./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 4d014703 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-wip.dd.seqcomp-4d01470 [2021-11-02 18:14:13,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 18:14:13,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 18:14:13,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 18:14:13,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 18:14:13,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 18:14:13,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 18:14:13,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 18:14:13,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 18:14:13,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 18:14:13,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 18:14:13,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 18:14:13,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 18:14:13,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 18:14:13,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 18:14:13,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 18:14:13,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 18:14:13,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 18:14:13,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 18:14:13,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 18:14:13,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 18:14:13,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 18:14:13,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 18:14:13,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 18:14:13,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 18:14:13,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 18:14:13,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 18:14:13,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 18:14:13,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 18:14:13,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 18:14:13,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 18:14:13,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 18:14:13,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 18:14:13,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 18:14:13,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 18:14:13,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 18:14:13,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 18:14:13,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 18:14:13,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 18:14:13,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 18:14:13,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 18:14:13,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 18:14:13,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 18:14:13,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 18:14:13,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 18:14:13,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 18:14:13,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 18:14:13,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 18:14:13,249 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 18:14:13,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 18:14:13,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 18:14:13,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 18:14:13,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 18:14:13,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 18:14:13,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 18:14:13,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 18:14:13,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:14:13,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 18:14:13,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 18:14:13,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 18:14:13,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 18:14:13,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6037d9c0da39b47219c2a722405991c574e168b5c260e77abe20cfd9849699bc [2021-11-02 18:14:13,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 18:14:13,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 18:14:13,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 18:14:13,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 18:14:13,448 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 18:14:13,449 INFO L432 ainManager$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 [2021-11-02 18:14:13,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a67488ba/b2af082ca100447dbfd7cd79228ce719/FLAGebbd4186d [2021-11-02 18:14:14,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 18:14:14,087 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 [2021-11-02 18:14:14,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a67488ba/b2af082ca100447dbfd7cd79228ce719/FLAGebbd4186d [2021-11-02 18:14:14,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a67488ba/b2af082ca100447dbfd7cd79228ce719 [2021-11-02 18:14:14,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 18:14:14,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 18:14:14,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 18:14:14,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 18:14:14,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 18:14:14,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:14:14" (1/1) ... [2021-11-02 18:14:14,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6b324c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:14, skipping insertion in model container [2021-11-02 18:14:14,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:14:14" (1/1) ... [2021-11-02 18:14:14,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 18:14:14,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 18:14:15,301 WARN L228 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] [2021-11-02 18:14:15,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:14:15,926 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 18:14:16,009 WARN L228 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] [2021-11-02 18:14:16,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:14:16,292 INFO L208 MainTranslator]: Completed translation [2021-11-02 18:14:16,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16 WrapperNode [2021-11-02 18:14:16,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 18:14:16,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 18:14:16,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 18:14:16,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 18:14:16,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:16,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:16,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 18:14:16,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 18:14:16,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 18:14:16,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 18:14:16,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:16,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:16,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:16,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:17,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:17,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:17,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:17,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 18:14:17,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 18:14:17,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 18:14:17,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 18:14:17,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (1/1) ... [2021-11-02 18:14:17,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:14:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:14:17,201 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) [2021-11-02 18:14:17,224 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 [2021-11-02 18:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 18:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 18:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 18:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 18:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 18:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 18:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 18:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 18:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-02 18:14:17,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-02 18:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_open [2021-11-02 18:14:17,254 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_open [2021-11-02 18:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 18:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_close [2021-11-02 18:14:17,255 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_close [2021-11-02 18:14:17,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 18:14:17,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 18:14:24,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 18:14:24,536 INFO L299 CfgBuilder]: Removed 2489 assume(true) statements. [2021-11-02 18:14:24,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:14:24 BoogieIcfgContainer [2021-11-02 18:14:24,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 18:14:24,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 18:14:24,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 18:14:24,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 18:14:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 06:14:14" (1/3) ... [2021-11-02 18:14:24,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db76f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:14:24, skipping insertion in model container [2021-11-02 18:14:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:14:16" (2/3) ... [2021-11-02 18:14:24,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db76f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:14:24, skipping insertion in model container [2021-11-02 18:14:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:14:24" (3/3) ... [2021-11-02 18:14:24,547 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 [2021-11-02 18:14:24,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 18:14:24,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 18:14:24,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 18:14:24,602 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 18:14:24,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 18:14:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 2940 states, 2927 states have (on average 1.490946361462248) internal successors, (4364), 2928 states have internal predecessors, (4364), 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) [2021-11-02 18:14:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 18:14:24,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:14:24,654 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] [2021-11-02 18:14:24,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:14:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:14:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1824939026, now seen corresponding path program 1 times [2021-11-02 18:14:24,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:14:24,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000339904] [2021-11-02 18:14:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:14:24,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:14:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:14:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:14:25,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:14:25,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000339904] [2021-11-02 18:14:25,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000339904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:14:25,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:14:25,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:14:25,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082258557] [2021-11-02 18:14:25,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:14:25,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:14:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:14:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:14:25,290 INFO L87 Difference]: Start difference. First operand has 2940 states, 2927 states have (on average 1.490946361462248) internal successors, (4364), 2928 states have internal predecessors, (4364), 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 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:14:27,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:15:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:15:03,863 INFO L93 Difference]: Finished difference Result 8754 states and 13070 transitions. [2021-11-02 18:15:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:15:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-02 18:15:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:15:03,904 INFO L225 Difference]: With dead ends: 8754 [2021-11-02 18:15:03,905 INFO L226 Difference]: Without dead ends: 5807 [2021-11-02 18:15:03,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.93ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:15:03,925 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4047 mSDsluCounter, 4110 mSDsCounter, 0 mSdLazyCounter, 8201 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34844.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37559.47ms IncrementalHoareTripleChecker+Time [2021-11-02 18:15:03,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4047 Valid, 48 Invalid, 8205 Unknown, 0 Unchecked, 84.85ms Time], IncrementalHoareTripleChecker [3 Valid, 8201 Invalid, 1 Unknown, 0 Unchecked, 37559.47ms Time] [2021-11-02 18:15:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2021-11-02 18:15:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5807. [2021-11-02 18:15:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5784 states have (on average 1.4043914246196403) internal successors, (8123), 5784 states have internal predecessors, (8123), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-02 18:15:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 8155 transitions. [2021-11-02 18:15:04,132 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 8155 transitions. Word has length 23 [2021-11-02 18:15:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:15:04,133 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 8155 transitions. [2021-11-02 18:15:04,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:15:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 8155 transitions. [2021-11-02 18:15:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 18:15:04,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:15:04,140 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] [2021-11-02 18:15:04,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 18:15:04,140 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:15:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:15:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash 666202280, now seen corresponding path program 1 times [2021-11-02 18:15:04,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:15:04,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109325397] [2021-11-02 18:15:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:15:04,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:15:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:15:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:15:04,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:15:04,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109325397] [2021-11-02 18:15:04,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109325397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:15:04,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:15:04,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:15:04,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63631888] [2021-11-02 18:15:04,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:15:04,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:15:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:15:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:15:04,477 INFO L87 Difference]: Start difference. First operand 5807 states and 8155 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:15:06,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:16:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:16:12,892 INFO L93 Difference]: Finished difference Result 17383 states and 24454 transitions. [2021-11-02 18:16:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:16:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-02 18:16:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:16:12,942 INFO L225 Difference]: With dead ends: 17383 [2021-11-02 18:16:12,943 INFO L226 Difference]: Without dead ends: 11586 [2021-11-02 18:16:12,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.18ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:16:12,956 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 3985 mSDsluCounter, 11584 mSDsCounter, 0 mSdLazyCounter, 16480 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63304.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3985 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 16509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 154.67ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 16480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67141.83ms IncrementalHoareTripleChecker+Time [2021-11-02 18:16:12,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3985 Valid, 99 Invalid, 16509 Unknown, 0 Unchecked, 154.67ms Time], IncrementalHoareTripleChecker [28 Valid, 16480 Invalid, 1 Unknown, 0 Unchecked, 67141.83ms Time] [2021-11-02 18:16:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-11-02 18:16:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 11290. [2021-11-02 18:16:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11245 states have (on average 1.4038239217429969) internal successors, (15786), 11245 states have internal predecessors, (15786), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:16:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 15866 transitions. [2021-11-02 18:16:13,191 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 15866 transitions. Word has length 25 [2021-11-02 18:16:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:16:13,191 INFO L470 AbstractCegarLoop]: Abstraction has 11290 states and 15866 transitions. [2021-11-02 18:16:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:16:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 15866 transitions. [2021-11-02 18:16:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 18:16:13,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:16:13,203 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] [2021-11-02 18:16:13,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 18:16:13,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:16:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:16:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash 555830267, now seen corresponding path program 1 times [2021-11-02 18:16:13,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:16:13,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620108171] [2021-11-02 18:16:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:16:13,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:16:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:16:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:16:13,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:16:13,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620108171] [2021-11-02 18:16:13,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620108171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:16:13,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:16:13,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:16:13,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612465509] [2021-11-02 18:16:13,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:16:13,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:16:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:16:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:16:13,516 INFO L87 Difference]: Start difference. First operand 11290 states and 15866 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:16:15,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:17:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:17:34,857 INFO L93 Difference]: Finished difference Result 44194 states and 62512 transitions. [2021-11-02 18:17:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:17:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 18:17:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:17:34,975 INFO L225 Difference]: With dead ends: 44194 [2021-11-02 18:17:34,976 INFO L226 Difference]: Without dead ends: 32922 [2021-11-02 18:17:35,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.73ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:17:35,026 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 8577 mSDsluCounter, 10134 mSDsCounter, 0 mSdLazyCounter, 16581 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75150.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 149.79ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 16581 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79781.51ms IncrementalHoareTripleChecker+Time [2021-11-02 18:17:35,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 64 Invalid, 16678 Unknown, 0 Unchecked, 149.79ms Time], IncrementalHoareTripleChecker [96 Valid, 16581 Invalid, 1 Unknown, 0 Unchecked, 79781.51ms Time] [2021-11-02 18:17:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32922 states. [2021-11-02 18:17:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32922 to 11458. [2021-11-02 18:17:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11413 states have (on average 1.3978796109699465) internal successors, (15954), 11413 states have internal predecessors, (15954), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:17:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16034 transitions. [2021-11-02 18:17:35,478 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16034 transitions. Word has length 66 [2021-11-02 18:17:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:17:35,478 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 16034 transitions. [2021-11-02 18:17:35,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:17:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16034 transitions. [2021-11-02 18:17:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 18:17:35,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:17:35,488 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] [2021-11-02 18:17:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 18:17:35,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:17:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:17:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -196678620, now seen corresponding path program 1 times [2021-11-02 18:17:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:17:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276610947] [2021-11-02 18:17:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:17:35,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:17:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:17:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:17:35,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:17:35,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276610947] [2021-11-02 18:17:35,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276610947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:17:35,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:17:35,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:17:35,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078983354] [2021-11-02 18:17:35,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:17:35,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:17:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:17:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:17:35,761 INFO L87 Difference]: Start difference. First operand 11458 states and 16034 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:17:37,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:18:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:18:14,332 INFO L93 Difference]: Finished difference Result 22958 states and 32127 transitions. [2021-11-02 18:18:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:18:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 18:18:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:18:14,359 INFO L225 Difference]: With dead ends: 22958 [2021-11-02 18:18:14,359 INFO L226 Difference]: Without dead ends: 11518 [2021-11-02 18:18:14,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.77ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:18:14,379 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 4086 mSDsCounter, 0 mSdLazyCounter, 8185 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35841.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 8194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.65ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 8185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38010.41ms IncrementalHoareTripleChecker+Time [2021-11-02 18:18:14,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 8194 Unknown, 0 Unchecked, 46.65ms Time], IncrementalHoareTripleChecker [8 Valid, 8185 Invalid, 1 Unknown, 0 Unchecked, 38010.41ms Time] [2021-11-02 18:18:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11518 states. [2021-11-02 18:18:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11518 to 11478. [2021-11-02 18:18:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11478 states, 11433 states have (on average 1.3971835913583486) internal successors, (15974), 11433 states have internal predecessors, (15974), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:18:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11478 states to 11478 states and 16054 transitions. [2021-11-02 18:18:14,576 INFO L78 Accepts]: Start accepts. Automaton has 11478 states and 16054 transitions. Word has length 69 [2021-11-02 18:18:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:18:14,578 INFO L470 AbstractCegarLoop]: Abstraction has 11478 states and 16054 transitions. [2021-11-02 18:18:14,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:18:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 11478 states and 16054 transitions. [2021-11-02 18:18:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 18:18:14,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:18:14,589 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] [2021-11-02 18:18:14,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 18:18:14,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:18:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:18:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 660079663, now seen corresponding path program 1 times [2021-11-02 18:18:14,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:18:14,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254539399] [2021-11-02 18:18:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:18:14,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:18:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:18:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:18:14,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:18:14,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254539399] [2021-11-02 18:18:14,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254539399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:18:14,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:18:14,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:18:14,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081230032] [2021-11-02 18:18:14,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:18:14,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:18:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:18:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:18:14,807 INFO L87 Difference]: Start difference. First operand 11478 states and 16054 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) [2021-11-02 18:18:16,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:18:21,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:19:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:19:51,438 INFO L93 Difference]: Finished difference Result 44898 states and 62958 transitions. [2021-11-02 18:19:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:19:51,443 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 [2021-11-02 18:19:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:19:51,526 INFO L225 Difference]: With dead ends: 44898 [2021-11-02 18:19:51,527 INFO L226 Difference]: Without dead ends: 33438 [2021-11-02 18:19:51,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.66ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:19:51,567 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10268 mSDsluCounter, 13470 mSDsCounter, 0 mSdLazyCounter, 20672 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89854.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10272 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 20691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 148.51ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20672 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94874.81ms IncrementalHoareTripleChecker+Time [2021-11-02 18:19:51,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10272 Valid, 64 Invalid, 20691 Unknown, 0 Unchecked, 148.51ms Time], IncrementalHoareTripleChecker [18 Valid, 20672 Invalid, 1 Unknown, 0 Unchecked, 94874.81ms Time] [2021-11-02 18:19:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33438 states. [2021-11-02 18:19:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33438 to 11510. [2021-11-02 18:19:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11465 states have (on average 1.3960750109027475) internal successors, (16006), 11465 states have internal predecessors, (16006), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:19:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 16086 transitions. [2021-11-02 18:19:51,937 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 16086 transitions. Word has length 69 [2021-11-02 18:19:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:19:51,939 INFO L470 AbstractCegarLoop]: Abstraction has 11510 states and 16086 transitions. [2021-11-02 18:19:51,939 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) [2021-11-02 18:19:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 16086 transitions. [2021-11-02 18:19:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 18:19:51,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:19:51,955 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] [2021-11-02 18:19:51,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 18:19:51,956 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:19:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:19:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash -436548035, now seen corresponding path program 1 times [2021-11-02 18:19:51,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:19:51,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606256848] [2021-11-02 18:19:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:19:51,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:19:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:19:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:19:52,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:19:52,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606256848] [2021-11-02 18:19:52,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606256848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:19:52,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733239841] [2021-11-02 18:19:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:19:52,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:19:52,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:19:52,303 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) [2021-11-02 18:19:52,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 18:19:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:19:53,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:19:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:19:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 18:19:53,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 18:19:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733239841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:19:53,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 18:19:53,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 18:19:53,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510551038] [2021-11-02 18:19:53,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:19:53,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:19:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:19:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:19:53,527 INFO L87 Difference]: Start difference. First operand 11510 states and 16086 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:19:55,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:20:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:20:49,812 INFO L93 Difference]: Finished difference Result 31898 states and 44652 transitions. [2021-11-02 18:20:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:20:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 18:20:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:20:49,855 INFO L225 Difference]: With dead ends: 31898 [2021-11-02 18:20:49,855 INFO L226 Difference]: Without dead ends: 20406 [2021-11-02 18:20:49,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.82ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:20:49,871 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3162 mSDsluCounter, 4093 mSDsCounter, 0 mSdLazyCounter, 11364 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52090.