/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_BITWISE.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:35:37,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:35:37,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:35:37,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 12:35:37,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 12:35:37,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 12:35:37,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 12:35:37,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 12:35:37,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 12:35:37,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 12:35:37,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 12:35:37,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 12:35:37,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:35:37,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:35:37,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:35:37,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:35:37,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:35:37,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:35:37,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:35:37,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:35:37,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:35:37,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:35:37,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:35:37,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:35:37,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 12:35:37,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 12:35:37,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 12:35:37,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 12:35:37,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 12:35:37,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 12:35:37,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:35:37,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:35:37,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:35:37,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:35:37,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:35:37,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:35:37,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:35:37,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:35:37,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:35:37,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:35:37,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:35:37,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:35:37,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:35:37,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:35:37,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:35:37,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:35:37,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:35:37,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:35:37,582 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:35:37,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:35:37,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:35:37,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:35:37,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:35:37,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:35:37,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:35:37,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:35:37,599 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:35:37,599 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:35:37,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:35:37,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:35:37,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:35:37,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:35:37,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:35:37,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:35:37,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:35:37,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:35:37,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:35:37,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:35:37,604 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:35:37,604 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:35:37,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:35:37,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:35:37,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:35:37,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:35:37,929 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:35:37,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max.c [2022-01-10 12:35:37,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a1b6b69/7f9fe2d1106a4878b0798e5e8bb71c1f/FLAG2ef490fb7 [2022-01-10 12:35:38,336 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:35:38,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c [2022-01-10 12:35:38,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a1b6b69/7f9fe2d1106a4878b0798e5e8bb71c1f/FLAG2ef490fb7 [2022-01-10 12:35:38,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a1b6b69/7f9fe2d1106a4878b0798e5e8bb71c1f [2022-01-10 12:35:38,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:35:38,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:35:38,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:35:38,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:35:38,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:35:38,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:35:38" (1/1) ... [2022-01-10 12:35:38,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6982d7fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:38, skipping insertion in model container [2022-01-10 12:35:38,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:35:38" (1/1) ... [2022-01-10 12:35:38,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:35:38,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:35:38,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 12:35:38,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:35:38,962 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 12:35:38,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:35:38,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 12:35:38,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:35:39,004 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:35:39,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max.c[544,557] [2022-01-10 12:35:39,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:35:39,054 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:35:39,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39 WrapperNode [2022-01-10 12:35:39,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:35:39,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:35:39,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:35:39,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:35:39,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,131 INFO L137 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-01-10 12:35:39,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:35:39,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:35:39,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:35:39,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:35:39,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:35:39,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:35:39,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:35:39,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:35:39,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:35:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:35:39,236 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 12:35:39,261 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 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-01-10 12:35:39,279 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-01-10 12:35:39,279 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-01-10 12:35:39,279 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-01-10 12:35:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-01-10 12:35:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-01-10 12:35:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 12:35:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:35:39,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:35:39,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 12:35:39,369 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:35:39,370 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:35:39,504 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:35:39,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:35:39,509 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:35:39,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:39 BoogieIcfgContainer [2022-01-10 12:35:39,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:35:39,510 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:35:39,510 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:35:39,514 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:35:39,516 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:39" (1/1) ... [2022-01-10 12:35:39,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:35:39 BasicIcfg [2022-01-10 12:35:39,575 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:35:39,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:35:39,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:35:39,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:35:39,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:35:38" (1/4) ... [2022-01-10 12:35:39,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd22183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:35:39, skipping insertion in model container [2022-01-10 12:35:39,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:39" (2/4) ... [2022-01-10 12:35:39,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd22183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:35:39, skipping insertion in model container [2022-01-10 12:35:39,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:39" (3/4) ... [2022-01-10 12:35:39,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd22183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:35:39, skipping insertion in model container [2022-01-10 12:35:39,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:35:39" (4/4) ... [2022-01-10 12:35:39,580 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.cTransformedIcfg [2022-01-10 