/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_SUM.epf -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 01:58:08,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 01:58:08,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 01:58:08,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 01:58:08,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 01:58:08,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 01:58:08,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 01:58:08,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 01:58:08,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 01:58:08,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 01:58:08,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 01:58:08,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 01:58:08,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 01:58:08,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 01:58:08,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 01:58:08,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 01:58:08,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 01:58:08,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 01:58:08,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 01:58:08,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 01:58:08,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 01:58:08,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 01:58:08,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 01:58:08,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 01:58:08,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 01:58:08,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 01:58:08,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 01:58:08,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 01:58:08,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 01:58:08,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 01:58:08,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 01:58:08,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 01:58:08,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 01:58:08,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 01:58:08,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 01:58:08,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 01:58:08,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 01:58:08,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 01:58:08,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 01:58:08,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 01:58:08,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 01:58:08,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 01:58:08,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 01:58:08,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 01:58:08,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 01:58:08,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 01:58:08,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 01:58:08,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 01:58:08,572 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 01:58:08,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 01:58:08,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 01:58:08,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 01:58:08,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 01:58:08,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 01:58:08,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 01:58:08,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 01:58:08,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:58:08,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 01:58:08,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 01:58:08,576 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 01:58:08,576 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 01:58:08,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 01:58:08,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 01:58:08,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 01:58:08,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 01:58:08,796 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 01:58:08,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2022-01-11 01:58:08,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b6aae27/8254b09595d74d35bc1861fe2b0b96be/FLAG25db09d76 [2022-01-11 01:58:09,184 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 01:58:09,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2022-01-11 01:58:09,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b6aae27/8254b09595d74d35bc1861fe2b0b96be/FLAG25db09d76 [2022-01-11 01:58:09,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4b6aae27/8254b09595d74d35bc1861fe2b0b96be [2022-01-11 01:58:09,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 01:58:09,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 01:58:09,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 01:58:09,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 01:58:09,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 01:58:09,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21caa2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09, skipping insertion in model container [2022-01-11 01:58:09,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 01:58:09,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 01:58:09,761 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-01-11 01:58:09,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:58:09,830 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 01:58:09,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2022-01-11 01:58:09,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 01:58:09,879 INFO L208 MainTranslator]: Completed translation [2022-01-11 01:58:09,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09 WrapperNode [2022-01-11 01:58:09,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 01:58:09,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 01:58:09,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 01:58:09,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 01:58:09,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,929 INFO L137 Inliner]: procedures = 72, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2022-01-11 01:58:09,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 01:58:09,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 01:58:09,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 01:58:09,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 01:58:09,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 01:58:09,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 01:58:09,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 01:58:09,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 01:58:09,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (1/1) ... [2022-01-11 01:58:09,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 01:58:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:10,013 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 01:58:10,017 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 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-01-11 01:58:10,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 01:58:10,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 01:58:10,121 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 01:58:10,124 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 01:58:10,353 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 01:58:10,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 01:58:10,358 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-11 01:58:10,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:10 BoogieIcfgContainer [2022-01-11 01:58:10,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 01:58:10,360 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 01:58:10,360 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 01:58:10,361 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 01:58:10,363 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:10" (1/1) ... [2022-01-11 01:58:10,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:10 BasicIcfg [2022-01-11 01:58:10,492 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 01:58:10,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 01:58:10,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 01:58:10,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 01:58:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 01:58:09" (1/4) ... [2022-01-11 01:58:10,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbd378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:10, skipping insertion in model container [2022-01-11 01:58:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 01:58:09" (2/4) ... [2022-01-11 01:58:10,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbd378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 01:58:10, skipping insertion in model container [2022-01-11 01:58:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 01:58:10" (3/4) ... [2022-01-11 01:58:10,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbd378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 01:58:10, skipping insertion in model container [2022-01-11 01:58:10,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 01:58:10" (4/4) ... [2022-01-11 01:58:10,497 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.iTransformedIcfg [2022-01-11 01:58:10,501 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 01:58:10,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 01:58:10,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 01:58:10,536 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 01:58:10,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 01:58:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 01:58:10,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:10,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:10,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:10,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1331431373, now seen corresponding path program 1 times [2022-01-11 01:58:10,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:10,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361299186] [2022-01-11 01:58:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:10,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:10,683 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 01:58:10,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:10,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361299186] [2022-01-11 01:58:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361299186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:10,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:58:10,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 01:58:10,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333065802] [2022-01-11 01:58:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:10,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 01:58:10,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 01:58:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 01:58:10,715 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:10,728 INFO L93 Difference]: Finished difference Result 64 states and 98 transitions. [2022-01-11 01:58:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 01:58:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-11 01:58:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:10,734 INFO L225 Difference]: With dead ends: 64 [2022-01-11 01:58:10,734 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 01:58:10,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 01:58:10,739 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:10,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:58:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 01:58:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-11 01:58:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-01-11 01:58:10,763 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 8 [2022-01-11 01:58:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:10,763 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-01-11 01:58:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-01-11 01:58:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 01:58:10,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:10,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:10,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 01:58:10,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1360090315, now seen corresponding path program 1 times [2022-01-11 01:58:10,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:10,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424600484] [2022-01-11 01:58:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:10,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:10,851 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 01:58:10,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:10,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424600484] [2022-01-11 01:58:10,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424600484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:10,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:58:10,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 01:58:10,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281926669] [2022-01-11 01:58:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:10,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 