/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/array-fpi/s1if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 03:25:32,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 03:25:32,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 03:25:32,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 03:25:32,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 03:25:32,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 03:25:32,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 03:25:32,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 03:25:32,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 03:25:32,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 03:25:32,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 03:25:32,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 03:25:32,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 03:25:32,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 03:25:32,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 03:25:32,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 03:25:32,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 03:25:32,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 03:25:32,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 03:25:32,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 03:25:32,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 03:25:32,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 03:25:32,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 03:25:32,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 03:25:32,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 03:25:32,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 03:25:32,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 03:25:32,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 03:25:32,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 03:25:32,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 03:25:32,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 03:25:32,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 03:25:32,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 03:25:32,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 03:25:32,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 03:25:32,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 03:25:32,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 03:25:32,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 03:25:32,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 03:25:32,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 03:25:32,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 03:25:32,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 03:25:32,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 03:25:32,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 03:25:32,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 03:25:32,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 03:25:32,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 03:25:32,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 03:25:32,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 03:25:32,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:25:32,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 03:25:32,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 03:25:32,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 03:25:32,480 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 03:25:32,480 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 03:25:32,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 03:25:32,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 03:25:32,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 03:25:32,706 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 03:25:32,707 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 03:25:32,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1if.c [2022-01-11 03:25:32,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd94ed05/e72eae035bb943c9bb2c3a1a5f7f7d98/FLAGdde84589f [2022-01-11 03:25:33,189 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 03:25:33,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c [2022-01-11 03:25:33,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd94ed05/e72eae035bb943c9bb2c3a1a5f7f7d98/FLAGdde84589f [2022-01-11 03:25:33,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd94ed05/e72eae035bb943c9bb2c3a1a5f7f7d98 [2022-01-11 03:25:33,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 03:25:33,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 03:25:33,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 03:25:33,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 03:25:33,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 03:25:33,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253f1f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33, skipping insertion in model container [2022-01-11 03:25:33,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 03:25:33,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 03:25:33,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c[587,600] [2022-01-11 03:25:33,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:25:33,424 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 03:25:33,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c[587,600] [2022-01-11 03:25:33,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:25:33,448 INFO L208 MainTranslator]: Completed translation [2022-01-11 03:25:33,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33 WrapperNode [2022-01-11 03:25:33,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 03:25:33,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 03:25:33,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 03:25:33,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 03:25:33,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,490 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-01-11 03:25:33,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 03:25:33,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 03:25:33,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 03:25:33,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 03:25:33,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 03:25:33,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 03:25:33,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 03:25:33,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 03:25:33,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:25:33,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:33,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 03:25:33,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 03:25:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 03:25:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 03:25:33,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 03:25:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 03:25:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 03:25:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 03:25:33,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 03:25:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 03:25:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 03:25:33,663 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 03:25:33,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 03:25:33,781 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 03:25:33,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 03:25:33,785 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 03:25:33,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:25:33 BoogieIcfgContainer [2022-01-11 03:25:33,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 03:25:33,786 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 03:25:33,786 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 03:25:33,787 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 03:25:33,789 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:25:33" (1/1) ... [2022-01-11 03:25:33,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:25:33 BasicIcfg [2022-01-11 03:25:33,870 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 03:25:33,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 03:25:33,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 03:25:33,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 03:25:33,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:25:33" (1/4) ... [2022-01-11 03:25:33,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257d8408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:25:33, skipping insertion in model container [2022-01-11 03:25:33,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:25:33" (2/4) ... [2022-01-11 03:25:33,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257d8408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:25:33, skipping insertion in model container [2022-01-11 03:25:33,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:25:33" (3/4) ... [2022-01-11 03:25:33,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257d8408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 03:25:33, skipping insertion in model container [2022-01-11 03:25:33,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:25:33" (4/4) ... [2022-01-11 03:25:33,875 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.cTransformedIcfg [2022-01-11 03:25:33,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 03:25:33,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 03:25:33,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 03:25:33,910 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 03:25:33,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 03:25:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 03:25:33,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:33,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:33,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1120674602, now seen corresponding path program 1 times [2022-01-11 03:25:33,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655140967] [2022-01-11 03:25:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:33,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:34,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:34,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655140967] [2022-01-11 03:25:34,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655140967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:25:34,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:25:34,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:25:34,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54340889] [2022-01-11 03:25:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:25:34,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 03:25:34,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 03:25:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 03:25:34,069 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:34,078 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-01-11 03:25:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 03:25:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 03:25:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:34,084 INFO L225 Difference]: With dead ends: 34 [2022-01-11 03:25:34,084 INFO L226 Difference]: Without dead ends: 15 [2022-01-11 03:25:34,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 03:25:34,090 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:34,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:25:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-11 03:25:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-11 03:25:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-11 03:25:34,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-11 03:25:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:34,113 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-11 03:25:34,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-11 03:25:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 03:25:34,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:34,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 03:25:34,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1402823417, now seen corresponding path program 1 times [2022-01-11 03:25:34,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799948260] [2022-01-11 03:25:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:34,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:34,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:34,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799948260] [2022-01-11 03:25:34,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799948260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:25:34,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:25:34,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 03:25:34,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853587040] [2022-01-11 03:25:34,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:25:34,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:25:34,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:25:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:25:34,336 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:34,409 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-11 03:25:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:25:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 03:25:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:34,411 INFO L225 Difference]: With dead ends: 28 [2022-01-11 03:25:34,411 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 03:25:34,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:25:34,417 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:34,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 03:25:34,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 03:25:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-01-11 03:25:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-11 03:25:34,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-11 03:25:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:34,427 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-11 03:25:34,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-11 03:25:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 03:25:34,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:34,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:34,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 