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3164 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.79ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11364 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55223.49ms IncrementalHoareTripleChecker+Time [2021-11-02 18:20:49,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3164 Valid, 38 Invalid, 11371 Unknown, 0 Unchecked, 57.79ms Time], IncrementalHoareTripleChecker [6 Valid, 11364 Invalid, 1 Unknown, 0 Unchecked, 55223.49ms Time] [2021-11-02 18:20:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-11-02 18:20:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 11526. [2021-11-02 18:20:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11526 states, 11481 states have (on average 1.3955230380628865) internal successors, (16022), 11481 states have internal predecessors, (16022), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:20:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11526 states to 11526 states and 16102 transitions. [2021-11-02 18:20:50,202 INFO L78 Accepts]: Start accepts. Automaton has 11526 states and 16102 transitions. Word has length 72 [2021-11-02 18:20:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:20:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 11526 states and 16102 transitions. [2021-11-02 18:20:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:20:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 11526 states and 16102 transitions. [2021-11-02 18:20:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 18:20:50,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:20:50,215 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] [2021-11-02 18:20:50,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 18:20:50,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 18:20:50,431 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:20:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:20:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1725726798, now seen corresponding path program 1 times [2021-11-02 18:20:50,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:20:50,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360956471] [2021-11-02 18:20:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:20:50,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:20:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:20:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:20:50,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:20:50,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360956471] [2021-11-02 18:20:50,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360956471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:20:50,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775184769] [2021-11-02 18:20:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:20:50,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:20:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:20:50,654 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) [2021-11-02 18:20:50,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 18:20:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:20:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 18:20:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:20:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:20:51,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:20:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:20:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775184769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 18:20:52,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 18:20:52,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-02 18:20:52,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063334743] [2021-11-02 18:20:52,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 18:20:52,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:20:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 18:20:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:20:52,318 INFO L87 Difference]: Start difference. First operand 11526 states and 16102 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2021-11-02 18:20:54,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:21:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:21:48,999 INFO L93 Difference]: Finished difference Result 23214 states and 32423 transitions. [2021-11-02 18:21:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 18:21:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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 75 [2021-11-02 18:21:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:21:49,023 INFO L225 Difference]: With dead ends: 23214 [2021-11-02 18:21:49,023 INFO L226 Difference]: Without dead ends: 11706 [2021-11-02 18:21:49,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.56ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:21:49,040 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 8172 mSDsCounter, 0 mSdLazyCounter, 12310 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52839.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.31ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 12310 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55893.82ms IncrementalHoareTripleChecker+Time [2021-11-02 18:21:49,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 48 Invalid, 12360 Unknown, 0 Unchecked, 70.31ms Time], IncrementalHoareTripleChecker [49 Valid, 12310 Invalid, 1 Unknown, 0 Unchecked, 55893.82ms Time] [2021-11-02 18:21:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11706 states. [2021-11-02 18:21:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11706 to 11706. [2021-11-02 18:21:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11706 states, 11661 states have (on average 1.3894177171769144) internal successors, (16202), 11661 states have internal predecessors, (16202), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:21:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11706 states to 11706 states and 16282 transitions. [2021-11-02 18:21:49,304 INFO L78 Accepts]: Start accepts. Automaton has 11706 states and 16282 transitions. Word has length 75 [2021-11-02 18:21:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:21:49,305 INFO L470 AbstractCegarLoop]: Abstraction has 11706 states and 16282 transitions. [2021-11-02 18:21:49,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2021-11-02 18:21:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11706 states and 16282 transitions. [2021-11-02 18:21:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 18:21:49,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:21:49,316 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] [2021-11-02 18:21:49,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 18:21:49,538 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 [2021-11-02 18:21:49,538 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:21:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:21:49,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1409683414, now seen corresponding path program 1 times [2021-11-02 18:21:49,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:21:49,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781533922] [2021-11-02 18:21:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:21:49,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:21:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:21:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:21:49,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:21:49,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781533922] [2021-11-02 18:21:49,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781533922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:21:49,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:21:49,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:21:49,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538932764] [2021-11-02 18:21:49,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:21:49,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:21:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:21:49,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:21:49,710 INFO L87 Difference]: Start difference. First operand 11706 states and 16282 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:21:51,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:22:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:22:39,174 INFO L93 Difference]: Finished difference Result 31370 states and 43644 transitions. [2021-11-02 18:22:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:22:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 18:22:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:22:39,213 INFO L225 Difference]: With dead ends: 31370 [2021-11-02 18:22:39,213 INFO L226 Difference]: Without dead ends: 19682 [2021-11-02 18:22:39,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.97ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:22:39,237 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3084 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 10133 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45428.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3086 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 10147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.18ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 10133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48422.23ms IncrementalHoareTripleChecker+Time [2021-11-02 18:22:39,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3086 Valid, 38 Invalid, 10147 Unknown, 0 Unchecked, 50.18ms Time], IncrementalHoareTripleChecker [13 Valid, 10133 Invalid, 1 Unknown, 0 Unchecked, 48422.23ms Time] [2021-11-02 18:22:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19682 states. [2021-11-02 18:22:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19682 to 12206. [2021-11-02 18:22:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12206 states, 12161 states have (on average 1.3873859057643285) internal successors, (16872), 12161 states have internal predecessors, (16872), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:22:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12206 states to 12206 states and 16952 transitions. [2021-11-02 18:22:39,554 INFO L78 Accepts]: Start accepts. Automaton has 12206 states and 16952 transitions. Word has length 77 [2021-11-02 18:22:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:22:39,554 INFO L470 AbstractCegarLoop]: Abstraction has 12206 states and 16952 transitions. [2021-11-02 18:22:39,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:22:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12206 states and 16952 transitions. [2021-11-02 18:22:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 18:22:39,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:22:39,571 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] [2021-11-02 18:22:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 18:22:39,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:22:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:22:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1526298904, now seen corresponding path program 1 times [2021-11-02 18:22:39,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:22:39,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431026419] [2021-11-02 18:22:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:22:39,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:22:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:22:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 18:22:39,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:22:39,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431026419] [2021-11-02 18:22:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431026419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:22:39,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:22:39,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:22:39,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426800960] [2021-11-02 18:22:39,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:22:39,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:22:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:22:39,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:22:39,734 INFO L87 Difference]: Start difference. First operand 12206 states and 16952 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-11-02 18:22:41,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:23:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:23:18,046 INFO L93 Difference]: Finished difference Result 24494 states and 34043 transitions. [2021-11-02 18:23:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:23:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-11-02 18:23:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:23:18,069 INFO L225 Difference]: With dead ends: 24494 [2021-11-02 18:23:18,070 INFO L226 Difference]: Without dead ends: 12306 [2021-11-02 18:23:18,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.61ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:23:18,090 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 366 mSDsluCounter, 3706 mSDsCounter, 0 mSdLazyCounter, 7825 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35377.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.35ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7825 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37525.45ms IncrementalHoareTripleChecker+Time [2021-11-02 18:23:18,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 32 Invalid, 7849 Unknown, 0 Unchecked, 40.35ms Time], IncrementalHoareTripleChecker [23 Valid, 7825 Invalid, 1 Unknown, 0 Unchecked, 37525.45ms Time] [2021-11-02 18:23:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12306 states. [2021-11-02 18:23:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12306 to 12286. [2021-11-02 18:23:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12286 states, 12241 states have (on average 1.3848541785801813) internal successors, (16952), 12241 states have internal predecessors, (16952), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-02 18:23:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12286 states to 12286 states and 17032 transitions. [2021-11-02 18:23:18,408 INFO L78 Accepts]: Start accepts. Automaton has 12286 states and 17032 transitions. Word has length 81 [2021-11-02 18:23:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:23:18,408 INFO L470 AbstractCegarLoop]: Abstraction has 12286 states and 17032 transitions. [2021-11-02 18:23:18,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-11-02 18:23:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12286 states and 17032 transitions. [2021-11-02 18:23:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:23:18,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:23:18,419 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] [2021-11-02 18:23:18,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 18:23:18,420 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:23:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:23:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1662728223, now seen corresponding path program 1 times [2021-11-02 18:23:18,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:23:18,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555134638] [2021-11-02 18:23:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:23:18,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:23:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:23:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:23:18,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:23:18,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555134638] [2021-11-02 18:23:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555134638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:23:18,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:23:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:23:18,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174659293] [2021-11-02 18:23:18,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:23:18,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:23:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:23:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:23:18,645 INFO L87 Difference]: Start difference. First operand 12286 states and 17032 transitions. Second operand has 4 states, 4 states have (on average 21.0) 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) [2021-11-02 18:23:20,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:23:52,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:24:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:24:32,319 INFO L93 Difference]: Finished difference Result 42782 states and 59263 transitions. [2021-11-02 18:24:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:24:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) 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 [2021-11-02 18:24:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:24:32,434 INFO L225 Difference]: With dead ends: 42782 [2021-11-02 18:24:32,434 INFO L226 Difference]: Without dead ends: 30514 [2021-11-02 18:24:32,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.54ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:24:32,465 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 5853 mSDsluCounter, 8527 mSDsCounter, 0 mSdLazyCounter, 15901 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67940.