/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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:15:15,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:15:15,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:15:15,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:15:15,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:15:15,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:15:15,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:15:15,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:15:15,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:15:15,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:15:15,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:15:15,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:15:15,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:15:15,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:15:15,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:15:15,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:15:15,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:15:15,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:15:15,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:15:15,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:15:15,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:15:15,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:15:15,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:15:15,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:15:15,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:15:15,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:15:15,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:15:15,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:15:15,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:15:15,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:15:15,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:15:15,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:15:15,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:15:15,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:15:15,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:15:15,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:15:15,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:15:15,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:15:15,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:15:15,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:15:15,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:15:15,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:15:15,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:15:15,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:15:15,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:15:15,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:15:15,678 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:15:15,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:15:15,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:15:15,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:15:15,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:15:15,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:15:15,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:15:15,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:15:15,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:15:15,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:15:15,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:15:15,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:15:15,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:15:15,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:15:15,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:15:15,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:15:15,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:15:15,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:15:15,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:15:15,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:15:15,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:15:15,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:15:16,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:15:16,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:15:16,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:15:16,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:15:16,211 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:15:16,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i [2020-12-22 13:15:16,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20e68037/cfebd010b77b43af88bdc2d259fc58ae/FLAGf73e03b04 [2020-12-22 13:15:17,387 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:15:17,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i [2020-12-22 13:15:17,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20e68037/cfebd010b77b43af88bdc2d259fc58ae/FLAGf73e03b04 [2020-12-22 13:15:17,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e20e68037/cfebd010b77b43af88bdc2d259fc58ae [2020-12-22 13:15:17,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:15:17,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:15:17,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:17,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:15:17,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:15:17,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:17" (1/1) ... [2020-12-22 13:15:17,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f6d105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:17, skipping insertion in model container [2020-12-22 13:15:17,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:17" (1/1) ... [2020-12-22 13:15:17,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:15:18,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:15:19,405 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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i[164502,164515] [2020-12-22 13:15:20,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:20,944 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:15:21,212 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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i[164502,164515] [2020-12-22 13:15:21,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:21,973 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:15:21,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21 WrapperNode [2020-12-22 13:15:21,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:21,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:21,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:15:21,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:15:21,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:22,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:22,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:22,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:15:22,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:15:22,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:15:22,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:22,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:23,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:23,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:23,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:24,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:24,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (1/1) ... [2020-12-22 13:15:24,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:15:24,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:15:24,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:15:24,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:15:24,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (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 13:15:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:15:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:15:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:15:24,337 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:15:24,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:15:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:15:24,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:15:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:15:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:15:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:15:24,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:15:24,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:16:49,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:16:49,551 INFO L299 CfgBuilder]: Removed 3578 assume(true) statements. [2020-12-22 13:16:49,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:49 BoogieIcfgContainer [2020-12-22 13:16:49,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:16:49,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:16:49,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:16:49,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:16:49,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:15:17" (1/3) ... [2020-12-22 13:16:49,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43423c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:49, skipping insertion in model container [2020-12-22 13:16:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:21" (2/3) ... [2020-12-22 13:16:49,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43423c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:49, skipping insertion in model container [2020-12-22 13:16:49,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:49" (3/3) ... [2020-12-22 13:16:49,573 