/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:10:40,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:10:40,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:10:40,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:10:40,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:10:40,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:10:40,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:10:40,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:10:40,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:10:40,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:10:40,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:10:40,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:10:40,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:10:40,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:10:40,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:10:40,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:10:40,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:10:40,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:10:40,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:10:40,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:10:40,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:10:40,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:10:40,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:10:40,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:10:40,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:10:40,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:10:40,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:10:40,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:10:40,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:10:40,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:10:40,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:10:40,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:10:40,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:10:40,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:10:40,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:10:40,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:10:40,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:10:40,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:10:40,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:10:40,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:10:40,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:10:40,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:10:40,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:10:40,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:10:40,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:10:40,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:10:40,417 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:10:40,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:10:40,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:10:40,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:10:40,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:10:40,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:10:40,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:10:40,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:10:40,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:10:40,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:10:40,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:10:40,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:10:40,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:10:40,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:10:40,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:10:40,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:10:40,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:10:40,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:10:40,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:10:40,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:10:40,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:10:40,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:10:40,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:10:40,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:10:40,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:10:40,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:10:40,889 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:10:40,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2020-12-22 13:10:40,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e50cad8/2c9f1646aab241479c17c8a9c2dc3e13/FLAG5afa748f3 [2020-12-22 13:10:42,174 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:10:42,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2020-12-22 13:10:42,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e50cad8/2c9f1646aab241479c17c8a9c2dc3e13/FLAG5afa748f3 [2020-12-22 13:10:42,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e50cad8/2c9f1646aab241479c17c8a9c2dc3e13 [2020-12-22 13:10:42,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:10:42,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:10:42,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:42,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:10:42,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:10:42,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:42" (1/1) ... [2020-12-22 13:10:42,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f628c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:42, skipping insertion in model container [2020-12-22 13:10:42,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:42" (1/1) ... [2020-12-22 13:10:42,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:10:42,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:10:43,928 WARN L226 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2020-12-22 13:10:44,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:44,777 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:10:45,103 WARN L226 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2020-12-22 13:10:45,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:45,613 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:10:45,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45 WrapperNode [2020-12-22 13:10:45,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:45,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:45,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:10:45,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:10:45,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:45,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:10:45,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:10:45,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:10:45,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:46,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:46,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:46,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:46,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:10:46,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:10:46,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:10:46,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:10:46,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:10:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:10:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2020-12-22 13:10:46,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2020-12-22 13:10:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2020-12-22 13:10:46,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2020-12-22 13:10:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:10:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:10:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:10:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2020-12-22 13:10:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2020-12-22 13:10:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-12-22 13:10:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-12-22 13:10:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:10:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:10:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:10:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:10:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:10:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2020-12-22 13:10:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2020-12-22 13:10:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:10:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:10:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:10:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:10:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:10:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:10:55,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:10:55,975 INFO L299 CfgBuilder]: Removed 593 assume(true) statements. [2020-12-22 13:10:55,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:55 BoogieIcfgContainer [2020-12-22 13:10:55,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:10:55,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:10:55,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:10:55,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:10:55,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:42" (1/3) ... [2020-12-22 13:10:55,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc25c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:55, skipping insertion in model container [2020-12-22 13:10:55,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (2/3) ... [2020-12-22 13:10:55,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc25c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:55, skipping insertion in model container [2020-12-22 13:10:55,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:55" (3/3) ... [2020-12-22 13:10:55,992 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2020-12-22 13:10:56,001 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:10:56,011 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 13:10:56,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 13:10:56,068 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:10:56,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:10:56,068 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:10:56,069 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:10:56,069 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:10:56,069 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:10:56,069 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:10:56,069 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:10:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states. [2020-12-22 13:10:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 13:10:56,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:56,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:56,114 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash 990042253, now seen corresponding path program 1 times [2020-12-22 13:10:56,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:56,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583779762] [2020-12-22 13:10:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:56,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583779762] [2020-12-22 13:10:56,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:56,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:10:56,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156541849] [2020-12-22 13:10:56,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:56,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:56,823 INFO L87 Difference]: Start difference. First operand 620 states. Second operand 3 states. [2020-12-22 13:10:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:57,806 INFO L93 Difference]: Finished difference Result 1806 states and 2584 transitions. [2020-12-22 13:10:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:57,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 13:10:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:57,849 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 13:10:57,849 INFO L226 Difference]: Without dead ends: 1173 [2020-12-22 13:10:57,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2020-12-22 13:10:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1173. [2020-12-22 