/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_LAZY.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:20:29,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:20:29,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:20:29,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:20:29,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:20:29,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:20:29,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:20:29,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:20:29,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:20:29,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:20:29,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:20:29,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:20:29,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:20:29,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:20:29,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:20:29,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:20:29,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:20:29,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:20:29,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:20:29,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:20:29,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:20:29,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:20:29,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:20:29,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:20:29,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:20:29,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:20:29,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:20:29,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:20:29,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:20:29,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:20:29,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:20:29,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:20:29,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:20:29,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:20:29,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:20:29,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:20:29,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:20:29,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:20:29,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:20:29,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:20:29,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:20:29,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:20:29,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:20:29,667 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:20:29,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:20:29,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:20:29,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:20:29,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:20:29,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:20:29,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:20:29,669 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:20:29,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:20:29,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:20:29,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:20:29,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:20:29,670 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:20:29,671 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:20:29,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:20:29,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:20:29,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:20:29,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:20:29,991 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:20:29,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-10 18:20:30,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f93f61391/afdde47acc6f4686891cc8c0ef0c09d1/FLAG94de4c6c9 [2022-01-10 18:20:30,375 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:20:30,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-10 18:20:30,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f93f61391/afdde47acc6f4686891cc8c0ef0c09d1/FLAG94de4c6c9 [2022-01-10 18:20:30,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f93f61391/afdde47acc6f4686891cc8c0ef0c09d1 [2022-01-10 18:20:30,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:20:30,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:20:30,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:20:30,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:20:30,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:20:30,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c059927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30, skipping insertion in model container [2022-01-10 18:20:30,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:20:30,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:20:30,541 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/MultCommutative-2.c[970,983] [2022-01-10 18:20:30,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:20:30,550 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:20:30,559 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/MultCommutative-2.c[970,983] [2022-01-10 18:20:30,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:20:30,568 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:20:30,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30 WrapperNode [2022-01-10 18:20:30,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:20:30,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:20:30,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:20:30,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:20:30,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,586 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-01-10 18:20:30,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:20:30,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:20:30,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:20:30,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:20:30,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:20:30,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:20:30,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:20:30,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:20:30,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:30,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:20:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:20:30,647 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) [2022-01-10 18:20:30,649 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 [2022-01-10 18:20:30,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:20:30,692 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-01-10 18:20:30,692 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-01-10 18:20:30,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:20:30,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:20:30,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:20:30,748 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:20:30,749 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:20:30,894 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:20:30,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:20:30,899 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:20:30,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:20:30 BoogieIcfgContainer [2022-01-10 18:20:30,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:20:30,901 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:20:30,902 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:20:30,916 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:20:30,919 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:20:30" (1/1) ... [2022-01-10 18:20:31,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:20:31 BasicIcfg [2022-01-10 18:20:31,006 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:20:31,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:20:31,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:20:31,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:20:31,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:20:30" (1/4) ... [2022-01-10 18:20:31,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb217f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:20:31, skipping insertion in model container [2022-01-10 18:20:31,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:20:30" (2/4) ... [2022-01-10 18:20:31,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb217f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:20:31, skipping insertion in model container [2022-01-10 18:20:31,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:20:30" (3/4) ... [2022-01-10 18:20:31,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb217f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:20:31, skipping insertion in model container [2022-01-10 18:20:31,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:20:31" (4/4) ... [2022-01-10 18:20:31,011 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.cTransformedIcfg [2022-01-10 18:20:31,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:20:31,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:20:31,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:20:31,068 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 [2022-01-10 18:20:31,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:20:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 18:20:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 18:20:31,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:20:31,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:20:31,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:20:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:20:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -878487567, now seen corresponding path program 1 times [2022-01-10 18:20:31,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:20:31,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749799097] [2022-01-10 18:20:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:31,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:20:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:20:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 18:20:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:20:31,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:20:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749799097] [2022-01-10 18:20:31,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749799097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:20:31,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:20:31,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 18:20:31,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271905692] [2022-01-10 18:20:31,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:20:31,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:20:31,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:20:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:20:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:20:31,425 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:20:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:20:31,513 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-01-10 18:20:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:20:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-10 18:20:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:20:31,520 INFO L225 Difference]: With dead ends: 36 [2022-01-10 18:20:31,521 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 18:20:31,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:20:31,525 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:20:31,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:20:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 18:20:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 18:20:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 18:20:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-10 18:20:31,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 20 [2022-01-10 18:20:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:20:31,552 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-10 18:20:31,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:20:31,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-10 18:20:31,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 18:20:31,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:20:31,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:20:31,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:20:31,554 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:20:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:20:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash 573011356, now seen corresponding path program 1 times [2022-01-10 18:20:31,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:20:31,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483414166] [2022-01-10 18:20:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:31,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:20:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:20:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 18:20:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:20:31,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:20:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483414166] [2022-01-10 18:20:31,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483414166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:20:31,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486906894] [2022-01-10 18:20:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:31,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:31,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:20:31,719 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) [2022-01-10 18:20:31,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:20:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 18:20:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:20:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:20:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:20:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 18:20:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486906894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:20:32,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:20:32,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-10 