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8851.ko-entry_point.cil.out.i [2020-12-22 13:16:49,581 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:16:49,591 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:16:49,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:16:49,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:16:49,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:16:49,671 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:16:49,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:16:49,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:16:49,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:16:49,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:16:49,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:16:49,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states. [2020-12-22 13:16:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 13:16:49,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:49,767 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, 1] [2020-12-22 13:16:49,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1722579056, now seen corresponding path program 1 times [2020-12-22 13:16:49,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:49,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274331040] [2020-12-22 13:16:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:50,711 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 13:16:50,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274331040] [2020-12-22 13:16:50,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:50,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015709823] [2020-12-22 13:16:50,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:50,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:50,738 INFO L87 Difference]: Start difference. First operand 4082 states. Second operand 3 states. [2020-12-22 13:16:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:53,549 INFO L93 Difference]: Finished difference Result 12063 states and 17238 transitions. [2020-12-22 13:16:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:53,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-22 13:16:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:53,638 INFO L225 Difference]: With dead ends: 12063 [2020-12-22 13:16:53,639 INFO L226 Difference]: Without dead ends: 7950 [2020-12-22 13:16:53,663 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 13:16:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2020-12-22 13:16:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7950. [2020-12-22 13:16:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7950 states. [2020-12-22 13:16:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 11097 transitions. [2020-12-22 13:16:54,051 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 11097 transitions. Word has length 29 [2020-12-22 13:16:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:54,052 INFO L481 AbstractCegarLoop]: Abstraction has 7950 states and 11097 transitions. [2020-12-22 13:16:54,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 11097 transitions. [2020-12-22 13:16:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 13:16:54,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:54,063 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, 1, 1, 1, 1] [2020-12-22 13:16:54,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:16:54,064 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash 680382544, now seen corresponding path program 1 times [2020-12-22 13:16:54,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594430103] [2020-12-22 13:16:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:54,637 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 13:16:54,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594430103] [2020-12-22 13:16:54,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:54,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:16:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313107942] [2020-12-22 13:16:54,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:16:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:16:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:54,642 INFO L87 Difference]: Start difference. First operand 7950 states and 11097 transitions. Second operand 5 states. [2020-12-22 13:16:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:55,947 INFO L93 Difference]: Finished difference Result 23734 states and 33164 transitions. [2020-12-22 13:16:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:55,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-22 13:16:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:56,063 INFO L225 Difference]: With dead ends: 23734 [2020-12-22 13:16:56,064 INFO L226 Difference]: Without dead ends: 15836 [2020-12-22 13:16:56,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:16:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15836 states. [2020-12-22 13:16:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15836 to 15740. [2020-12-22 13:16:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2020-12-22 13:16:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 21993 transitions. [2020-12-22 13:16:56,928 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 21993 transitions. Word has length 32 [2020-12-22 13:16:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:56,930 INFO L481 AbstractCegarLoop]: Abstraction has 15740 states and 21993 transitions. [2020-12-22 13:16:56,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:16:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 21993 transitions. [2020-12-22 13:16:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 13:16:56,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:56,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:56,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:16:56,963 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1708768980, now seen corresponding path program 1 times [2020-12-22 13:16:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:56,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132852048] [2020-12-22 13:16:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:16:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132852048] [2020-12-22 13:16:57,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:57,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:57,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221619871] [2020-12-22 13:16:57,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:57,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:57,551 INFO L87 Difference]: Start difference. First operand 15740 states and 21993 transitions. Second operand 3 states. [2020-12-22 13:16:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:58,741 INFO L93 Difference]: Finished difference Result 44306 states and 61917 transitions. [2020-12-22 13:16:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:58,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 13:16:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:58,854 INFO L225 Difference]: With dead ends: 44306 [2020-12-22 13:16:58,854 INFO L226 Difference]: Without dead ends: 28623 [2020-12-22 13:16:58,891 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 13:16:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28623 states. [2020-12-22 13:16:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28623 to 27508. [2020-12-22 13:16:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27508 states. [2020-12-22 13:17:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27508 states to 27508 states and 38476 transitions. [2020-12-22 13:17:00,024 INFO L78 Accepts]: Start accepts. Automaton has 27508 states and 38476 transitions. Word has length 117 [2020-12-22 13:17:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:00,025 INFO L481 AbstractCegarLoop]: Abstraction has 27508 states and 38476 transitions. [2020-12-22 13:17:00,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27508 states and 38476 transitions. [2020-12-22 13:17:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:17:00,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:00,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:00,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:17:00,051 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 410986585, now seen corresponding path program 1 times [2020-12-22 13:17:00,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:00,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239326734] [2020-12-22 13:17:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:00,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239326734] [2020-12-22 13:17:00,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:00,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:00,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272456388] [2020-12-22 13:17:00,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:00,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:00,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:00,487 INFO L87 Difference]: Start difference. First operand 27508 states and 38476 transitions. Second operand 3 states. [2020-12-22 13:17:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:02,252 INFO L93 Difference]: Finished difference Result 76250 states and 106840 transitions. [2020-12-22 13:17:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:02,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 13:17:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:02,395 INFO L225 Difference]: With dead