13:10:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-12-22 13:10:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1622 transitions. [2020-12-22 13:10:58,070 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1622 transitions. Word has length 17 [2020-12-22 13:10:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:58,071 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1622 transitions. [2020-12-22 13:10:58,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1622 transitions. [2020-12-22 13:10:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 13:10:58,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:58,076 INFO L422 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] [2020-12-22 13:10:58,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:10:58,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1542514015, now seen corresponding path program 1 times [2020-12-22 13:10:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:58,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715229419] [2020-12-22 13:10:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:58,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715229419] [2020-12-22 13:10:58,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:58,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:58,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120102738] [2020-12-22 13:10:58,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:58,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:58,391 INFO L87 Difference]: Start difference. First operand 1173 states and 1622 transitions. Second operand 3 states. [2020-12-22 13:10:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:58,677 INFO L93 Difference]: Finished difference Result 3491 states and 4901 transitions. [2020-12-22 13:10:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:58,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 13:10:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:58,696 INFO L225 Difference]: With dead ends: 3491 [2020-12-22 13:10:58,696 INFO L226 Difference]: Without dead ends: 2331 [2020-12-22 13:10:58,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2020-12-22 13:10:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2319. [2020-12-22 13:10:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2319 states. [2020-12-22 13:10:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3224 transitions. [2020-12-22 13:10:58,823 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3224 transitions. Word has length 24 [2020-12-22 13:10:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:58,823 INFO L481 AbstractCegarLoop]: Abstraction has 2319 states and 3224 transitions. [2020-12-22 13:10:58,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3224 transitions. [2020-12-22 13:10:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 13:10:58,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:58,826 INFO L422 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] [2020-12-22 13:10:58,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:10:58,827 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:58,827 INFO L82 PathProgramCache]: Analyzing trace with hash -573293837, now seen corresponding path program 1 times [2020-12-22 13:10:58,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:58,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964874197] [2020-12-22 13:10:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964874197] [2020-12-22 13:10:59,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:59,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:59,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374355009] [2020-12-22 13:10:59,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:59,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:59,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:59,142 INFO L87 Difference]: Start difference. First operand 2319 states and 3224 transitions. Second operand 3 states. [2020-12-22 13:10:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:59,266 INFO L93 Difference]: Finished difference Result 2319 states and 3224 transitions. [2020-12-22 13:10:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:59,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 13:10:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:59,287 INFO L225 Difference]: With dead ends: 2319 [2020-12-22 13:10:59,287 INFO L226 Difference]: Without dead ends: 2317 [2020-12-22 13:10:59,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2020-12-22 13:10:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2020-12-22 13:10:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-12-22 13:10:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3222 transitions. [2020-12-22 13:10:59,439 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3222 transitions. Word has length 25 [2020-12-22 13:10:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:59,439 INFO L481 AbstractCegarLoop]: Abstraction has 2317 states and 3222 transitions. [2020-12-22 13:10:59,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3222 transitions. [2020-12-22 13:10:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:10:59,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:59,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:59,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:10:59,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -592239381, now seen corresponding path program 1 times [2020-12-22 13:10:59,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:59,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665416069] [2020-12-22 13:10:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:59,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665416069] [2020-12-22 13:10:59,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:59,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:59,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887558464] [2020-12-22 13:10:59,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:59,627 INFO L87 Difference]: Start difference. First operand 2317 states and 3222 transitions. Second operand 3 states. [2020-12-22 13:10:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:59,744 INFO L93 Difference]: Finished difference Result 2317 states and 3222 transitions. [2020-12-22 13:10:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:59,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 13:10:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:59,759 INFO L225 Difference]: With dead ends: 2317 [2020-12-22 13:10:59,759 INFO L226 Difference]: Without dead ends: 2315 [2020-12-22 13:10:59,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-12-22 13:10:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2315. [2020-12-22 13:10:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2315 states. [2020-12-22 13:10:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3220 transitions. [2020-12-22 13:10:59,907 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3220 transitions. Word has length 26 [2020-12-22 13:10:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:59,908 INFO L481 AbstractCegarLoop]: Abstraction has 2315 states and 3220 transitions. [2020-12-22 13:10:59,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3220 transitions. [2020-12-22 13:10:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 13:10:59,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:59,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:59,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:10:59,912 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:59,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1179551235, now seen corresponding path program 1 times [2020-12-22 13:10:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:59,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645655218] [2020-12-22 13:10:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:00,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645655218] [2020-12-22 13:11:00,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:00,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:00,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012403088] [2020-12-22 13:11:00,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:00,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:00,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:00,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:00,092 INFO L87 Difference]: Start difference. First operand 2315 states and 3220 transitions. Second operand 3 states. [2020-12-22 13:11:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:00,229 INFO L93 Difference]: Finished difference Result 2315 states and 3220 transitions. [2020-12-22 13:11:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:00,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 13:11:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:00,249 INFO L225 Difference]: With dead ends: 2315 [2020-12-22 13:11:00,250 INFO L226 Difference]: Without dead ends: 2313 [2020-12-22 13:11:00,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2020-12-22 13:11:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2313. [2020-12-22 13:11:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2313 states. [2020-12-22 13:11:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3218 transitions. [2020-12-22 13:11:00,412 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3218 transitions. Word has length 27 [2020-12-22 13:11:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:00,413 INFO L481 AbstractCegarLoop]: Abstraction has 2313 states and 3218 transitions. [2020-12-22 13:11:00,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3218 transitions. [2020-12-22 13:11:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:11:00,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:00,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:00,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:11:00,415 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2088617781, now seen corresponding path program 1 times [2020-12-22 13:11:00,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:00,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751333977] [2020-12-22 13:11:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:00,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751333977] [2020-12-22 13:11:00,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:00,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:11:00,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025688131] [2020-12-22 13:11:00,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:00,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:00,662 INFO L87 Difference]: Start difference. First operand 2313 states and 3218 transitions. Second operand 3 states. [2020-12-22 13:11:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:00,801 INFO L93 Difference]: Finished difference Result 2313 states and 3218 transitions. [2020-12-22 13:11:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:00,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-22 13:11:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:00,825 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 13:11:00,826 INFO L226 Difference]: Without dead ends: 2304 [2020-12-22 13:11:00,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2020-12-22 13:11:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2020-12-22 13:11:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-22 13:11:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3206 transitions. [2020-12-22 13:11:01,020 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3206 transitions. Word has length 28 [2020-12-22 13:11:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:01,022 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3206 transitions. [2020-12-22 13:11:01,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3206 transitions. [2020-12-22 13:11:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 13:11:01,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:01,029 INFO L422 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] [2020-12-22 13:11:01,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:11:01,029 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 578971499, now seen corresponding path program 1 times [2020-12-22 