01:58:10,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 01:58:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 01:58:10,853 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:10,937 INFO L93 Difference]: Finished difference Result 79 states and 109 transitions. [2022-01-11 01:58:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 01:58:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-11 01:58:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:10,938 INFO L225 Difference]: With dead ends: 79 [2022-01-11 01:58:10,938 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 01:58:10,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 01:58:10,939 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:10,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 01:58:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 01:58:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-01-11 01:58:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-11 01:58:10,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2022-01-11 01:58:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:10,945 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-11 01:58:10,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-11 01:58:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 01:58:10,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:10,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:10,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 01:58:10,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1038187725, now seen corresponding path program 1 times [2022-01-11 01:58:10,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:10,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146503545] [2022-01-11 01:58:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:10,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 01:58:11,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146503545] [2022-01-11 01:58:11,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146503545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 01:58:11,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 01:58:11,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 01:58:11,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656945542] [2022-01-11 01:58:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 01:58:11,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 01:58:11,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 01:58:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 01:58:11,088 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:11,116 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-01-11 01:58:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 01:58:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 01:58:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:11,117 INFO L225 Difference]: With dead ends: 57 [2022-01-11 01:58:11,117 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 01:58:11,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 01:58:11,118 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:11,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 01:58:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 01:58:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2022-01-11 01:58:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-01-11 01:58:11,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 15 [2022-01-11 01:58:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-01-11 01:58:11,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-01-11 01:58:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 01:58:11,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:11,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 01:58:11,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1614881949, now seen corresponding path program 1 times [2022-01-11 01:58:11,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241574017] [2022-01-11 01:58:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 01:58:11,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241574017] [2022-01-11 01:58:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241574017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:58:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351353048] [2022-01-11 01:58:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:11,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:11,197 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 01:58:11,198 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 01:58:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:11,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-11 01:58:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:58:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 01:58:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:58:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 01:58:11,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351353048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:58:11,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:58:11,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 01:58:11,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093996159] [2022-01-11 01:58:11,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:58:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 01:58:11,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 01:58:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 01:58:11,556 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:11,752 INFO L93 Difference]: Finished difference Result 142 states and 199 transitions. [2022-01-11 01:58:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 01:58:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-11 01:58:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:11,754 INFO L225 Difference]: With dead ends: 142 [2022-01-11 01:58:11,754 INFO L226 Difference]: Without dead ends: 113 [2022-01-11 01:58:11,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-11 01:58:11,755 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 178 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:11,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 168 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 01:58:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-11 01:58:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-01-11 01:58:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-01-11 01:58:11,776 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 20 [2022-01-11 01:58:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:11,776 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-01-11 01:58:11,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-01-11 01:58:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-11 01:58:11,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:11,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:11,786 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 01:58:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:11,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash 746716797, now seen corresponding path program 2 times [2022-01-11 01:58:11,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:11,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300647353] [2022-01-11 01:58:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:11,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 01:58:12,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300647353] [2022-01-11 01:58:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300647353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:58:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228513353] [2022-01-11 01:58:12,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 01:58:12,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:12,184 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 01:58:12,186 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 01:58:12,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 01:58:12,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 01:58:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-11 01:58:12,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:58:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 01:58:12,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:58:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 01:58:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228513353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:58:13,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:58:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 14 [2022-01-11 01:58:13,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970346413] [2022-01-11 01:58:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:58:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-11 01:58:13,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-11 01:58:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-11 01:58:13,019 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 01:58:14,168 INFO L93 Difference]: Finished difference Result 435 states and 618 transitions. [2022-01-11 01:58:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-11 01:58:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-11 01:58:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 01:58:14,172 INFO L225 Difference]: With dead ends: 435 [2022-01-11 01:58:14,172 INFO L226 Difference]: Without dead ends: 427 [2022-01-11 01:58:14,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-01-11 01:58:14,173 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1254 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 01:58:14,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 528 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 01:58:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-11 01:58:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 153. [2022-01-11 01:58:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4342105263157894) internal successors, (218), 152 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 218 transitions. [2022-01-11 01:58:14,223 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 218 transitions. Word has length 41 [2022-01-11 01:58:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 01:58:14,223 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 218 transitions. [2022-01-11 01:58:14,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 218 transitions. [2022-01-11 01:58:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-11 01:58:14,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 01:58:14,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 01:58:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 01:58:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:14,443 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 01:58:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 01:58:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2084405715, now seen corresponding path program 3 times [2022-01-11 01:58:14,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 01:58:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139329800] [2022-01-11 01:58:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 01:58:14,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 01:58:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 01:58:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-11 01:58:14,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 01:58:14,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139329800] [2022-01-11 01:58:14,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139329800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 01:58:14,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574793436] [2022-01-11 01:58:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 01:58:14,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 01:58:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 01:58:14,642 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) [2022-01-11 01:58:14,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 01:58:15,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 01:58:15,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 01:58:15,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-11 01:58:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 01:58:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-01-11 01:58:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 01:58:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-11 01:58:28,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574793436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 01:58:28,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 01:58:28,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-11 01:58:28,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430204198] [2022-01-11 01:58:28,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 01:58:28,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 01:58:28,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 01:58:28,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 01:58:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=185, Unknown=5, NotChecked=0, Total=272 [2022-01-11 01:58:28,919 INFO L87 Difference]: Start difference. First operand 153 states and 218 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 01:58:43,408 WARN L228 SmtUtils]: Spent 11.24s on a formula simplification. DAG size of input: 41 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)