12:35:39,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:35:39,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:35:39,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:35:39,616 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 12:35:39,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:35:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 12:35:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 12:35:39,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:39,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:39,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -813553221, now seen corresponding path program 1 times [2022-01-10 12:35:39,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:39,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719647796] [2022-01-10 12:35:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:39,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-10 12:35:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:35:39,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719647796] [2022-01-10 12:35:39,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719647796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:35:39,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:35:39,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-10 12:35:39,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625969162] [2022-01-10 12:35:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:35:39,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 12:35:39,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:39,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 12:35:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-01-10 12:35:39,947 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:35:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:40,371 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2022-01-10 12:35:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 12:35:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-10 12:35:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:40,385 INFO L225 Difference]: With dead ends: 82 [2022-01-10 12:35:40,386 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 12:35:40,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:35:40,393 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:40,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 167 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 12:35:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 12:35:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-01-10 12:35:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.25) internal successors, (30), 28 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-01-10 12:35:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-01-10 12:35:40,433 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 18 [2022-01-10 12:35:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-01-10 12:35:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:35:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-01-10 12:35:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 12:35:40,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:40,438 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:35:40,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:40,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1001164295, now seen corresponding path program 1 times [2022-01-10 12:35:40,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:40,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584511882] [2022-01-10 12:35:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:40,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:35:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:35:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:35:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:35:40,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584511882] [2022-01-10 12:35:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584511882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:35:40,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:35:40,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 12:35:40,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951506427] [2022-01-10 12:35:40,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:35:40,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 12:35:40,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 12:35:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:35:40,651 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:35:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:40,827 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-01-10 12:35:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:35:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-01-10 12:35:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:40,830 INFO L225 Difference]: With dead ends: 52 [2022-01-10 12:35:40,830 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 12:35:40,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:35:40,833 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:40,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:35:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 12:35:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-01-10 12:35:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 12:35:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-10 12:35:40,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 28 [2022-01-10 12:35:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:40,840 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-10 12:35:40,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:35:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-10 12:35:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 12:35:40,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:40,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:40,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:35:40,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 609952427, now seen corresponding path program 1 times [2022-01-10 12:35:40,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:40,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173078567] [2022-01-10 12:35:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:40,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-10 12:35:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:35:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:35:40,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173078567] [2022-01-10 12:35:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173078567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039482037] [2022-01-10 12:35:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:41,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:35:41,001 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 12:35:41,002 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 12:35:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:35:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:35:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:35:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:35:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:35:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039482037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:35:41,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:35:41,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-01-10 12:35:41,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018476529] [2022-01-10 12:35:41,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:35:41,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 12:35:41,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 12:35:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-01-10 12:35:41,562 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 12:35:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:41,850 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-01-10 12:35:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:35:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 31 [2022-01-10 12:35:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:41,851 INFO L225 Difference]: With dead ends: 50 [2022-01-10 12:35:41,851 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 12:35:41,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-10 12:35:41,853 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:41,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 188 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 12:35:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 12:35:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-10 12:35:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 12:35:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-10 12:35:41,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 31 [2022-01-10 12:35:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:41,858 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-10 12:35:41,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 12:35:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-10 12:35:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 12:35:41,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:41,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:41,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 12:35:42,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:42,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash -49604129, now seen corresponding path program 1 times [2022-01-10 12:35:42,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:42,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409969581] [2022-01-10 12:35:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:42,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:42,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:35:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:42,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:35:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:42,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:35:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:43,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:43,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:35:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 12:35:43,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409969581] [2022-01-10 12:35:43,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409969581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308020340] [2022-01-10 12:35:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:43,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:35:43,060 