13:11:01,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:01,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238933982] [2020-12-22 13:11:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238933982] [2020-12-22 13:11:01,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:01,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631075484] [2020-12-22 13:11:01,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:01,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:01,206 INFO L87 Difference]: Start difference. First operand 2304 states and 3206 transitions. Second operand 3 states. [2020-12-22 13:11:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:01,492 INFO L93 Difference]: Finished difference Result 5086 states and 7025 transitions. [2020-12-22 13:11:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:01,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 13:11:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:01,513 INFO L225 Difference]: With dead ends: 5086 [2020-12-22 13:11:01,513 INFO L226 Difference]: Without dead ends: 2795 [2020-12-22 13:11:01,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2020-12-22 13:11:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2790. [2020-12-22 13:11:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2020-12-22 13:11:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3826 transitions. [2020-12-22 13:11:01,722 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3826 transitions. Word has length 52 [2020-12-22 13:11:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:01,722 INFO L481 AbstractCegarLoop]: Abstraction has 2790 states and 3826 transitions. [2020-12-22 13:11:01,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3826 transitions. [2020-12-22 13:11:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 13:11:01,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:01,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:01,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:11:01,727 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:01,728 INFO L82 PathProgramCache]: Analyzing trace with hash -587987276, now seen corresponding path program 1 times [2020-12-22 13:11:01,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:01,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206057675] [2020-12-22 13:11:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206057675] [2020-12-22 13:11:01,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:01,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001909701] [2020-12-22 13:11:01,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:01,900 INFO L87 Difference]: Start difference. First operand 2790 states and 3826 transitions. Second operand 3 states. [2020-12-22 13:11:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:03,027 INFO L93 Difference]: Finished difference Result 6106 states and 8353 transitions. [2020-12-22 13:11:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:03,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 13:11:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:03,049 INFO L225 Difference]: With dead ends: 6106 [2020-12-22 13:11:03,050 INFO L226 Difference]: Without dead ends: 3329 [2020-12-22 13:11:03,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2020-12-22 13:11:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3324. [2020-12-22 13:11:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3324 states. [2020-12-22 13:11:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4514 transitions. [2020-12-22 13:11:03,315 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4514 transitions. Word has length 62 [2020-12-22 13:11:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:03,315 INFO L481 AbstractCegarLoop]: Abstraction has 3324 states and 4514 transitions. [2020-12-22 13:11:03,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4514 transitions. [2020-12-22 13:11:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 13:11:03,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:03,320 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:11:03,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:11:03,321 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1736719260, now seen corresponding path program 1 times [2020-12-22 13:11:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:03,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985895290] [2020-12-22 13:11:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:11:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985895290] [2020-12-22 13:11:03,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:03,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493424920] [2020-12-22 13:11:03,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:03,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,471 INFO L87 Difference]: Start difference. First operand 3324 states and 4514 transitions. Second operand 3 states. [2020-12-22 13:11:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:03,877 INFO L93 Difference]: Finished difference Result 8661 states and 11909 transitions. [2020-12-22 13:11:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:03,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 13:11:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:03,922 INFO L225 Difference]: With dead ends: 8661 [2020-12-22 13:11:03,923 INFO L226 Difference]: Without dead ends: 5350 [2020-12-22 13:11:03,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2020-12-22 13:11:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5334. [2020-12-22 13:11:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5334 states. [2020-12-22 13:11:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 7383 transitions. [2020-12-22 13:11:04,246 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 7383 transitions. Word has length 65 [2020-12-22 13:11:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:04,248 INFO L481 AbstractCegarLoop]: Abstraction has 5334 states and 7383 transitions. [2020-12-22 13:11:04,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 7383 transitions. [2020-12-22 13:11:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:11:04,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:04,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:04,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:11:04,255 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:04,256 INFO L82 PathProgramCache]: Analyzing trace with hash 477742688, now seen corresponding path program 1 times [2020-12-22 13:11:04,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:04,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200833429] [2020-12-22 13:11:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:11:04,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200833429] [2020-12-22 13:11:04,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:04,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:04,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140400741] [2020-12-22 13:11:04,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:04,403 INFO L87 Difference]: Start difference. First operand 5334 states and 7383 transitions. Second operand 3 states. [2020-12-22 13:11:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:06,102 INFO L93 Difference]: Finished difference Result 13036 states and 18190 transitions. [2020-12-22 13:11:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:06,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 13:11:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:06,151 INFO L225 Difference]: With dead ends: 13036 [2020-12-22 13:11:06,152 INFO L226 Difference]: Without dead ends: 7715 [2020-12-22 13:11:06,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7715 states. [2020-12-22 13:11:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7715 to 7710. [2020-12-22 13:11:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7710 states. [2020-12-22 13:11:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 10770 transitions. [2020-12-22 13:11:06,579 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 10770 transitions. Word has length 74 [2020-12-22 13:11:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:06,580 INFO L481 AbstractCegarLoop]: Abstraction has 7710 states and 10770 transitions. [2020-12-22 13:11:06,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 10770 transitions. [2020-12-22 13:11:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:11:06,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:06,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:06,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:11:06,585 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1414744033, now seen corresponding path program 1 times [2020-12-22 13:11:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:06,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35291030] [2020-12-22 13:11:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35291030] [2020-12-22 13:11:06,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:06,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:06,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453145923] [2020-12-22 13:11:06,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:06,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:06,745 INFO L87 Difference]: Start difference. First operand 7710 states and 10770 transitions. Second operand 3 states. [2020-12-22 13:11:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:07,245 INFO L93 Difference]: Finished difference Result 15439 states and 21573 transitions. [2020-12-22 13:11:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:07,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 13:11:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:07,302 INFO L225 Difference]: With dead ends: 15439 [2020-12-22 13:11:07,302 INFO L226 Difference]: Without dead ends: 7742 [2020-12-22 13:11:07,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7742 states. [2020-12-22 13:11:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7742 to 7726. [2020-12-22 13:11:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7726 states. [2020-12-22 13:11:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 10786 transitions. [2020-12-22 13:11:07,719 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 10786 transitions. Word has length 75 [2020-12-22 13:11:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:07,720 INFO L481 AbstractCegarLoop]: Abstraction has 7726 states and 10786 transitions. [2020-12-22 13:11:07,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 10786 transitions. [2020-12-22 13:11:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 13:11:07,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:07,726 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:07,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:11:07,726 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:07,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1473234019, now seen corresponding path program 1 times [2020-12-22 13:11:07,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:07,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112635895] [2020-12-22 13:11:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112635895] [2020-12-22 13:11:07,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602502060] [2020-12-22 13:11:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:11:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:08,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:08,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:11:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392766405] [2020-12-22 13:11:08,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:08,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:08,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:08,867 INFO L87 Difference]: Start difference. First operand 7726 states and 10786 transitions. Second operand 5 states. [2020-12-22 13:11:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:09,598 INFO L93 Difference]: Finished difference Result 15487 states and 21621 transitions. [2020-12-22 13:11:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:11:09,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 13:11:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:09,639 INFO L225 Difference]: With