/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:10:16,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:10:16,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:10:16,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:10:16,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:10:16,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:10:16,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:10:16,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:10:16,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:10:16,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:10:16,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:10:16,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:10:16,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:10:16,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:10:16,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:10:16,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:10:16,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:10:16,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:10:16,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:10:16,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:10:16,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:10:16,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:10:16,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:10:16,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:10:16,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 00:10:16,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 00:10:16,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 00:10:16,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 00:10:16,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 00:10:16,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 00:10:16,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 00:10:16,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 00:10:16,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 00:10:16,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 00:10:16,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 00:10:16,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 00:10:16,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 00:10:16,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 00:10:16,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:10:16,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:10:16,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:10:16,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:10:16,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:10:16,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:10:16,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:10:16,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:10:16,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:10:16,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:10:16,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:10:16,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:10:16,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:10:16,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:10:16,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:10:16,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:10:16,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:10:16,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:10:16,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:10:16,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:10:16,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:10:16,537 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:10:16,537 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:10:16,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:10:16,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:10:16,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:10:16,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:10:16,757 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:10:16,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2022-01-11 00:10:16,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc276687a/935fb89eee634d10a5a9443915b5119f/FLAGeeee65ae3 [2022-01-11 00:10:17,126 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:10:17,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2022-01-11 00:10:17,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc276687a/935fb89eee634d10a5a9443915b5119f/FLAGeeee65ae3 [2022-01-11 00:10:17,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc276687a/935fb89eee634d10a5a9443915b5119f [2022-01-11 00:10:17,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:10:17,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:10:17,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:10:17,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:10:17,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:10:17,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0268b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17, skipping insertion in model container [2022-01-11 00:10:17,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:10:17,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:10:17,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c[1008,1021] [2022-01-11 00:10:17,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:10:17,749 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:10:17,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c[1008,1021] [2022-01-11 00:10:17,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:10:17,777 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:10:17,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17 WrapperNode [2022-01-11 00:10:17,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:10:17,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:10:17,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:10:17,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:10:17,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,802 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-11 00:10:17,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:10:17,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:10:17,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:10:17,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:10:17,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:10:17,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:10:17,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:10:17,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:10:17,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (1/1) ... [2022-01-11 00:10:17,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:10:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:17,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 00:10:17,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 00:10:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:10:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-01-11 00:10:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-01-11 00:10:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:10:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:10:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:10:17,940 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:10:17,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:10:18,099 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:10:18,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:10:18,104 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:10:18,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:18 BoogieIcfgContainer [2022-01-11 00:10:18,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:10:18,113 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:10:18,113 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:10:18,114 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:10:18,116 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:18" (1/1) ... [2022-01-11 00:10:18,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:10:18 BasicIcfg [2022-01-11 00:10:18,184 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:10:18,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:10:18,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:10:18,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:10:18,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:10:17" (1/4) ... [2022-01-11 00:10:18,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127b6e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:10:18, skipping insertion in model container [2022-01-11 00:10:18,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:17" (2/4) ... [2022-01-11 00:10:18,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127b6e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:10:18, skipping insertion in model container [2022-01-11 00:10:18,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:18" (3/4) ... [2022-01-11 00:10:18,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127b6e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:10:18, skipping insertion in model container [2022-01-11 00:10:18,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:10:18" (4/4) ... [2022-01-11 00:10:18,203 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.cTransformedIcfg [2022-01-11 00:10:18,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:10:18,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:10:18,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:10:18,275 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 00:10:18,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:10:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:10:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 00:10:18,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:18,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:18,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2034335964, now seen corresponding path program 1 times [2022-01-11 00:10:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768152774] [2022-01-11 00:10:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:18,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:10:18,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:18,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768152774] [2022-01-11 00:10:18,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768152774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:10:18,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:10:18,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 00:10:18,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331242780] [2022-01-11 00:10:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:10:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 00:10:18,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 00:10:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:10:18,747 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:18,854 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-11 00:10:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 00:10:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-11 00:10:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:18,867 INFO L225 Difference]: With dead ends: 37 [2022-01-11 00:10:18,867 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 00:10:18,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-11 00:10:18,875 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:18,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:10:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 00:10:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 00:10:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:10:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-01-11 00:10:18,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-01-11 00:10:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:18,913 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-01-11 00:10:18,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-01-11 00:10:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-11 00:10:18,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:18,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:10:18,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -453556407, now seen corresponding path program 1 times [2022-01-11 00:10:18,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588305824] [2022-01-11 00:10:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:18,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:10:19,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588305824] [2022-01-11 00:10:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588305824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:10:19,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:10:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 00:10:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109892610] [2022-01-11 00:10:19,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:10:19,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 00:10:19,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 00:10:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-11 00:10:19,099 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:19,209 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-11 00:10:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:10:19,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-11 00:10:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:19,212 INFO L225 Difference]: With dead ends: 27 [2022-01-11 00:10:19,212 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 00:10:19,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-11 00:10:19,217 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:19,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:10:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 00:10:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-11 00:10:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:10:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-01-11 00:10:19,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2022-01-11 00:10:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:19,242 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-01-11 00:10:19,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-01-11 00:10:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 00:10:19,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:19,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:19,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:10:19,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash -881492504, now seen corresponding path program 1 times [2022-01-11 00:10:19,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:19,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095235516] [2022-01-11 00:10:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:19,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:10:19,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095235516] [2022-01-11 00:10:19,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095235516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074635232] [2022-01-11 00:10:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:19,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:19,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:10:19,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:10:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-11 00:10:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:10:21,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:10:34,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074635232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:34,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:34,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-11 00:10:34,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751320808] [2022-01-11 00:10:34,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:34,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 00:10:34,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 00:10:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:10:34,767 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 24 states, 18 states have (on average 2.0) internal successors, (36), 24 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-11 00:10:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:37,170 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-01-11 00:10:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:10:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.0) internal successors, (36), 24 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 20 [2022-01-11 00:10:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:37,171 INFO L225 Difference]: With dead ends: 33 [2022-01-11 00:10:37,171 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 00:10:37,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-01-11 00:10:37,173 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:37,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 75 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 00:10:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 00:10:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-11 00:10:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-11 00:10:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-11 00:10:37,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-01-11 00:10:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:37,177 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-11 00:10:37,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.0) internal successors, (36), 24 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-11 00:10:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-11 00:10:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 00:10:37,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:37,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:37,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 00:10:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:37,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1633228312, now seen corresponding path program 1 times [2022-01-11 00:10:37,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575617927] [2022-01-11 00:10:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:37,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:37,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 00:10:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:10:37,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575617927] [2022-01-11 00:10:37,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575617927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359136072] [2022-01-11 00:10:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:37,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:37,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:10:37,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:10:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-11 00:10:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:10:43,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:49,919 WARN L228 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 269] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-01-11 00:10:54,965 WARN L228 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-01-11 00:11:00,521 WARN L228 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 269] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-01-11 00:11:23,244 WARN L228 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)