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5853 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 15928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 96.14ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 15901 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71921.02ms IncrementalHoareTripleChecker+Time [2021-11-02 18:24:32,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5853 Valid, 69 Invalid, 15928 Unknown, 0 Unchecked, 96.14ms Time], IncrementalHoareTripleChecker [26 Valid, 15901 Invalid, 1 Unknown, 0 Unchecked, 71921.02ms Time] [2021-11-02 18:24:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30514 states. [2021-11-02 18:24:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30514 to 22496. [2021-11-02 18:24:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22496 states, 22411 states have (on average 1.3840078532863327) internal successors, (31017), 22407 states have internal predecessors, (31017), 60 states have call successors, (60), 24 states have call predecessors, (60), 24 states have return successors, (180), 64 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-02 18:24:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22496 states to 22496 states and 31257 transitions. [2021-11-02 18:24:33,216 INFO L78 Accepts]: Start accepts. Automaton has 22496 states and 31257 transitions. Word has length 84 [2021-11-02 18:24:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:24:33,218 INFO L470 AbstractCegarLoop]: Abstraction has 22496 states and 31257 transitions. [2021-11-02 18:24:33,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) 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) [2021-11-02 18:24:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 22496 states and 31257 transitions. [2021-11-02 18:24:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:24:33,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:24:33,239 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] [2021-11-02 18:24:33,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 18:24:33,240 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:24:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:24:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2096457309, now seen corresponding path program 1 times [2021-11-02 18:24:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:24:33,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397109838] [2021-11-02 18:24:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:24:33,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:24:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:24:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:24:33,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:24:33,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397109838] [2021-11-02 18:24:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397109838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:24:33,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:24:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:24:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969977016] [2021-11-02 18:24:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:24:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:24:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:24:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:24:33,438 INFO L87 Difference]: Start difference. First operand 22496 states and 31257 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) [2021-11-02 18:24:35,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:25:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:25:22,659 INFO L93 Difference]: Finished difference Result 61656 states and 85481 transitions. [2021-11-02 18:25:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:25:22,659 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 [2021-11-02 18:25:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:25:22,753 INFO L225 Difference]: With dead ends: 61656 [2021-11-02 18:25:22,753 INFO L226 Difference]: Without dead ends: 39178 [2021-11-02 18:25:22,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.61ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:25:22,805 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3126 mSDsluCounter, 3930 mSDsCounter, 0 mSdLazyCounter, 9897 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44838.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3128 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.08ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 9897 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47482.66ms IncrementalHoareTripleChecker+Time [2021-11-02 18:25:22,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3128 Valid, 38 Invalid, 9908 Unknown, 0 Unchecked, 51.08ms Time], IncrementalHoareTripleChecker [10 Valid, 9897 Invalid, 1 Unknown, 0 Unchecked, 47482.66ms Time] [2021-11-02 18:25:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39178 states. [2021-11-02 18:25:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39178 to 22516. [2021-11-02 18:25:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22516 states, 22431 states have (on average 1.3836654629753466) internal successors, (31037), 22427 states have internal predecessors, (31037), 60 states have call successors, (60), 24 states have call predecessors, (60), 24 states have return successors, (180), 64 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-02 18:25:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22516 states to 22516 states and 31277 transitions. [2021-11-02 18:25:23,601 INFO L78 Accepts]: Start accepts. Automaton has 22516 states and 31277 transitions. Word has length 84 [2021-11-02 18:25:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:25:23,601 INFO L470 AbstractCegarLoop]: Abstraction has 22516 states and 31277 transitions. [2021-11-02 18:25:23,601 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) [2021-11-02 18:25:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22516 states and 31277 transitions. [2021-11-02 18:25:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:25:23,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:25:23,618 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] [2021-11-02 18:25:23,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 18:25:23,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:25:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:25:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 67871199, now seen corresponding path program 1 times [2021-11-02 18:25:23,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:25:23,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865940626] [2021-11-02 18:25:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:25:23,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:25:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:25:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:25:23,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:25:23,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865940626] [2021-11-02 18:25:23,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865940626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:25:23,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:25:23,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:25:23,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754630321] [2021-11-02 18:25:23,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:25:23,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:25:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:25:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:25:23,865 INFO L87 Difference]: Start difference. First operand 22516 states and 31277 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-02 18:25:25,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:26:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:26:36,014 INFO L93 Difference]: Finished difference Result 46734 states and 65013 transitions. [2021-11-02 18:26:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:26:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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 [2021-11-02 18:26:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:26:36,067 INFO L225 Difference]: With dead ends: 46734 [2021-11-02 18:26:36,067 INFO L226 Difference]: Without dead ends: 24236 [2021-11-02 18:26:36,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.25ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 18:26:36,110 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 384 mSDsluCounter, 10417 mSDsCounter, 0 mSdLazyCounter, 16359 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67328.