18:20:32,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694440524] [2022-01-10 18:20:32,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:20:32,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 18:20:32,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:20:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 18:20:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 18:20:32,302 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 18:20:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:20:32,434 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-01-10 18:20:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:20:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-01-10 18:20:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:20:32,435 INFO L225 Difference]: With dead ends: 35 [2022-01-10 18:20:32,435 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:20:32,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-10 18:20:32,437 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:20:32,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:20:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:20:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:20:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 18:20:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:20:32,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2022-01-10 18:20:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:20:32,443 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:20:32,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 18:20:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:20:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 18:20:32,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:20:32,444 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:20:32,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:20:32,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:32,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:20:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:20:32,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1452006525, now seen corresponding path program 1 times [2022-01-10 18:20:32,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:20:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803687101] [2022-01-10 18:20:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:32,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:20:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:20:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 18:20:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:20:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:20:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 18:20:32,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:20:32,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803687101] [2022-01-10 18:20:32,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803687101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:20:32,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794786213] [2022-01-10 18:20:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:32,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:20:32,896 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) [2022-01-10 18:20:32,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:20:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 18:20:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:20:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 18:20:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:20:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 18:20:33,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794786213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:20:33,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:20:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-10 18:20:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287602896] [2022-01-10 18:20:33,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:20:33,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 18:20:33,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:20:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 18:20:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:20:33,389 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 18:20:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:20:33,448 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-10 18:20:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:20:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-01-10 18:20:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:20:33,449 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:20:33,449 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:20:33,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:20:33,450 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:20:33,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 55 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:20:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:20:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-10 18:20:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 18:20:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-10 18:20:33,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 46 [2022-01-10 18:20:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:20:33,454 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-10 18:20:33,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 18:20:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-10 18:20:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:20:33,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:20:33,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:20:33,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:20:33,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 18:20:33,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:20:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:20:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash -579014909, now seen corresponding path program 2 times [2022-01-10 18:20:33,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:20:33,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036861272] [2022-01-10 18:20:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:33,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:20:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:33,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:20:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 18:20:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:20:34,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:20:34,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036861272] [2022-01-10 18:20:34,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036861272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:20:34,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106221745] [2022-01-10 18:20:34,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:20:34,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:20:34,328 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:20:34,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:20:34,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:20:34,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:20:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-10 18:20:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:20:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 18:20:35,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 18:21:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106221745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:12,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:12,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 43 [2022-01-10 18:21:12,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619151071] [2022-01-10 18:21:12,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:12,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 18:21:12,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 18:21:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 18:21:12,409 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 18:21:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:13,907 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2022-01-10 18:21:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 18:21:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 34 [2022-01-10 18:21:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:13,909 INFO L225 Difference]: With dead ends: 63 [2022-01-10 18:21:13,910 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 18:21:13,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 18:21:13,912 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:13,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 332 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-01-10 18:21:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 18:21:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-10 18:21:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-10 18:21:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2022-01-10 18:21:13,922 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 34 [2022-01-10 18:21:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:13,922 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2022-01-10 18:21:13,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 18:21:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2022-01-10 18:21:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:21:13,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:13,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:13,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:14,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:14,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 863393056, now seen corresponding path program 2 times [2022-01-10 18:21:14,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:14,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927171122] [2022-01-10 18:21:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:14,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:21:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 18:21:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 18:21:14,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927171122] [2022-01-10 18:21:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927171122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032981473] [2022-01-10 18:21:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:21:14,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:14,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:14,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:14,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:21:14,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:21:14,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:21:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 18:21:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 18:21:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:15,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032981473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:15,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 18:21:15,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 21 [2022-01-10 18:21:15,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725681418] [2022-01-10 18:21:15,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:15,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 18:21:15,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 18:21:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-10 18:21:15,511 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 18:21:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:15,718 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2022-01-10 18:21:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:21:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 47 [2022-01-10 18:21:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:15,719 INFO L225 Difference]: With dead ends: 50 [2022-01-10 18:21:15,719 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 18:21:15,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-01-10 18:21:15,720 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:15,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 138 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-10 18:21:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 18:21:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-10 18:21:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (25), 10 states have call predecessors, (25), 5 states have call successors, (25) [2022-01-10 18:21:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2022-01-10 18:21:15,727 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 47 [2022-01-10 18:21:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:15,727 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2022-01-10 18:21:15,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 18:21:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2022-01-10 18:21:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 18:21:15,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:15,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:15,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:15,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:15,944 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 43817754, now seen corresponding path program 3 times [2022-01-10 18:21:15,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975575900] [2022-01-10 18:21:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:15,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:21:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 18:21:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 18:21:16,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975575900] [2022-01-10 18:21:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975575900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225221589] [2022-01-10 18:21:16,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:21:16,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:16,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:16,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:21:16,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 18:21:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:21:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-10 18:21:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates...