:11:57,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:11:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:11:57,404 INFO L87 Difference]: Start difference. First operand 29508 states and 38857 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:12:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:12,338 INFO L93 Difference]: Finished difference Result 94573 states and 124876 transitions. [2021-11-22 23:12:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:12:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2021-11-22 23:12:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:12,485 INFO L225 Difference]: With dead ends: 94573 [2021-11-22 23:12:12,485 INFO L226 Difference]: Without dead ends: 72215 [2021-11-22 23:12:12,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:12:12,529 INFO L933 BasicCegarLoop]: 9617 mSDtfsCounter, 6159 mSDsluCounter, 13469 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6163 SdHoareTripleChecker+Valid, 23086 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:12,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6163 Valid, 23086 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 23:12:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72215 states. [2021-11-22 23:12:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72215 to 30156. [2021-11-22 23:12:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30156 states, 30111 states have (on average 1.3164292119159111) internal successors, (39639), 30111 states have internal predecessors, (39639), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:12:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30156 states to 30156 states and 39775 transitions. [2021-11-22 23:12:18,490 INFO L78 Accepts]: Start accepts. Automaton has 30156 states and 39775 transitions. Word has length 107 [2021-11-22 23:12:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:18,490 INFO L470 AbstractCegarLoop]: Abstraction has 30156 states and 39775 transitions. [2021-11-22 23:12:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:12:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 30156 states and 39775 transitions. [2021-11-22 23:12:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-22 23:12:18,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:18,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:12:18,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-22 23:12:18,502 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2046939125, now seen corresponding path program 1 times [2021-11-22 23:12:18,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642606766] [2021-11-22 23:12:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:18,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:12:18,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642606766] [2021-11-22 23:12:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642606766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:12:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958093178] [2021-11-22 23:12:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:18,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:12:18,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:12:18,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 23:12:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 23:12:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:12:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:12:19,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:12:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:12:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958093178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:12:19,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 23:12:19,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 23:12:19,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673692277] [2021-11-22 23:12:19,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 23:12:19,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 23:12:19,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:19,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 23:12:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:12:19,754 INFO L87 Difference]: Start difference. First operand 30156 states and 39775 transitions. Second operand has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:12:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:12:30,699 INFO L93 Difference]: Finished difference Result 85653 states and 112966 transitions. [2021-11-22 23:12:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 23:12:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 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 109 [2021-11-22 23:12:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:12:30,803 INFO L225 Difference]: With dead ends: 85653 [2021-11-22 23:12:30,803 INFO L226 Difference]: Without dead ends: 55516 [2021-11-22 23:12:30,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:12:30,845 INFO L933 BasicCegarLoop]: 6558 mSDtfsCounter, 11515 mSDsluCounter, 4825 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11517 SdHoareTripleChecker+Valid, 11383 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 23:12:30,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11517 Valid, 11383 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 23:12:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55516 states. [2021-11-22 23:12:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55516 to 38708. [2021-11-22 23:12:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38708 states, 38663 states have (on average 1.3010630318392262) internal successors, (50303), 38663 states have internal predecessors, (50303), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:12:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38708 states to 38708 states and 50439 transitions. [2021-11-22 23:12:38,039 INFO L78 Accepts]: Start accepts. Automaton has 38708 states and 50439 transitions. Word has length 109 [2021-11-22 23:12:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:12:38,039 INFO L470 AbstractCegarLoop]: Abstraction has 38708 states and 50439 transitions. [2021-11-22 23:12:38,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.571428571428573) internal successors, (207), 7 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:12:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 38708 states and 50439 transitions. [2021-11-22 23:12:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-22 23:12:38,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:12:38,058 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:12:38,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 23:12:38,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:12:38,260 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:12:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:12:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1369759821, now seen corresponding path program 1 times [2021-11-22 23:12:38,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:12:38,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874868689] [2021-11-22 23:12:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:12:38,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:12:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:12:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-22 23:12:38,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:12:38,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874868689] [2021-11-22 23:12:38,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874868689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:12:38,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:12:38,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 23:12:38,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107709940] [2021-11-22 23:12:38,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:12:38,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 23:12:38,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:12:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 23:12:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-22 23:12:38,564 INFO L87 Difference]: Start difference. First operand 38708 states and 50439 transitions. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2021-11-22 23:13:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:13:09,805 INFO L93 Difference]: Finished difference Result 163034 states and 218311 transitions. [2021-11-22 23:13:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 23:13:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 115 [2021-11-22 23:13:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:13:10,130 INFO L225 Difference]: With dead ends: 163034 [2021-11-22 23:13:10,130 INFO L226 Difference]: Without dead ends: 124345 [2021-11-22 23:13:10,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 23:13:10,195 INFO L933 BasicCegarLoop]: 9629 mSDtfsCounter, 38033 mSDsluCounter, 50407 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38033 SdHoareTripleChecker+Valid, 60036 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 23:13:10,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38033 Valid, 60036 Invalid, 2171 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [249 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 23:13:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124345 states. [2021-11-22 23:13:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124345 to 33794. [2021-11-22 23:13:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33794 states, 33749 states have (on average 1.3075646685827729) internal successors, (44129), 33749 states have internal predecessors, (44129), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:13:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33794 states to 33794 states and 44265 transitions. [2021-11-22 23:13:18,081 INFO L78 Accepts]: Start accepts. Automaton has 33794 states and 44265 transitions. Word has length 115 [2021-11-22 23:13:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:13:18,082 INFO L470 AbstractCegarLoop]: Abstraction has 33794 states and 44265 transitions. [2021-11-22 23:13:18,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2021-11-22 23:13:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 33794 states and 44265 transitions. [2021-11-22 23:13:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-22 23:13:18,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:13:18,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:13:18,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-22 23:13:18,095 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:13:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:13:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -997433847, now seen corresponding path program 1 times [2021-11-22 23:13:18,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:13:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377146752] [2021-11-22 23:13:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:13:18,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:13:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:13:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:13:18,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:13:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377146752] [2021-11-22 23:13:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377146752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:13:18,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:13:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:13:18,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939975398] [2021-11-22 23:13:18,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:13:18,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:13:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:13:18,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:13:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:13:18,156 INFO L87 Difference]: Start difference. First operand 33794 states and 44265 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:13:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:13:29,102 INFO L93 Difference]: Finished difference Result 80656 states and 105713 transitions. [2021-11-22 23:13:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:13:29,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-22 23:13:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:13:29,177 INFO L225 Difference]: With dead ends: 80656 [2021-11-22 23:13:29,177 INFO L226 Difference]: Without dead ends: 46881 [2021-11-22 23:13:29,216 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 [2021-11-22 23:13:29,217 INFO L933 BasicCegarLoop]: 6904 mSDtfsCounter, 2668 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2668 SdHoareTripleChecker+Valid, 11118 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:13:29,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2668 Valid, 11118 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:13:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46881 states. [2021-11-22 23:13:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46881 to 46869. [2021-11-22 23:13:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46869 states, 46824 states have (on average 1.3091149837690073) internal successors, (61298), 46824 states have internal predecessors, (61298), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:13:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46869 states to 46869 states and 61434 transitions. [2021-11-22 23:13:39,727 INFO L78 Accepts]: Start accepts. Automaton has 46869 states and 61434 transitions. Word has length 117 [2021-11-22 23:13:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:13:39,727 INFO L470 AbstractCegarLoop]: Abstraction has 46869 states and 61434 transitions. [2021-11-22 23:13:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:13:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46869 states and 61434 transitions. [2021-11-22 23:13:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-22 23:13:39,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:13:39,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:13:39,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-22 23:13:39,746 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:13:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:13:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 258517883, now seen corresponding path program 1 times [2021-11-22 23:13:39,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:13:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612457670] [2021-11-22 23:13:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:13:39,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:13:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:13:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:13:39,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:13:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612457670] [2021-11-22 23:13:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612457670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:13:39,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:13:39,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:13:39,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230558852] [2021-11-22 23:13:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:13:39,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:13:39,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:13:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:13:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:13:39,838 INFO L87 Difference]: Start difference. First operand 46869 states and 61434 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:13:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:13:50,713 INFO L93 Difference]: Finished difference Result 93827 states and 122954 transitions. [2021-11-22 23:13:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:13:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 127 [2021-11-22 23:13:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:13:50,791 INFO L225 Difference]: With dead ends: 93827 [2021-11-22 23:13:50,791 INFO L226 Difference]: Without dead ends: 46977 [2021-11-22 23:13:50,839 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 [2021-11-22 23:13:50,839 INFO L933 BasicCegarLoop]: 4223 mSDtfsCounter, 0 mSDsluCounter, 4160 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8383 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:13:50,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8383 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:13:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46977 states. [2021-11-22 23:14:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46977 to 46869. [2021-11-22 23:14:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46869 states, 46824 states have (on average 1.3021954553220572) internal successors, (60974), 46824 states have internal predecessors, (60974), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:14:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46869 states to 46869 states and 61110 transitions. [2021-11-22 23:14:01,465 INFO L78 Accepts]: Start accepts. Automaton has 46869 states and 61110 transitions. Word has length 127 [2021-11-22 23:14:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:14:01,465 INFO L470 AbstractCegarLoop]: Abstraction has 46869 states and 61110 transitions. [2021-11-22 23:14:01,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:14:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 46869 states and 61110 transitions. [2021-11-22 23:14:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-22 23:14:01,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:14:01,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:14:01,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-22 23:14:01,484 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:14:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:14:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 588025814, now seen corresponding path program 1 times [2021-11-22 23:14:01,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:14:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368724521] [2021-11-22 23:14:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:14:01,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:14:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:14:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 23:14:01,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:14:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368724521] [2021-11-22 23:14:01,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368724521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:14:01,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:14:01,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:14:01,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458178087] [2021-11-22 23:14:01,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:14:01,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:14:01,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:14:01,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:14:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:14:01,660 INFO L87 Difference]: Start difference. First operand 46869 states and 61110 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:14:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:14:12,265 INFO L93 Difference]: Finished difference Result 93755 states and 122270 transitions. [2021-11-22 23:14:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:14:12,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 129 [2021-11-22 23:14:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:14:12,343 INFO L225 Difference]: With dead ends: 93755 [2021-11-22 23:14:12,343 INFO L226 Difference]: Without dead ends: 46905 [2021-11-22 23:14:12,395 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 [2021-11-22 23:14:12,395 INFO L933 BasicCegarLoop]: 4238 mSDtfsCounter, 0 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8470 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:14:12,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8470 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:14:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46905 states. [2021-11-22 23:14:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46905 to 46905. [2021-11-22 23:14:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46905 states, 46860 states have (on average 1.3019632949210413) internal successors, (61010), 46860 states have internal predecessors, (61010), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:14:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46905 states to 46905 states and 61146 transitions. [2021-11-22 23:14:22,846 INFO L78 Accepts]: Start accepts. Automaton has 46905 states and 61146 transitions. Word has length 129 [2021-11-22 23:14:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:14:22,846 INFO L470 AbstractCegarLoop]: Abstraction has 46905 states and 61146 transitions. [2021-11-22 23:14:22,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:14:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46905 states and 61146 transitions. [2021-11-22 23:14:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-22 23:14:22,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:14:22,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:14:22,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-22 23:14:22,867 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:14:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:14:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2112400182, now seen corresponding path program 1 times [2021-11-22 23:14:22,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:14:22,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848965574] [2021-11-22 23:14:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:14:22,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:14:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:14:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:14:23,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:14:23,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848965574] [2021-11-22 23:14:23,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848965574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:14:23,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105595810] [2021-11-22 23:14:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:14:23,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:14:23,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:14:23,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:14:23,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 23:14:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:14:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 23:14:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:14:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-11-22 23:14:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 23:14:23,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 23:14:23,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105595810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:14:23,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 23:14:23,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-11-22 23:14:23,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307205312] [2021-11-22 23:14:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:14:23,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 23:14:23,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:14:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 23:14:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 23:14:23,958 INFO L87 Difference]: Start difference. First operand 46905 states and 61146 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:15:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:15:01,550 INFO L93 Difference]: Finished difference Result 196367 states and 254768 transitions. [2021-11-22 23:15:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 23:15:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-22 23:15:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:15:01,857 INFO L225 Difference]: With dead ends: 196367 [2021-11-22 23:15:01,857 INFO L226 Difference]: Without dead ends: 149481 [2021-11-22 23:15:02,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 23:15:02,142 INFO L933 BasicCegarLoop]: 9382 mSDtfsCounter, 10542 mSDsluCounter, 19125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10544 SdHoareTripleChecker+Valid, 28507 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 23:15:02,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10544 Valid, 28507 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 23:15:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149481 states. [2021-11-22 23:15:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149481 to 46905. [2021-11-22 23:15:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46905 states, 46860 states have (on average 1.301195049082373) internal successors, (60974), 46860 states have internal predecessors, (60974), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:15:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46905 states to 46905 states and 61110 transitions. [2021-11-22 23:15:13,462 INFO L78 Accepts]: Start accepts. Automaton has 46905 states and 61110 transitions. Word has length 130 [2021-11-22 23:15:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:15:13,463 INFO L470 AbstractCegarLoop]: Abstraction has 46905 states and 61110 transitions. [2021-11-22 23:15:13,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:15:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46905 states and 61110 transitions. [2021-11-22 23:15:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-22 23:15:13,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:15:13,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:15:13,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 23:15:13,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:15:13,684 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:15:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:15:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1635338272, now seen corresponding path program 1 times [2021-11-22 23:15:13,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:15:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507442195] [2021-11-22 23:15:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:15:13,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:15:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:15:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 23:15:13,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:15:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507442195] [2021-11-22 23:15:13,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507442195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 23:15:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168760740] [2021-11-22 23:15:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:15:13,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:15:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-22 23:15:13,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 23:15:13,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 23:15:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:15:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2917 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 23:15:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 23:15:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 23:15:14,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 23:15:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 23:15:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168760740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 23:15:15,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 23:15:15,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 23:15:15,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286766828] [2021-11-22 23:15:15,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 23:15:15,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 23:15:15,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:15:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 23:15:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 23:15:15,072 INFO L87 Difference]: Start difference. First operand 46905 states and 61110 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:15:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:15:38,103 INFO L93 Difference]: Finished difference Result 137964 states and 179663 transitions. [2021-11-22 23:15:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 23:15:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-22 23:15:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:15:38,288 INFO L225 Difference]: With dead ends: 137964 [2021-11-22 23:15:38,288 INFO L226 Difference]: Without dead ends: 91078 [2021-11-22 23:15:38,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-11-22 23:15:38,349 INFO L933 BasicCegarLoop]: 7533 mSDtfsCounter, 3300 mSDsluCounter, 19266 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3302 SdHoareTripleChecker+Valid, 26799 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:15:38,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3302 Valid, 26799 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:15:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91078 states. [2021-11-22 23:15:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91078 to 47013. [2021-11-22 23:15:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47013 states, 46968 states have (on average 1.3005024697666496) internal successors, (61082), 46968 states have internal predecessors, (61082), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:15:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47013 states to 47013 states and 61218 transitions. [2021-11-22 23:15:50,125 INFO L78 Accepts]: Start accepts. Automaton has 47013 states and 61218 transitions. Word has length 130 [2021-11-22 23:15:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:15:50,125 INFO L470 AbstractCegarLoop]: Abstraction has 47013 states and 61218 transitions. [2021-11-22 23:15:50,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:15:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 47013 states and 61218 transitions. [2021-11-22 23:15:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-22 23:15:50,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:15:50,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:15:50,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 23:15:50,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 23:15:50,358 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:15:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:15:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1119457178, now seen corresponding path program 1 times [2021-11-22 23:15:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:15:50,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818948808] [2021-11-22 23:15:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:15:50,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:15:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:15:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:15:50,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:15:50,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818948808] [2021-11-22 23:15:50,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818948808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:15:50,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:15:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:15:50,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157085355] [2021-11-22 23:15:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:15:50,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:15:50,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:15:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:15:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:15:50,464 INFO L87 Difference]: Start difference. First operand 47013 states and 61218 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:16:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:16:13,353 INFO L93 Difference]: Finished difference Result 131934 states and 171689 transitions. [2021-11-22 23:16:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:16:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 132 [2021-11-22 23:16:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:16:13,501 INFO L225 Difference]: With dead ends: 131934 [2021-11-22 23:16:13,501 INFO L226 Difference]: Without dead ends: 84940 [2021-11-22 23:16:13,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 23:16:13,556 INFO L933 BasicCegarLoop]: 6841 mSDtfsCounter, 3239 mSDsluCounter, 10436 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3241 SdHoareTripleChecker+Valid, 17277 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:16:13,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3241 Valid, 17277 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:16:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84940 states. [2021-11-22 23:16:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84940 to 47157. [2021-11-22 23:16:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47157 states, 47112 states have (on average 1.2995839701137715) internal successors, (61226), 47112 states have internal predecessors, (61226), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:16:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47157 states to 47157 states and 61362 transitions. [2021-11-22 23:16:25,746 INFO L78 Accepts]: Start accepts. Automaton