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 12:35:43,061 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 12:35:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-10 12:35:43,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:35:43,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 12:35:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:44,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:44,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:44,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 12:35:44,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 261 treesize of output 129 [2022-01-10 12:35:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 12:35:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:35:50,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308020340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:50,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:35:50,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2022-01-10 12:35:50,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354205571] [2022-01-10 12:35:50,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:35:50,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 12:35:50,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:50,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 12:35:50,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1152, Unknown=2, NotChecked=0, Total=1260 [2022-01-10 12:35:50,679 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 12:35:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:53,387 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2022-01-10 12:35:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 12:35:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 41 [2022-01-10 12:35:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:53,389 INFO L225 Difference]: With dead ends: 70 [2022-01-10 12:35:53,389 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 12:35:53,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=315, Invalid=2989, Unknown=2, NotChecked=0, Total=3306 [2022-01-10 12:35:53,391 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 140 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:53,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 212 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 12:35:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 12:35:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2022-01-10 12:35:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 12:35:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2022-01-10 12:35:53,402 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2022-01-10 12:35:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:53,402 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2022-01-10 12:35:53,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.6) internal successors, (40), 22 states have internal predecessors, (40), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-01-10 12:35:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2022-01-10 12:35:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 12:35:53,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:53,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:53,437 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 12:35:53,628 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,SelfDestructingSolverStorable3 [2022-01-10 12:35:53,628 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash -731924815, now seen corresponding path program 1 times [2022-01-10 12:35:53,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:53,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453181868] [2022-01-10 12:35:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:53,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:35:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:35:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:35:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:35:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:35:53,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453181868] [2022-01-10 12:35:53,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453181868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:35:53,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:35:53,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 12:35:53,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826433560] [2022-01-10 12:35:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:35:53,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 12:35:53,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:53,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 12:35:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:35:53,779 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 12:35:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:54,055 INFO L93 Difference]: Finished difference Result 98 states and 158 transitions. [2022-01-10 12:35:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 12:35:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-01-10 12:35:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:54,057 INFO L225 Difference]: With dead ends: 98 [2022-01-10 12:35:54,057 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 12:35:54,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-10 12:35:54,058 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 40 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:54,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 150 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 12:35:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 12:35:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-01-10 12:35:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 states have internal predecessors, (43), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 12:35:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2022-01-10 12:35:54,068 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 42 [2022-01-10 12:35:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:54,068 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2022-01-10 12:35:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 12:35:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2022-01-10 12:35:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 12:35:54,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:54,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 12:35:54,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash 7870447, now seen corresponding path program 1 times [2022-01-10 12:35:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:54,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521677047] [2022-01-10 12:35:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:54,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:35:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:35:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:35:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:35:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:35:54,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:54,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521677047] [2022-01-10 12:35:54,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521677047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:54,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141750621] [2022-01-10 12:35:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:54,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:54,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:35:54,624 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 12:35:54,625 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 12:35:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-10 12:35:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:35:55,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:35:55,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:35:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:55,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:35:55,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:55,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:35:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:56,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:56,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 16 [2022-01-10 12:35:56,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:56,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:35:56,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 12:35:56,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 19 [2022-01-10 12:35:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:35:57,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:35:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141750621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:57,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:35:57,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2022-01-10 12:35:57,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967411747] [2022-01-10 12:35:57,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:35:57,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 12:35:57,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:35:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 12:35:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 12:35:57,524 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 12:35:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:35:58,181 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2022-01-10 12:35:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 12:35:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 47 [2022-01-10 12:35:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:35:58,183 INFO L225 Difference]: With dead ends: 114 [2022-01-10 12:35:58,183 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 12:35:58,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 12:35:58,184 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 74 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:35:58,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 465 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 557 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2022-01-10 12:35:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 12:35:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-01-10 12:35:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.208955223880597) internal successors, (81), 68 states have internal predecessors, (81), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (41), 20 states have call