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 101.05ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16359 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70780.26ms IncrementalHoareTripleChecker+Time [2021-11-02 18:26:36,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 64 Invalid, 16374 Unknown, 0 Unchecked, 101.05ms Time], IncrementalHoareTripleChecker [14 Valid, 16359 Invalid, 1 Unknown, 0 Unchecked, 70780.26ms Time] [2021-11-02 18:26:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24236 states. [2021-11-02 18:26:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24236 to 22776. [2021-11-02 18:26:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22776 states, 22691 states have (on average 1.3845577541756644) internal successors, (31417), 22687 states have internal predecessors, (31417), 60 states have call successors, (60), 24 states have call predecessors, (60), 24 states have return successors, (180), 64 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-02 18:26:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22776 states to 22776 states and 31657 transitions. [2021-11-02 18:26:36,879 INFO L78 Accepts]: Start accepts. Automaton has 22776 states and 31657 transitions. Word has length 84 [2021-11-02 18:26:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:26:36,879 INFO L470 AbstractCegarLoop]: Abstraction has 22776 states and 31657 transitions. [2021-11-02 18:26:36,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2021-11-02 18:26:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 22776 states and 31657 transitions. [2021-11-02 18:26:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:26:36,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:26:36,895 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] [2021-11-02 18:26:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 18:26:36,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:26:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:26:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1881892437, now seen corresponding path program 2 times [2021-11-02 18:26:36,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:26:36,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700425506] [2021-11-02 18:26:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:26:36,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:26:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:26:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 18:26:37,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:26:37,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700425506] [2021-11-02 18:26:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700425506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:26:37,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:26:37,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:26:37,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504885291] [2021-11-02 18:26:37,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:26:37,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:26:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:26:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:26:37,610 INFO L87 Difference]: Start difference. First operand 22776 states and 31657 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:26:39,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:26:45,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:28:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:28:22,423 INFO L93 Difference]: Finished difference Result 61016 states and 84979 transitions. [2021-11-02 18:28:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 18:28:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 18:28:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:28:22,523 INFO L225 Difference]: With dead ends: 61016 [2021-11-02 18:28:22,524 INFO L226 Difference]: Without dead ends: 38258 [2021-11-02 18:28:22,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 167.64ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:28:22,573 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6236 mSDsluCounter, 14217 mSDsCounter, 0 mSdLazyCounter, 21524 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96848.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6236 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 21584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 163.14ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 21524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102298.41ms IncrementalHoareTripleChecker+Time [2021-11-02 18:28:22,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6236 Valid, 76 Invalid, 21584 Unknown, 0 Unchecked, 163.14ms Time], IncrementalHoareTripleChecker [59 Valid, 21524 Invalid, 1 Unknown, 0 Unchecked, 102298.41ms Time] [2021-11-02 18:28:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38258 states. [2021-11-02 18:28:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38258 to 22956. [2021-11-02 18:28:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22956 states, 22871 states have (on average 1.3815311967119934) internal successors, (31597), 22867 states have internal predecessors, (31597), 60 states have call successors, (60), 24 states have call predecessors, (60), 24 states have return successors, (180), 64 states have call predecessors, (180), 60 states have call successors, (180) [2021-11-02 18:28:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22956 states to 22956 states and 31837 transitions. [2021-11-02 18:28:23,539 INFO L78 Accepts]: Start accepts. Automaton has 22956 states and 31837 transitions. Word has length 84 [2021-11-02 18:28:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:28:23,539 INFO L470 AbstractCegarLoop]: Abstraction has 22956 states and 31837 transitions. [2021-11-02 18:28:23,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:28:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 22956 states and 31837 transitions. [2021-11-02 18:28:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 18:28:23,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:28:23,554 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] [2021-11-02 18:28:23,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 18:28:23,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:28:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:28:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1662174855, now seen corresponding path program 1 times [2021-11-02 18:28:23,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:28:23,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686683575] [2021-11-02 18:28:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:28:23,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:28:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:28:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 18:28:23,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:28:23,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686683575] [2021-11-02 18:28:23,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686683575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:28:23,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478039534] [2021-11-02 18:28:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:28:23,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:28:23,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:28:23,755 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) [2021-11-02 18:28:23,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 18:28:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:28:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2812 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 18:28:24,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:28:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 18:28:25,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:28:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 18:28:25,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478039534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 18:28:25,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 18:28:25,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-02 18:28:25,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21993018] [2021-11-02 18:28:25,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 18:28:25,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:28:25,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 18:28:25,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:28:25,536 INFO L87 Difference]: Start difference. First operand 22956 states and 31837 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 18:28:27,577 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15