ends: 76250 [2020-12-22 13:17:02,396 INFO L226 Difference]: Without dead ends: 48799 [2020-12-22 13:17:02,473 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 13:17:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48799 states. [2020-12-22 13:17:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48799 to 48640. [2020-12-22 13:17:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48640 states. [2020-12-22 13:17:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48640 states to 48640 states and 68244 transitions. [2020-12-22 13:17:04,573 INFO L78 Accepts]: Start accepts. Automaton has 48640 states and 68244 transitions. Word has length 125 [2020-12-22 13:17:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:04,573 INFO L481 AbstractCegarLoop]: Abstraction has 48640 states and 68244 transitions. [2020-12-22 13:17:04,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 48640 states and 68244 transitions. [2020-12-22 13:17:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:17:04,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:04,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:04,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:17:04,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash -491023878, now seen corresponding path program 1 times [2020-12-22 13:17:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:04,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632359548] [2020-12-22 13:17:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:17:05,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632359548] [2020-12-22 13:17:05,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:05,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:05,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140006905] [2020-12-22 13:17:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:05,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:05,093 INFO L87 Difference]: Start difference. First operand 48640 states and 68244 transitions. Second operand 4 states. [2020-12-22 13:17:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:09,203 INFO L93 Difference]: Finished difference Result 207772 states and 291264 transitions. [2020-12-22 13:17:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:09,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-12-22 13:17:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:09,785 INFO L225 Difference]: With dead ends: 207772 [2020-12-22 13:17:09,786 INFO L226 Difference]: Without dead ends: 159189 [2020-12-22 13:17:09,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159189 states. [2020-12-22 13:17:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159189 to 81464. [2020-12-22 13:17:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81464 states. [2020-12-22 13:17:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81464 states to 81464 states and 114186 transitions. [2020-12-22 13:17:13,993 INFO L78 Accepts]: Start accepts. Automaton has 81464 states and 114186 transitions. Word has length 144 [2020-12-22 13:17:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 81464 states and 114186 transitions. [2020-12-22 13:17:13,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 81464 states and 114186 transitions. [2020-12-22 13:17:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 13:17:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:14,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:14,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:17:14,057 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:14,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1969985934, now seen corresponding path program 1 times [2020-12-22 13:17:14,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:14,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685828582] [2020-12-22 13:17:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:17:14,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685828582] [2020-12-22 13:17:14,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:14,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:14,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752498160] [2020-12-22 13:17:14,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:14,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:14,626 INFO L87 Difference]: Start difference. First operand 81464 states and 114186 transitions. Second operand 4 states. [2020-12-22 13:17:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:22,886 INFO L93 Difference]: Finished difference Result 371876 states and 520974 transitions. [2020-12-22 13:17:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:22,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 13:17:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:23,859 INFO L225 Difference]: With dead ends: 371876 [2020-12-22 13:17:23,859 INFO L226 Difference]: Without dead ends: 290469 [2020-12-22 13:17:24,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290469 states. [2020-12-22 13:17:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290469 to 158960. [2020-12-22 13:17:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158960 states. [2020-12-22 13:17:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158960 states to 158960 states and 222734 transitions. [2020-12-22 13:17:30,917 INFO L78 Accepts]: Start accepts. Automaton has 158960 states and 222734 transitions. Word has length 145 [2020-12-22 13:17:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:30,918 INFO L481 AbstractCegarLoop]: Abstraction has 158960 states and 222734 transitions. [2020-12-22 13:17:30,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 158960 states and 222734 transitions. [2020-12-22 13:17:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:17:30,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:30,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:30,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:17:30,960 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash 951241694, now seen corresponding path program 1 times [2020-12-22 13:17:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:30,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406437334] [2020-12-22 13:17:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:17:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406437334] [2020-12-22 13:17:31,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:31,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:31,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446434303] [2020-12-22 13:17:31,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:31,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:31,309 INFO L87 Difference]: Start difference. First operand 158960 states and 222734 transitions. Second operand 4 states. [2020-12-22 13:17:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:45,933 INFO L93 Difference]: Finished difference Result 731900 states and 1025034 transitions. [2020-12-22 13:17:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:45,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 13:17:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:47,791 INFO L225 Difference]: With dead ends: 731900 [2020-12-22 13:17:47,791 INFO L226 Difference]: Without dead ends: 572997 [2020-12-22 13:17:48,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572997 states. [2020-12-22 13:17:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572997 to 310072. [2020-12-22 13:17:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310072 states. [2020-12-22 13:17:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310072 states to 310072 states and 434318 transitions. [2020-12-22 13:17:59,785 INFO L78 Accepts]: Start accepts. Automaton has 310072 states and 434318 transitions. Word has length 146 [2020-12-22 13:17:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:59,786 INFO L481 AbstractCegarLoop]: Abstraction has 310072 states and 434318 transitions. [2020-12-22 13:17:59,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 310072 states and 434318 transitions. [2020-12-22 13:17:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 13:17:59,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:59,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:59,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:17:59,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1725334958, now seen corresponding path program 1 times [2020-12-22 13:17:59,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:59,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454541524] [2020-12-22 13:17:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:18:00,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454541524] [2020-12-22 13:18:00,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:00,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:18:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043620816] [2020-12-22 13:18:00,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:00,189 INFO L87 Difference]: Start difference. First operand 310072 states and 434318 transitions. Second operand 4 states. [2020-12-22 13:18:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:34,497 INFO L93 Difference]: Finished difference Result 1440244 states and 2016490 transitions. [2020-12-22 13:18:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:34,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-12-22 13:18:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:38,576 INFO L225 Difference]: With dead ends: 1440244 [2020-12-22 13:18:38,577 INFO L226 Difference]: Without dead ends: 1130229