predecessors, (41), 12 states have call successors, (41) [2022-01-10 12:35:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2022-01-10 12:35:58,196 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 47 [2022-01-10 12:35:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:35:58,197 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2022-01-10 12:35:58,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 20 states have internal predecessors, (53), 9 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 12:35:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2022-01-10 12:35:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 12:35:58,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:35:58,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:35:58,225 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 12:35:58,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:58,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:35:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:35:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash 37423119, now seen corresponding path program 1 times [2022-01-10 12:35:58,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:35:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793429467] [2022-01-10 12:35:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:58,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:35:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:35:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:35:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:35:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:35:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:35:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:35:58,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:35:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793429467] [2022-01-10 12:35:58,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793429467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:35:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679008070] [2022-01-10 12:35:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:35:58,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:35:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:35:58,896 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 12:35:58,914 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 12:35:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:35:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-10 12:35:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:35:59,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:35:59,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:35:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:35:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:35:59,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:36:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:00,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:00,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-01-10 12:36:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:00,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:00,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 12:36:00,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 19 [2022-01-10 12:36:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:36:00,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679008070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:01,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:36:01,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2022-01-10 12:36:01,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81525143] [2022-01-10 12:36:01,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:01,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 12:36:01,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 12:36:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 12:36:01,255 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 12:36:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:02,066 INFO L93 Difference]: Finished difference Result 135 states and 185 transitions. [2022-01-10 12:36:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 12:36:02,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 47 [2022-01-10 12:36:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:02,068 INFO L225 Difference]: With dead ends: 135 [2022-01-10 12:36:02,068 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 12:36:02,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=2413, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 12:36:02,069 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:02,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 368 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 497 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-01-10 12:36:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 12:36:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-01-10 12:36:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 74 states have internal predecessors, (89), 20 states have call successors, (20), 10 states have call predecessors, (20), 12 states have return successors, (46), 23 states have call predecessors, (46), 13 states have call successors, (46) [2022-01-10 12:36:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 155 transitions. [2022-01-10 12:36:02,096 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 155 transitions. Word has length 47 [2022-01-10 12:36:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:02,096 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 155 transitions. [2022-01-10 12:36:02,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.037037037037037) internal successors, (55), 20 states have internal predecessors, (55), 10 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-10 12:36:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 155 transitions. [2022-01-10 12:36:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 12:36:02,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:02,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:02,120 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 12:36:02,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:02,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1830923525, now seen corresponding path program 1 times [2022-01-10 12:36:02,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636920281] [2022-01-10 12:36:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:02,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:36:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 12:36:02,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636920281] [2022-01-10 12:36:02,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636920281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407049955] [2022-01-10 12:36:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:02,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:02,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:02,520 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 12:36:02,521 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 12:36:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:36:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 12:36:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 12:36:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407049955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:36:03,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:36:03,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 11] total 23 [2022-01-10 12:36:03,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128222812] [2022-01-10 12:36:03,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:03,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 12:36:03,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:03,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 12:36:03,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-10 12:36:03,228 INFO L87 Difference]: Start difference. First operand 108 states and 155 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 12:36:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:03,872 INFO L93 Difference]: Finished difference Result 221 states and 363 transitions. [2022-01-10 12:36:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 12:36:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) Word has length 55 [2022-01-10 12:36:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:03,879 INFO L225 Difference]: With dead ends: 221 [2022-01-10 12:36:03,879 INFO L226 Difference]: Without dead ends: 142 [2022-01-10 12:36:03,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 12:36:03,890 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:03,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 231 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 12:36:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-10 12:36:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2022-01-10 12:36:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.205128205128205) internal successors, (94), 74 states have internal predecessors, (94), 20 states have call successors, (20), 10 states have call predecessors, (20), 11 states have return successors, (43), 25 states have call predecessors, (43), 13 states have call successors, (43) [2022-01-10 12:36:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 157 transitions. [2022-01-10 12:36:03,927 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 157 transitions. Word has length 55 [2022-01-10 12:36:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 157 transitions. [2022-01-10 12:36:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-10 12:36:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 157 transitions. [2022-01-10 12:36:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 12:36:03,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:03,930 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:03,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 12:36:04,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:04,148 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2142701466, now seen corresponding path program 1 times [2022-01-10 12:36:04,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850555706] [2022-01-10 12:36:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:04,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:04,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:36:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:05,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 12:36:05,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850555706] [2022-01-10 