dead ends: 15487 [2020-12-22 13:11:09,639 INFO L226 Difference]: Without dead ends: 7774 [2020-12-22 13:11:09,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2020-12-22 13:11:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7758. [2020-12-22 13:11:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7758 states. [2020-12-22 13:11:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7758 states to 7758 states and 10818 transitions. [2020-12-22 13:11:10,099 INFO L78 Accepts]: Start accepts. Automaton has 7758 states and 10818 transitions. Word has length 77 [2020-12-22 13:11:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:10,100 INFO L481 AbstractCegarLoop]: Abstraction has 7758 states and 10818 transitions. [2020-12-22 13:11:10,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7758 states and 10818 transitions. [2020-12-22 13:11:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 13:11:10,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:10,105 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:10,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:11:10,320 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2023698521, now seen corresponding path program 2 times [2020-12-22 13:11:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:10,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418188495] [2020-12-22 13:11:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:11:10,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418188495] [2020-12-22 13:11:10,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351706494] [2020-12-22 13:11:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:13,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:13,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:11:13,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:13,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:13,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 13:11:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675065903] [2020-12-22 13:11:13,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:11:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:11:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:11:13,262 INFO L87 Difference]: Start difference. First operand 7758 states and 10818 transitions. Second operand 7 states. [2020-12-22 13:11:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:15,561 INFO L93 Difference]: Finished difference Result 24331 states and 33831 transitions. [2020-12-22 13:11:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:11:15,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-12-22 13:11:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:15,628 INFO L225 Difference]: With dead ends: 24331 [2020-12-22 13:11:15,628 INFO L226 Difference]: Without dead ends: 16586 [2020-12-22 13:11:15,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:11:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16586 states. [2020-12-22 13:11:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16586 to 16174. [2020-12-22 13:11:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16174 states. [2020-12-22 13:11:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16174 states to 16174 states and 22517 transitions. [2020-12-22 13:11:16,699 INFO L78 Accepts]: Start accepts. Automaton has 16174 states and 22517 transitions. Word has length 79 [2020-12-22 13:11:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:16,699 INFO L481 AbstractCegarLoop]: Abstraction has 16174 states and 22517 transitions. [2020-12-22 13:11:16,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:11:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 16174 states and 22517 transitions. [2020-12-22 13:11:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:11:16,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:16,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:16,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:11:16,927 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash 317541271, now seen corresponding path program 1 times [2020-12-22 13:11:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:16,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409143099] [2020-12-22 13:11:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409143099] [2020-12-22 13:11:17,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591704011] [2020-12-22 13:11:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:11:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:17,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:17,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:11:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573653676] [2020-12-22 13:11:17,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:11:17,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:11:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:11:17,937 INFO L87 Difference]: Start difference. First operand 16174 states and 22517 transitions. Second operand 7 states. [2020-12-22 13:11:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:18,782 INFO L93 Difference]: Finished difference Result 32449 states and 45171 transitions. [2020-12-22 13:11:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:11:18,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-12-22 13:11:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:18,848 INFO L225 Difference]: With dead ends: 32449 [2020-12-22 13:11:18,848 INFO L226 Difference]: Without dead ends: 16288 [2020-12-22 13:11:18,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:11:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16288 states. [2020-12-22 13:11:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16288 to 16250. [2020-12-22 13:11:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16250 states. [2020-12-22 13:11:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 22593 transitions. [2020-12-22 13:11:19,866 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 22593 transitions. Word has length 81 [2020-12-22 13:11:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:19,866 INFO L481 AbstractCegarLoop]: Abstraction has 16250 states and 22593 transitions. [2020-12-22 13:11:19,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:11:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 22593 transitions. [2020-12-22 13:11:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 13:11:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:19,877 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:20,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 13:11:20,093 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1964737107, now seen corresponding path program 2 times [2020-12-22 13:11:20,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:20,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969671290] [2020-12-22 13:11:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969671290] [2020-12-22 13:11:20,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573779926] [2020-12-22 13:11:20,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:22,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:22,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:11:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:22,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 13:11:22,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27601973] [2020-12-22 13:11:22,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:11:22,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:11:22,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:22,945 INFO L87 Difference]: Start difference. First operand 16250 states and 22593 transitions. Second operand 8 states. [2020-12-22 13:11:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:23,957 INFO L93 Difference]: Finished difference Result 32601 states and 45323 transitions. [2020-12-22 13:11:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:11:23,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-12-22 13:11:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:24,031 INFO L225 Difference]: With dead ends: 32601 [2020-12-22 13:11:24,031 INFO L226 Difference]: Without dead ends: 16364 [2020-12-22 13:11:24,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16364 states. [2020-12-22 13:11:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16364 to 16326. [2020-12-22 13:11:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16326 states. [2020-12-22 13:11:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16326 states to 16326 states and 22669 transitions. [2020-12-22 13:11:25,013 INFO L78 Accepts]: Start accepts. Automaton has 16326 states and 22669 transitions. Word has length 83 [2020-12-22 13:11:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 16326 states and 22669 transitions. [2020-12-22 13:11:25,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:11:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16326 states and 22669 transitions. [2020-12-22 13:11:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 13:11:25,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:25,024 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:25,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:25,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 77003279, now seen corresponding path program 3 times [2020-12-22 13:11:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721203650] [2020-12-22 13:11:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721203650] [2020-12-22 13:11:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984108700] [2020-12-22 13:11:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:28,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:11:28,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:11:28,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 13:11:28,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:28,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2020-12-22 13:11:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70617734] [2020-12-22 13:11:28,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:28,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:11:28,545 INFO L87 Difference]: Start difference. First operand 16326 states and 22669 transitions. Second operand 5 states. [2020-12-22 13:11:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:33,035 INFO L93 Difference]: Finished difference Result 52762 states and 72878 transitions. [2020-12-22 13:11:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:11:33,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-12-22 13:11:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:33,175 INFO L225 Difference]: With dead ends: 52762 [2020-12-22 13:11:33,175 INFO L226 Difference]: Without dead ends: 36449 [2020-12-22 13:11:33,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:11:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36449 states. [2020-12-22 13:11:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36449 to 16440. [2020-12-22 13:11:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16440 states. [2020-12-22 13:11:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16440 states to 16440 states and 22783 transitions. [2020-12-22 13:11:35,030 INFO L78 Accepts]: Start accepts. Automaton has 16440 states and 22783 transitions. Word has length 85 [2020-12-22 13:11:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:35,030 INFO L481 AbstractCegarLoop]: Abstraction has 16440 states and 22783 transitions. [2020-12-22 13:11:35,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 16440 states and 22783 transitions. [2020-12-22 13:11:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 13:11:35,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:35,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:35,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:11:35,260 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 129601707, now seen corresponding path program 1 times [2020-12-22 13:11:35,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:35,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14403857] [2020-12-22 13:11:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14403857] [2020-12-22 13:11:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936455423] [2020-12-22 13:11:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:11:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:36,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:36,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 13:11:36,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022808218] [2020-12-22 13:11:36,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:11:36,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:11:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:11:36,439 INFO L87 Difference]: Start difference. First operand 16440 states and 22783 transitions. Second operand 9 states. [2020-12-22 13:11:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:37,429 INFO L93 Difference]: Finished difference Result 32981 states and 45703 transitions. [2020-12-22 13:11:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:11:37,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-12-22 13:11:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:37,492 INFO L225 Difference]: With dead ends: 32981 [2020-12-22 13:11:37,493 INFO L226 Difference]: Without dead ends: 16554 [2020-12-22 13:11:37,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:11:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16554 states. [2020-12-22 13:11:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16554 to 16516. [2020-12-22 13:11:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16516 states. [2020-12-22 13:11:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16516 states to 16516 states and 22859 transitions. [2020-12-22 13:11:38,679 INFO L78 Accepts]: Start accepts. Automaton has 16516 states and 22859 transitions. Word has length 87 [2020-12-22 13:11:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:38,679 INFO L481 AbstractCegarLoop]: Abstraction has 16516 states and 22859 transitions. [2020-12-22 13:11:38,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:11:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 16516 states and 22859 transitions. [2020-12-22 13:11:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 13:11:38,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:38,695 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:38,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:11:38,909 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1743442535, now seen corresponding path program 2 times [2020-12-22 13:11:38,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854390850] [2020-12-22 13:11:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:39,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854390850] [2020-12-22 13:11:39,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748182708] [2020-12-22 13:11:39,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:41,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1460 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:11:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:41,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:41,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 13:11:41,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096978065] [2020-12-22 13:11:41,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:11:41,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:11:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:11:41,927 INFO L87 Difference]: Start difference. First operand 16516 states and 22859 transitions. Second operand 10 states. [2020-12-22 13:11:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:42,902 INFO L93 Difference]: Finished difference Result 33133 states and 45855 transitions. [2020-12-22 13:11:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:11:42,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-12-22 13:11:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:42,975 INFO L225 Difference]: With dead ends: 33133 [2020-12-22 13:11:42,975 INFO L226 Difference]: Without dead ends: 16630 [2020-12-22 13:11:43,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:11:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2020-12-22 13:11:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 16592. [2020-12-22 13:11:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16592 states. [2020-12-22 13:11:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16592 states to 16592 states and 22935 transitions. [2020-12-22 13:11:44,311 INFO L78 Accepts]: Start accepts. Automaton has 16592 states and 22935 transitions. Word has length 89 [2020-12-22 13:11:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:44,311 INFO L481 AbstractCegarLoop]: Abstraction has 16592 states and 22935 transitions. [2020-12-22 13:11:44,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:11:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 16592 states and 22935 transitions. [2020-12-22 13:11:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 13:11:44,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:44,323 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:44,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:11:44,539 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2133682909, now seen corresponding path program 3 times [2020-12-22 13:11:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376858055] [2020-12-22 13:11:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:44,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376858055] [2020-12-22 13:11:44,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960202197] [2020-12-22 13:11:44,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:48,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:11:48,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 13:11:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 13:11:48,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:48,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2020-12-22 13:11:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338804400] [2020-12-22 13:11:48,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:48,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:11:48,884 INFO L87 Difference]: Start difference. First operand 16592 states and 22935 transitions. Second operand 5 states. [2020-12-22 13:11:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:51,869 INFO L93 Difference]: Finished difference Result 58690 states and 79579 transitions. [2020-12-22 13:11:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:11:51,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-12-22 13:11:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:51,994 INFO L225 Difference]: With dead ends: 58690 [2020-12-22 13:11:51,995 INFO L226 Difference]: Without dead ends: 42111 [2020-12-22 13:11:52,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-22 13:11:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42111 states. [2020-12-22 13:11:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42111 to 16872. [2020-12-22 13:11:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16872 states. [2020-12-22 13:11:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16872 states to 16872 states and 23285 transitions. [2020-12-22 13:11:53,531 INFO L78 Accepts]: Start accepts. Automaton has 16872 states and 23285 transitions. Word has length 91 [2020-12-22 13:11:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:53,532 INFO L481 AbstractCegarLoop]: Abstraction has 16872 states and 23285 transitions. [2020-12-22 13:11:53,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 16872 states and 23285 transitions. [2020-12-22 13:11:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 13:11:53,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:53,545 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:53,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:53,760 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash 610829863, now seen corresponding path program 1 times [2020-12-22 13:11:53,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:53,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095730801] [2020-12-22 13:11:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095730801] [2020-12-22 13:11:53,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117965095] [2020-12-22 13:11:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:11:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:11:54,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:54,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 13:11:54,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590441268] [2020-12-22 13:11:54,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:11:54,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:11:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:11:54,770 INFO L87 Difference]: Start difference. First operand 16872 states and 23285 transitions. Second operand 11 states. [2020-12-22 13:11:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:55,695 INFO L93 Difference]: Finished difference Result 33845 states and 46707 transitions. [2020-12-22 13:11:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:11:55,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-12-22 13:11:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:55,747 INFO L225 Difference]: With dead ends: 33845 [2020-12-22 13:11:55,748 INFO L226 Difference]: Without dead ends: 16986 [2020-12-22 13:11:55,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:11:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16986 states. [2020-12-22 13:11:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16986 to 16948. [2020-12-22 13:11:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16948 states. [2020-12-22 13:11:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16948 states to 16948 states and 23361 transitions. [2020-12-22 13:11:56,921 INFO L78 Accepts]: Start accepts. Automaton has 16948 states and 23361 transitions. Word has length 93 [2020-12-22 13:11:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:56,921 INFO L481 AbstractCegarLoop]: Abstraction has 16948 states and 23361 transitions. [2020-12-22 13:11:56,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:11:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16948 states and 23361 transitions. [2020-12-22 13:11:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 13:11:56,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:56,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:57,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:57,147 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -531555131, now seen corresponding path program 1 times [2020-12-22 13:11:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:57,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265628643] [2020-12-22 13:11:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:11:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265628643] [2020-12-22 13:11:57,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:57,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:57,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373510427] [2020-12-22 13:11:57,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:57,318 INFO L87 Difference]: Start difference. First operand 16948 states and 23361 transitions. Second operand 3 states. [2020-12-22 13:11:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:58,345 INFO L93 Difference]: Finished difference Result 34017 states and 46975 transitions. [2020-12-22 13:11:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:58,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 13:11:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:58,389 INFO L225 Difference]: With dead ends: 34017 [2020-12-22 13:11:58,389 INFO L226 Difference]: Without dead ends: 17082 [2020-12-22 13:11:58,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17082 states. [2020-12-22 13:11:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17082 to 17082. [2020-12-22 13:11:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17082 states. [2020-12-22 13:11:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17082 states to 17082 states and 23495 transitions. [2020-12-22 13:11:59,595 INFO L78 Accepts]: Start accepts. Automaton has 17082 states and 23495 transitions. Word has length 94 [2020-12-22 13:11:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:59,595 INFO L481 AbstractCegarLoop]: Abstraction has 17082 states and 23495 transitions. [2020-12-22 13:11:59,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17082 