has 47157 states and 61362 transitions. Word has length 132 [2021-11-22 23:16:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:16:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 47157 states and 61362 transitions. [2021-11-22 23:16:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:16:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 47157 states and 61362 transitions. [2021-11-22 23:16:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-22 23:16:25,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:16:25,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:16:25,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-22 23:16:25,768 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:16:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:16:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1047070620, now seen corresponding path program 1 times [2021-11-22 23:16:25,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:16:25,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281733506] [2021-11-22 23:16:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:16:25,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:16:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:16:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:16:25,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:16:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281733506] [2021-11-22 23:16:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281733506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:16:25,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:16:25,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:16:25,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584792081] [2021-11-22 23:16:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:16:25,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:16:25,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:16:25,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:16:25,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:16:25,880 INFO L87 Difference]: Start difference. First operand 47157 states and 61362 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:16:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:16:58,149 INFO L93 Difference]: Finished difference Result 160492 states and 207761 transitions. [2021-11-22 23:16:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 23:16:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 132 [2021-11-22 23:16:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:16:58,389 INFO L225 Difference]: With dead ends: 160492 [2021-11-22 23:16:58,389 INFO L226 Difference]: Without dead ends: 113354 [2021-11-22 23:16:58,457 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 [2021-11-22 23:16:58,458 INFO L933 BasicCegarLoop]: 6882 mSDtfsCounter, 6533 mSDsluCounter, 11065 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6535 SdHoareTripleChecker+Valid, 17947 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 23:16:58,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6535 Valid, 17947 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 23:16:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113354 states. [2021-11-22 23:17:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113354 to 47157. [2021-11-22 23:17:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47157 states, 47112 states have (on average 1.2988198335880454) internal successors, (61190), 47112 states have internal predecessors, (61190), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (104), 32 states have call predecessors, (104), 32 states have call successors, (104) [2021-11-22 23:17:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47157 states to 47157 states and 61326 transitions. [2021-11-22 23:17:11,425 INFO L78 Accepts]: Start accepts. Automaton has 47157 states and 61326 transitions. Word has length 132 [2021-11-22 23:17:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:17:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 47157 states and 61326 transitions. [2021-11-22 23:17:11,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:17:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 47157 states and 61326 transitions. [2021-11-22 23:17:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-22 23:17:11,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:17:11,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:17:11,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-22 23:17:11,448 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:17:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:17:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1069702874, now seen corresponding path program 1 times [2021-11-22 23:17:11,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:17:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978942898] [2021-11-22 23:17:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:17:11,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:17:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:17:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 23:17:12,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:17:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978942898] [2021-11-22 23:17:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978942898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:17:12,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:17:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-22 23:17:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143586260] [2021-11-22 23:17:12,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:17:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 23:17:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:17:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 23:17:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-11-22 23:17:12,589 INFO L87 Difference]: Start difference. First operand 47157 states and 61326 transitions. Second operand has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 20 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:17:24,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:27,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:29,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:31,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:33,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:35,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:38,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:40,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:42,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:17:45,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:18:34,256 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:18:44,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:18:46,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:16,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:23,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:27,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:29,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:31,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:34,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:36,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:38,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:41,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:43,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:47,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:49,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:52,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:55,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:57,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:19:59,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:02,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:04,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:07,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:09,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:12,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:15,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:17,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:19,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:22,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:24,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:26,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:28,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:31,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:33,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:36,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:20:38,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 