12:36:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850555706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880424989] [2022-01-10 12:36:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:05,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:05,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:36:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 12:36:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-10 12:36:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:06,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:06,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:06,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:06,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:36:06,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:06,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:36:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:07,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:07,970 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-10 12:36:07,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 42 [2022-01-10 12:36:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:07,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:07,978 INFO L353 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-01-10 12:36:07,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 1 [2022-01-10 12:36:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:36:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:08,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880424989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:08,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:36:08,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2022-01-10 12:36:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871952458] [2022-01-10 12:36:08,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:08,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 12:36:08,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 12:36:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 12:36:08,473 INFO L87 Difference]: Start difference. First operand 110 states and 157 transitions. Second operand has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-10 12:36:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:11,610 INFO L93 Difference]: Finished difference Result 226 states and 368 transitions. [2022-01-10 12:36:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-10 12:36:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) Word has length 56 [2022-01-10 12:36:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:11,613 INFO L225 Difference]: With dead ends: 226 [2022-01-10 12:36:11,613 INFO L226 Difference]: Without dead ends: 214 [2022-01-10 12:36:11,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=468, Invalid=6672, Unknown=0, NotChecked=0, Total=7140 [2022-01-10 12:36:11,616 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:11,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 374 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 918 Invalid, 0 Unknown, 380 Unchecked, 0.7s Time] [2022-01-10 12:36:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-10 12:36:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 167. [2022-01-10 12:36:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.278688524590164) internal successors, (156), 114 states have internal predecessors, (156), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (90), 41 states have call predecessors, (90), 18 states have call successors, (90) [2022-01-10 12:36:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 271 transitions. [2022-01-10 12:36:11,650 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 271 transitions. Word has length 56 [2022-01-10 12:36:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:11,650 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 271 transitions. [2022-01-10 12:36:11,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 13 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-01-10 12:36:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 271 transitions. [2022-01-10 12:36:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 12:36:11,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:11,652 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:11,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 12:36:11,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:11,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -197665093, now seen corresponding path program 2 times [2022-01-10 12:36:11,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467261096] [2022-01-10 12:36:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:36:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:36:12,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467261096] [2022-01-10 12:36:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467261096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273269114] [2022-01-10 12:36:12,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:36:12,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:12,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:36:12,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 12:36:14,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:36:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:36:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 98 conjunts are in the unsatisfiable core [2022-01-10 12:36:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:14,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 12:36:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:14,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:15,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-01-10 12:36:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:15,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-01-10 12:36:15,024 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 12:36:15,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-01-10 12:36:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:15,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:36:15,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:15,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-01-10 12:36:15,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-10 12:36:15,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-10 12:36:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 12:36:15,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:16,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273269114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:16,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:36:16,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 45 [2022-01-10 12:36:16,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705951595] [2022-01-10 12:36:16,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:16,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-10 12:36:16,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-10 12:36:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2490, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 12:36:16,621 INFO L87 Difference]: Start difference. First operand 167 states and 271 transitions. Second operand has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 12:36:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:18,646 INFO L93 Difference]: Finished difference Result 371 states and 664 transitions. [2022-01-10 12:36:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 12:36:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) Word has length 57 [2022-01-10 12:36:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:18,649 INFO L225 Difference]: With dead ends: 371 [2022-01-10 12:36:18,649 INFO L226 Difference]: Without dead ends: 303 [2022-01-10 12:36:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=601, Invalid=6538, Unknown=1, NotChecked=0, Total=7140 [2022-01-10 12:36:18,651 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 302 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:18,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 507 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 702 Invalid, 0 Unknown, 321 Unchecked, 0.5s Time] [2022-01-10 12:36:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-10 12:36:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2022-01-10 12:36:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 177 states have (on average 1.2598870056497176) internal successors, (223), 166 states have internal predecessors, (223), 39 states have call successors, (39), 16 states have call predecessors, (39), 28 states have return successors, (142), 62 states have call predecessors, (142), 30 states have call successors, (142) [2022-01-10 12:36:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 404 transitions. [2022-01-10 12:36:18,692 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 404 transitions. Word has length 57 [2022-01-10 12:36:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:18,692 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 404 transitions. [2022-01-10 12:36:18,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 12:36:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 404 transitions. [2022-01-10 12:36:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 12:36:18,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:18,694 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 12:36:18,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:18,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash -168112421, now seen corresponding path program 2 times [2022-01-10 12:36:18,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:18,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535352909] [2022-01-10 12:36:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:18,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:36:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 12:36:19,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535352909] [2022-01-10 12:36:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535352909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421168428] [2022-01-10 12:36:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:36:19,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:19,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:36:19,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 12:36:20,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:36:20,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:36:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-10 12:36:20,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:20,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:21,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:21,240 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-10 12:36:21,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2022-01-10 12:36:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 12:36:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 12:36:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421168428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:36:21,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:36:21,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 43 [2022-01-10 12:36:21,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279359227] [2022-01-10 12:36:21,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:21,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 12:36:21,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 12:36:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 12:36:21,999 INFO L87 Difference]: Start difference. First operand 245 states and 404 transitions. Second operand has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) [2022-01-10 12:36:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:23,947 INFO L93 Difference]: Finished difference Result 448 states and 814 transitions. [2022-01-10 12:36:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-10 12:36:23,947 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) Word has length 57 [2022-01-10 12:36:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:23,950 INFO L225 Difference]: With dead ends: 448 [2022-01-10 12:36:23,950 INFO L226 Difference]: Without dead ends: 398 [2022-01-10 12:36:23,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=388, Invalid=5464, Unknown=0, NotChecked=0, Total=5852 [2022-01-10 12:36:23,952 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:23,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 738 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1292 Invalid, 0 Unknown, 312 Unchecked, 0.6s Time] [2022-01-10 12:36:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-10 12:36:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 301. [2022-01-10 12:36:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 209 states have internal predecessors, (276), 42 states have call successors, (42), 17 states have call predecessors, (42), 40 states have return successors, (206), 74 states have call predecessors, (206), 33 states have call successors, (206) [2022-01-10 12:36:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 524 transitions. [2022-01-10 12:36:23,991 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 524 transitions. Word has length 57 [2022-01-10 12:36:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:23,992 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 524 transitions. [2022-01-10 12:36:23,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (21), 18 states have call predecessors, (21), 14 states have call successors, (21) [2022-01-10 12:36:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 524 transitions. [2022-01-10 12:36:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 12:36:23,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:23,994 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:24,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 12:36:24,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 12:36:24,201 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1997188195, now seen corresponding path program 3 times [2022-01-10 12:36:24,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637485853] [2022-01-10 12:36:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:24,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 12:36:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:36:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 12:36:24,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637485853] [2022-01-10 12:36:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637485853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294262887] [2022-01-10 12:36:24,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:36:24,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:24,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:36:24,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 12:36:25,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 12:36:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:36:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-10 12:36:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:26,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 12:36:26,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-01-10 12:36:26,523 INFO L353 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2022-01-10 12:36:26,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2022-01-10 12:36:26,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-10 12:36:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 12:36:26,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:26,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-10 12:36:27,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-10 12:36:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294262887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:28,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:36:28,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-01-10 12:36:28,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369646212] [2022-01-10 12:36:28,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:36:28,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 12:36:28,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:36:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 12:36:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1839, Unknown=3, NotChecked=0, Total=1980 [2022-01-10 12:36:28,968 INFO L87 Difference]: Start difference. First operand 301 states and 524 transitions. Second operand has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 12:36:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:36:30,704 INFO L93 Difference]: Finished difference Result 480 states and 906 transitions. [2022-01-10 12:36:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 12:36:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) Word has length 57 [2022-01-10 12:36:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:36:30,714 INFO L225 Difference]: With dead ends: 480 [2022-01-10 12:36:30,714 INFO L226 Difference]: Without dead ends: 459 [2022-01-10 12:36:30,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=374, Invalid=4315, Unknown=3, NotChecked=0, Total=4692 [2022-01-10 12:36:30,716 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 12:36:30,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 600 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 864 Invalid, 0 Unknown, 232 Unchecked, 0.6s Time] [2022-01-10 12:36:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-10 12:36:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 354. [2022-01-10 12:36:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 257 states have (on average 1.2762645914396886) internal successors, (328), 248 states have internal predecessors, (328), 47 states have call successors, (47), 19 states have call predecessors, (47), 49 states have return successors, (248), 86 states have call predecessors, (248), 38 states have call successors, (248) [2022-01-10 12:36:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 623 transitions. [2022-01-10 12:36:30,785 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 623 transitions. Word has length 57 [2022-01-10 12:36:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:36:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 623 transitions. [2022-01-10 12:36:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 15 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 12:36:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 623 transitions. [2022-01-10 12:36:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 12:36:30,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:36:30,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:36:30,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 12:36:30,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:30,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:36:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:36:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -911378934, now seen corresponding path program 1 times [2022-01-10 12:36:30,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:36:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914158743] [2022-01-10 12:36:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:30,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:36:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-01-10 12:36:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 12:36:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 12:36:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:36:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:36:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-10 12:36:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 12:36:31,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:36:31,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914158743] [2022-01-10 12:36:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914158743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:36:31,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394829285] [2022-01-10 12:36:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:36:31,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:36:31,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:36:31,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:36:31,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 12:36:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:36:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-10 12:36:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:36:32,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 12:36:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:32,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:32,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 12:36:32,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 261 treesize of output 129 [2022-01-10 12:36:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 12:36:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:36:33,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 12:36:33,117 INFO L173 IndexEqualityManager]: detected equality via solver