states and 23495 transitions. [2020-12-22 13:11:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 13:11:59,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:59,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:59,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:11:59,608 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:59,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1253965201, now seen corresponding path program 1 times [2020-12-22 13:11:59,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:59,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405089790] [2020-12-22 13:11:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:11:59,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405089790] [2020-12-22 13:11:59,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393618914] [2020-12-22 13:11:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:12:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:12:00,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:00,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 13:12:00,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265869305] [2020-12-22 13:12:00,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:00,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:00,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:12:00,659 INFO L87 Difference]: Start difference. First operand 17082 states and 23495 transitions. Second operand 3 states. [2020-12-22 13:12:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:02,164 INFO L93 Difference]: Finished difference Result 26023 states and 35780 transitions. [2020-12-22 13:12:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:02,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 13:12:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:02,190 INFO L225 Difference]: With dead ends: 26023 [2020-12-22 13:12:02,190 INFO L226 Difference]: Without dead ends: 9205 [2020-12-22 13:12:02,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:12:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9205 states. [2020-12-22 13:12:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9205 to 9176. [2020-12-22 13:12:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9176 states. [2020-12-22 13:12:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 12492 transitions. [2020-12-22 13:12:03,255 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 12492 transitions. Word has length 95 [2020-12-22 13:12:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:03,256 INFO L481 AbstractCegarLoop]: Abstraction has 9176 states and 12492 transitions. [2020-12-22 13:12:03,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 12492 transitions. [2020-12-22 13:12:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 13:12:03,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:03,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:03,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:03,483 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 704154339, now seen corresponding path program 2 times [2020-12-22 13:12:03,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:03,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391502897] [2020-12-22 13:12:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:12:03,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391502897] [2020-12-22 13:12:03,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129345438] [2020-12-22 13:12:03,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:06,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:12:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:12:06,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:12:06,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 13:12:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660840465] [2020-12-22 13:12:06,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:12:06,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:12:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:12:06,433 INFO L87 Difference]: Start difference. First operand 9176 states and 12492 transitions. Second operand 12 states. [2020-12-22 13:12:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:07,173 INFO L93 Difference]: Finished difference Result 18411 states and 25065 transitions. [2020-12-22 13:12:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:12:07,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-12-22 13:12:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:07,197 INFO L225 Difference]: With dead ends: 18411 [2020-12-22 13:12:07,197 INFO L226 Difference]: Without dead ends: 9248 [2020-12-22 13:12:07,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:12:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2020-12-22 13:12:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 9224. [2020-12-22 13:12:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9224 states. [2020-12-22 13:12:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 12540 transitions. [2020-12-22 13:12:07,719 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 12540 transitions. Word has length 95 [2020-12-22 13:12:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:07,719 INFO L481 AbstractCegarLoop]: Abstraction has 9224 states and 12540 transitions. [2020-12-22 13:12:07,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:12:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 12540 transitions. [2020-12-22 13:12:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 13:12:07,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:07,726 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:07,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 13:12:07,940 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 194662559, now seen corresponding path program 3 times [2020-12-22 13:12:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:07,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284709971] [2020-12-22 13:12:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:12:08,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284709971] [2020-12-22 13:12:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055658337] [2020-12-22 13:12:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:11,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:12:11,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 13:12:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-22 13:12:11,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:11,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2020-12-22 13:12:11,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284384690] [2020-12-22 13:12:11,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:12:11,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:11,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:12:11,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:12:11,886 INFO L87 Difference]: Start difference. First operand 9224 states and 12540 transitions. Second operand 10 states. [2020-12-22 13:12:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:21,038 INFO L93 Difference]: Finished difference Result 49311 states and 65765 transitions. [2020-12-22 13:12:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 13:12:21,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-12-22 13:12:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:21,133 INFO L225 Difference]: With dead ends: 49311 [2020-12-22 13:12:21,133 INFO L226 Difference]: Without dead ends: 39992 [2020-12-22 13:12:21,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 13:12:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39992 states. [2020-12-22 13:12:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39992 to 12737. [2020-12-22 13:12:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12737 states. [2020-12-22 13:12:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12737 states to 12737 states and 17357 transitions. [2020-12-22 13:12:22,412 INFO L78 Accepts]: Start accepts. Automaton has 12737 states and 17357 transitions. Word has length 97 [2020-12-22 13:12:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:22,413 INFO L481 AbstractCegarLoop]: Abstraction has 12737 states and 17357 transitions. [2020-12-22 13:12:22,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:12:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12737 states and 17357 transitions. [2020-12-22 13:12:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 13:12:22,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:22,423 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:22,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 13:12:22,624 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -697196600, now seen corresponding path program 1 times [2020-12-22 13:12:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:22,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096506695] [2020-12-22 13:12:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:12:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096506695] [2020-12-22 13:12:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748472550] [2020-12-22 13:12:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:12:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:12:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 13:12:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463929545] [2020-12-22 13:12:23,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:12:23,825 INFO L87 Difference]: Start difference. First operand 12737 states and 17357 transitions. Second operand 3 states. [2020-12-22 13:12:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:24,896 INFO L93 Difference]: Finished difference Result 23644 states and 32583 transitions. [2020-12-22 13:12:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:24,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 13:12:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:24,945 INFO L225 Difference]: With dead ends: 23644 [2020-12-22 13:12:24,945 INFO L226 Difference]: Without dead ends: 17538 [2020-12-22 13:12:24,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:12:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17538 states. [2020-12-22 13:12:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17538 to 17525. [2020-12-22 13:12:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17525 states. [2020-12-22 13:12:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17525 states to 17525 states and 24194 transitions. [2020-12-22 13:12:26,386 INFO L78 Accepts]: Start accepts. Automaton has 17525 states and 24194 transitions. Word has length 98 [2020-12-22 13:12:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:26,386 INFO L481 AbstractCegarLoop]: Abstraction has 17525 states and 24194 transitions. [2020-12-22 13:12:26,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17525 states and 24194 transitions. [2020-12-22 13:12:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 13:12:26,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:26,395 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:26,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 13:12:26,609 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash -141244918, now seen corresponding path program 1 times [2020-12-22 13:12:26,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:26,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291961652] [2020-12-22 13:12:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:12:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291961652] [2020-12-22 13:12:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370175755] [2020-12-22 13:12:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:12:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:12:27,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:27,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:12:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662156772] [2020-12-22 13:12:27,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:12:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:12:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:27,472 INFO L87 Difference]: Start difference. First operand 17525 states and 24194 transitions. Second operand 3 states. [2020-12-22 13:12:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:29,415 INFO L93 Difference]: Finished difference Result 32757 states and 45515 transitions. [2020-12-22 13:12:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:12:29,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 13:12:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:29,465 INFO L225 Difference]: With dead ends: 32757 [2020-12-22 13:12:29,465 INFO L226 Difference]: Without dead ends: 16971 [2020-12-22 13:12:29,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16971 states. [2020-12-22 13:12:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16971 to 16966. [2020-12-22 13:12:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16966 states. [2020-12-22 13:12:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16966 states to 16966 states and 23427 transitions. [2020-12-22 13:12:30,610 INFO L78 Accepts]: Start accepts. Automaton has 16966 states and 23427 transitions. Word has length 100 [2020-12-22 13:12:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:30,611 INFO L481 AbstractCegarLoop]: Abstraction has 16966 states and 23427 transitions. [2020-12-22 13:12:30,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:12:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 16966 states and 23427 transitions. [2020-12-22 13:12:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 13:12:30,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:30,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:30,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:30,827 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1946683252, now seen corresponding path program 1 times [2020-12-22 13:12:30,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:30,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326603807] [2020-12-22 13:12:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:12:30,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326603807] [2020-12-22 13:12:30,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:30,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:12:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014046940] [2020-12-22 13:12:30,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:12:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:12:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:12:30,992 INFO L87 Difference]: Start difference. First operand 16966 states and 23427 transitions. Second operand 4 states. [2020-12-22 13:12:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:33,194 INFO L93 Difference]: Finished difference Result 44151 states and 61023 transitions. [2020-12-22 13:12:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:12:33,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-12-22 13:12:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:33,262 INFO L225 Difference]: With dead ends: 44151 [2020-12-22 13:12:33,262 INFO L226 Difference]: Without dead ends: 29460 [2020-12-22 13:12:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:12:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29460 states. [2020-12-22 13:12:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29460 to 17002. [2020-12-22 13:12:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17002 states. [2020-12-22 13:12:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17002 states to 17002 states and 23463 transitions. [2020-12-22 13:12:34,731 INFO L78 Accepts]: Start accepts. Automaton has 17002 states and 23463 transitions. Word has length 100 [2020-12-22 13:12:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:34,732 INFO L481 AbstractCegarLoop]: Abstraction has 17002 states and 23463 transitions. [2020-12-22 13:12:34,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:12:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 17002 states and 23463 transitions. [2020-12-22 13:12:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 13:12:34,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:34,741 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:34,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 13:12:34,741 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash 818254937, now seen corresponding path program 1 times [2020-12-22 13:12:34,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:34,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698495353] [2020-12-22 13:12:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:12:34,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698495353] [2020-12-22 13:12:34,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402331392] [2020-12-22 13:12:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:12:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:12:35,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:35,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:12:35,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992580036] [2020-12-22 13:12:35,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:12:35,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:35,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:12:35,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:12:35,724 INFO L87 Difference]: Start difference. First operand 17002 states and 23463 transitions. Second operand 6 states. [2020-12-22 13:12:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:37,160 INFO L93 Difference]: Finished difference Result 34109 states and 47147 transitions. [2020-12-22 13:12:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:12:37,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-12-22 13:12:37,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:37,192 INFO L225 Difference]: With dead ends: 34109 [2020-12-22 13:12:37,192 INFO L226 Difference]: Without dead ends: 17120 [2020-12-22 13:12:37,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:12:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17120 states. [2020-12-22 13:12:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17120 to 17120. [2020-12-22 13:12:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17120 states. [2020-12-22 13:12:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17120 states to 17120 states and 23581 transitions. [2020-12-22 13:12:38,443 INFO L78 Accepts]: Start accepts. Automaton has 17120 states and 23581 transitions. Word has length 101 [2020-12-22 13:12:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:38,443 INFO L481 AbstractCegarLoop]: Abstraction has 17120 states and 23581 transitions. [2020-12-22 13:12:38,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:12:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 17120 states and 23581 transitions. [2020-12-22 13:12:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 13:12:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:38,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:38,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 13:12:38,666 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1451285359, now seen corresponding path program 2 times [2020-12-22 13:12:38,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:38,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150382821] [2020-12-22 13:12:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:12:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150382821] [2020-12-22 13:12:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537889755] [2020-12-22 13:12:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:41,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:12:41,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:12:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:12:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:12:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490848564] [2020-12-22 13:12:41,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:12:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:12:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:12:41,562 INFO L87 Difference]: Start difference. First operand 17120 states and 23581 transitions. Second operand 8 states. [2020-12-22 13:12:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:42,872 INFO L93 Difference]: Finished difference Result 34345 states and 47383 transitions. [2020-12-22 13:12:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:12:42,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-12-22 13:12:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:42,905 INFO L225 Difference]: With dead ends: 34345 [2020-12-22 13:12:42,905 INFO L226 Difference]: Without dead ends: 17238 [2020-12-22 13:12:42,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:12:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2020-12-22 13:12:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 17238. [2020-12-22 13:12:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17238 states. [2020-12-22 13:12:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17238 states to 17238 states and 23699 transitions. [2020-12-22 13:12:44,168 INFO L78 Accepts]: Start accepts. Automaton has 17238 states and 23699 transitions. Word has length 102 [2020-12-22 13:12:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:44,169 INFO L481 AbstractCegarLoop]: Abstraction has 17238 states and 23699 transitions. [2020-12-22 13:12:44,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:12:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 17238 states and 23699 transitions. [2020-12-22 13:12:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 13:12:44,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:44,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:44,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 13:12:44,391 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -399608039, now seen corresponding path program 3 times [2020-12-22 13:12:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:44,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850527712] [2020-12-22 13:12:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:12:44,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850527712] [2020-12-22 13:12:44,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045247794] [2020-12-22 13:12:44,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:48,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:12:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:48,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 13:12:48,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 13:12:49,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:49,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2020-12-22 13:12:49,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702163333] [2020-12-22 13:12:49,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:12:49,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:12:49,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:12:49,089 INFO L87 Difference]: Start difference. First operand 17238 states and 23699 transitions. Second operand 10 states. [2020-12-22 13:13:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:04,836 INFO L93 Difference]: Finished difference Result 105056 states and 141226 transitions. [2020-12-22 13:13:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 13:13:04,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-12-22 13:13:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:05,061 INFO L225 Difference]: With dead ends: 105056 [2020-12-22 13:13:05,061 INFO L226 Difference]: Without dead ends: 90079 [2020-12-22 13:13:05,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1044, Invalid=4506, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 13:13:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90079 states. [2020-12-22 13:13:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90079 to 25502. [2020-12-22 13:13:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25502 states. [2020-12-22 13:13:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 35090 transitions. [2020-12-22 13:13:08,065 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 35090 transitions. Word has length 103 [2020-12-22 13:13:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:08,065 INFO L481 AbstractCegarLoop]: Abstraction has 25502 states and 35090 transitions. [2020-12-22 13:13:08,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:13:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 35090 transitions. [2020-12-22 13:13:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 