23:21:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:21:21,718 INFO L93 Difference]: Finished difference Result 186347 states and 245708 transitions. [2021-11-22 23:21:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-22 23:21:21,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 20 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-22 23:21:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:21:22,029 INFO L225 Difference]: With dead ends: 186347 [2021-11-22 23:21:22,030 INFO L226 Difference]: Without dead ends: 139209 [2021-11-22 23:21:22,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=764, Invalid=3658, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 23:21:22,124 INFO L933 BasicCegarLoop]: 10776 mSDtfsCounter, 39070 mSDsluCounter, 157301 mSDsCounter, 0 mSdLazyCounter, 33819 mSolverCounterSat, 1234 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39070 SdHoareTripleChecker+Valid, 168077 SdHoareTripleChecker+Invalid, 35094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1234 IncrementalHoareTripleChecker+Valid, 33819 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:21:22,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39070 Valid, 168077 Invalid, 35094 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1234 Valid, 33819 Invalid, 41 Unknown, 0 Unchecked, 199.0s Time] [2021-11-22 23:21:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139209 states. [2021-11-22 23:21:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139209 to 54453. [2021-11-22 23:21:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54453 states, 54376 states have (on average 1.3042886567603353) internal successors, (70922), 54392 states have internal predecessors, (70922), 60 states have call successors, (60), 24 states have call predecessors, (60), 16 states have return successors, (207), 36 states have call predecessors, (207), 60 states have call successors, (207) [2021-11-22 23:21:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54453 states to 54453 states and 71189 transitions. [2021-11-22 23:21:37,726 INFO L78 Accepts]: Start accepts. Automaton has 54453 states and 71189 transitions. Word has length 132 [2021-11-22 23:21:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:21:37,726 INFO L470 AbstractCegarLoop]: Abstraction has 54453 states and 71189 transitions. [2021-11-22 23:21:37,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.285714285714286) internal successors, (132), 20 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:21:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 54453 states and 71189 transitions. [2021-11-22 23:21:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 23:21:37,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:21:37,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:21:37,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-22 23:21:37,756 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:21:37,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:21:37,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1483213491, now seen corresponding path program 1 times [2021-11-22 23:21:37,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:21:37,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329452014] [2021-11-22 23:21:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:21:37,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:21:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:21:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 23:21:37,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:21:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329452014] [2021-11-22 23:21:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329452014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:21:37,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:21:37,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 23:21:37,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7150397] [2021-11-22 23:21:37,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:21:37,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 23:21:37,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:21:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 23:21:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 23:21:37,829 INFO L87 Difference]: Start difference. First operand 54453 states and 71189 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:21:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 23:21:55,959 INFO L93 Difference]: Finished difference Result 121005 states and 158149 transitions. [2021-11-22 23:21:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 23:21:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-22 23:21:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 23:21:56,103 INFO L225 Difference]: With dead ends: 121005 [2021-11-22 23:21:56,103 INFO L226 Difference]: Without dead ends: 66571 [2021-11-22 23:21:56,170 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 [2021-11-22 23:21:56,171 INFO L933 BasicCegarLoop]: 6991 mSDtfsCounter, 3539 mSDsluCounter, 4208 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 11199 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 23:21:56,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3539 Valid, 11199 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 23:21:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66571 states. [2021-11-22 23:22:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66571 to 66559. [2021-11-22 23:22:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66559 states, 66453 states have (on average 1.3031766812634493) internal successors, (86600), 66462 states have internal predecessors, (86600), 77 states have call successors, (77), 36 states have call predecessors, (77), 28 states have return successors, (263), 60 states have call predecessors, (263), 77 states have call successors, (263) [2021-11-22 23:22:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66559 states to 66559 states and 86940 transitions. [2021-11-22 23:22:13,930 INFO L78 Accepts]: Start accepts. Automaton has 66559 states and 86940 transitions. Word has length 133 [2021-11-22 23:22:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 23:22:13,930 INFO L470 AbstractCegarLoop]: Abstraction has 66559 states and 86940 transitions. [2021-11-22 23:22:13,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 23:22:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 66559 states and 86940 transitions. [2021-11-22 23:22:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 23:22:13,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 23:22:13,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 23:22:13,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-22 23:22:13,961 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 23:22:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 23:22:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -253242359, now seen corresponding path program 1 times [2021-11-22 23:22:13,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 23:22:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147395248] [2021-11-22 23:22:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 23:22:13,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 23:22:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 23:22:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 23:22:14,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 23:22:14,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147395248] [2021-11-22 23:22:14,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147395248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 23:22:14,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 23:22:14,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 23:22:14,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621034624] [2021-11-22 23:22:14,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 23:22:14,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 23:22:14,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 23:22:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 23:22:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 23:22:14,364 INFO L87 Difference]: Start difference. First operand 66559 states and 86940 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15