13:13:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:08,073 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:08,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:08,276 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -746468658, now seen corresponding path program 1 times [2020-12-22 13:13:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:08,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344268481] [2020-12-22 13:13:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:13:08,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344268481] [2020-12-22 13:13:08,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975407948] [2020-12-22 13:13:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:13:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:13:09,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:09,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 13:13:09,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354345368] [2020-12-22 13:13:09,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 13:13:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 13:13:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:13:09,311 INFO L87 Difference]: Start difference. First operand 25502 states and 35090 transitions. Second operand 13 states. [2020-12-22 13:13:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:11,692 INFO L93 Difference]: Finished difference Result 51071 states and 70285 transitions. [2020-12-22 13:13:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 13:13:11,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 106 [2020-12-22 13:13:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:11,741 INFO L225 Difference]: With dead ends: 51071 [2020-12-22 13:13:11,742 INFO L226 Difference]: Without dead ends: 25582 [2020-12-22 13:13:11,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:13:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25582 states. [2020-12-22 13:13:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25582 to 25582. [2020-12-22 13:13:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25582 states. [2020-12-22 13:13:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25582 states to 25582 states and 35170 transitions. [2020-12-22 13:13:14,031 INFO L78 Accepts]: Start accepts. Automaton has 25582 states and 35170 transitions. Word has length 106 [2020-12-22 13:13:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:14,031 INFO L481 AbstractCegarLoop]: Abstraction has 25582 states and 35170 transitions. [2020-12-22 13:13:14,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 13:13:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25582 states and 35170 transitions. [2020-12-22 13:13:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 13:13:14,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:14,041 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:14,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 13:13:14,249 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1376233582, now seen corresponding path program 2 times [2020-12-22 13:13:14,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:14,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77094287] [2020-12-22 13:13:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-22 13:13:14,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77094287] [2020-12-22 13:13:14,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:13:14,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:13:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208117665] [2020-12-22 13:13:14,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:13:14,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:13:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:13:14,426 INFO L87 Difference]: Start difference. First operand 25582 states and 35170 transitions. Second operand 4 states. [2020-12-22 13:13:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:18,205 INFO L93 Difference]: Finished difference Result 61382 states and 83988 transitions. [2020-12-22 13:13:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:13:18,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-12-22 13:13:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:18,279 INFO L225 Difference]: With dead ends: 61382 [2020-12-22 13:13:18,280 INFO L226 Difference]: Without dead ends: 35733 [2020-12-22 13:13:18,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:13:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35733 states. [2020-12-22 13:13:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35733 to 25582. [2020-12-22 13:13:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25582 states. [2020-12-22 13:13:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25582 states to 25582 states and 35130 transitions. [2020-12-22 13:13:20,970 INFO L78 Accepts]: Start accepts. Automaton has 25582 states and 35130 transitions. Word has length 108 [2020-12-22 13:13:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:20,970 INFO L481 AbstractCegarLoop]: Abstraction has 25582 states and 35130 transitions. [2020-12-22 13:13:20,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:13:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 25582 states and 35130 transitions. [2020-12-22 13:13:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:13:20,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:20,982 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:20,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 13:13:20,983 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1250300301, now seen corresponding path program 1 times [2020-12-22 13:13:20,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:20,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536931433] [2020-12-22 13:13:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:13:21,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536931433] [2020-12-22 13:13:21,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538783571] [2020-12-22 13:13:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:21,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:13:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:13:22,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:22,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:13:22,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768091095] [2020-12-22 13:13:22,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:13:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:13:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:13:22,011 INFO L87 Difference]: Start difference. First operand 25582 states and 35130 transitions. Second operand 10 states. [2020-12-22 13:13:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:24,381 INFO L93 Difference]: Finished difference Result 51334 states and 70611 transitions. [2020-12-22 13:13:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:13:24,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-12-22 13:13:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:24,436 INFO L225 Difference]: With dead ends: 51334 [2020-12-22 13:13:24,436 INFO L226 Difference]: Without dead ends: 25765 [2020-12-22 13:13:24,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:13:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25765 states. [2020-12-22 13:13:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25765 to 25765. [2020-12-22 13:13:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25765 states. [2020-12-22 13:13:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25765 states to 25765 states and 35313 transitions. [2020-12-22 13:13:26,959 INFO L78 Accepts]: Start accepts. Automaton has 25765 states and 35313 transitions. Word has length 109 [2020-12-22 13:13:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:26,959 INFO L481 AbstractCegarLoop]: Abstraction has 25765 states and 35313 transitions. [2020-12-22 13:13:26,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:13:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 25765 states and 35313 transitions. [2020-12-22 13:13:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 13:13:26,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:26,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:27,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:27,187 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1038869155, now seen corresponding path program 2 times [2020-12-22 13:13:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:27,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050886422] [2020-12-22 13:13:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:13:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050886422] [2020-12-22 13:13:27,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:13:27,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:13:27,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627961393] [2020-12-22 13:13:27,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:13:27,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:13:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:13:27,366 INFO L87 Difference]: Start difference. First operand 25765 states and 35313 transitions. Second operand 3 states. [2020-12-22 13:13:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:30,298 INFO L93 Difference]: Finished difference Result 51700 states and 70977 transitions. [2020-12-22 13:13:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:13:30,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 13:13:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:30,352 INFO L225 Difference]: With dead ends: 51700 [2020-12-22 13:13:30,352 INFO L226 Difference]: Without dead ends: 25948 [2020-12-22 13:13:30,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:13:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25948 states. [2020-12-22 13:13:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25948 to 25948. [2020-12-22 13:13:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25948 states. [2020-12-22 13:13:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25948 states to 25948 states and 35496 transitions. [2020-12-22 13:13:32,695 INFO L78 Accepts]: Start accepts. Automaton has 25948 states and 35496 transitions. Word has length 110 [2020-12-22 13:13:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:32,695 INFO L481 AbstractCegarLoop]: Abstraction has 25948 states and 35496 transitions. [2020-12-22 13:13:32,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:13:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25948 states and 35496 transitions. [2020-12-22 13:13:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 13:13:32,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:32,704 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:32,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 13:13:32,705 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1690380302, now seen corresponding path program 1 times [2020-12-22 13:13:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:32,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956642883] [2020-12-22 13:13:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-22 13:13:33,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956642883] [2020-12-22 13:13:33,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:13:33,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 13:13:33,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386883303] [2020-12-22 13:13:33,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:13:33,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:13:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:13:33,689 INFO L87 Difference]: Start difference. First operand 25948 states and 35496 transitions. Second operand 11 states. [2020-12-22 13:13:41,470 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-12-22 13:13:42,018 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-22 13:13:44,536 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 13:13:44,935 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 13:13:45,547 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-12-22 13:14:02,730 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 13:14:02,869 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 13:14:04,198 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43