03:25:34,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2086965841, now seen corresponding path program 1 times [2022-01-11 03:25:34,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993042168] [2022-01-11 03:25:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:34,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:34,474 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:25:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149193396] [2022-01-11 03:25:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:34,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:34,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 03:25:34,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 03:25:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 03:25:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:34,696 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 13 treesize of output 9 [2022-01-11 03:25:34,749 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 19 treesize of output 7 [2022-01-11 03:25:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:34,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:25:34,819 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 28 treesize of output 26 [2022-01-11 03:25:34,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 48 [2022-01-11 03:25:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:34,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993042168] [2022-01-11 03:25:34,873 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:25:34,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149193396] [2022-01-11 03:25:34,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149193396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:25:34,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 03:25:34,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2022-01-11 03:25:34,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829506874] [2022-01-11 03:25:34,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 03:25:34,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 03:25:34,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 03:25:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-11 03:25:34,875 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:35,109 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-11 03:25:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 03:25:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 03:25:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:35,111 INFO L225 Difference]: With dead ends: 27 [2022-01-11 03:25:35,111 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 03:25:35,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-11 03:25:35,112 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:35,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 03:25:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 03:25:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-01-11 03:25:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-11 03:25:35,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2022-01-11 03:25:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:35,116 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-11 03:25:35,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-11 03:25:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 03:25:35,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:35,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:35,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 03:25:35,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:35,321 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2058336690, now seen corresponding path program 1 times [2022-01-11 03:25:35,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:35,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104135569] [2022-01-11 03:25:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:35,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104135569] [2022-01-11 03:25:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104135569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 03:25:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391376741] [2022-01-11 03:25:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:35,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:36,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 03:25:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 03:25:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-11 03:25:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:36,166 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 11 treesize of output 7 [2022-01-11 03:25:36,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:36,230 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 14 treesize of output 16 [2022-01-11 03:25:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:36,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-11 03:25:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:36,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 45 [2022-01-11 03:25:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:36,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:25:43,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:25:43,332 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-01-11 03:25:43,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 03:25:43,338 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 24 treesize of output 16 [2022-01-11 03:25:43,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 10 [2022-01-11 03:25:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391376741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:25:43,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 03:25:43,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-01-11 03:25:43,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381085691] [2022-01-11 03:25:43,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 03:25:43,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-11 03:25:43,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-11 03:25:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=552, Unknown=3, NotChecked=0, Total=702 [2022-01-11 03:25:43,418 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:43,667 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-11 03:25:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 03:25:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 03:25:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:43,668 INFO L225 Difference]: With dead ends: 32 [2022-01-11 03:25:43,668 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 03:25:43,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=162, Invalid=591, Unknown=3, NotChecked=0, Total=756 [2022-01-11 03:25:43,669 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:43,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 65 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-11 03:25:43,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 03:25:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-11 03:25:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-11 03:25:43,673 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-01-11 03:25:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:43,674 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-11 03:25:43,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-11 03:25:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 03:25:43,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:43,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:43,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 03:25:43,879 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 [2022-01-11 03:25:43,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -168699024, now seen corresponding path program 2 times [2022-01-11 03:25:43,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668106266] [2022-01-11 03:25:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:43,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:44,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668106266] [2022-01-11 03:25:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668106266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 03:25:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388788436] [2022-01-11 03:25:44,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 03:25:44,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:44,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:44,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 03:25:44,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 03:25:44,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 03:25:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 03:25:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 03:25:44,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:44,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:25:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:44,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388788436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:25:44,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 03:25:44,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-11 03:25:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022891517] [2022-01-11 03:25:44,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 03:25:44,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 03:25:44,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 03:25:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-11 03:25:44,457 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:44,674 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-11 03:25:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 03:25:44,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 03:25:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:44,675 INFO L225 Difference]: With dead ends: 41 [2022-01-11 03:25:44,675 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 03:25:44,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-11 03:25:44,676 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:44,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 35 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 03:25:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 03:25:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2022-01-11 03:25:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-11 03:25:44,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2022-01-11 03:25:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:44,680 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-11 03:25:44,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-11 03:25:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-11 03:25:44,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:44,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:44,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 03:25:44,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:44,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1606695048, now seen corresponding path program 1 times [2022-01-11 03:25:44,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:44,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931888796] [2022-01-11 03:25:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:44,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:44,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:25:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626324891] [2022-01-11 03:25:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:44,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:44,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:44,924 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) [2022-01-11 03:25:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 03:25:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 03:25:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:45,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:25:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:45,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931888796] [2022-01-11 03:25:45,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:25:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626324891] [2022-01-11 03:25:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626324891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:25:45,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 03:25:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-11 03:25:45,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210351395] [2022-01-11 03:25:45,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 03:25:45,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 03:25:45,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 03:25:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-11 03:25:45,137 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:45,250 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-11 03:25:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 03:25:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-11 03:25:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:45,251 INFO L225 Difference]: With dead ends: 37 [2022-01-11 03:25:45,251 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 03:25:45,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-11 03:25:45,252 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:45,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 03:25:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 03:25:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-11 03:25:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-11 03:25:45,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-01-11 03:25:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:45,256 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-11 03:25:45,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-11 03:25:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 03:25:45,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:45,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:45,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 03:25:45,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:45,473 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash 345560586, now seen corresponding path program 2 times [2022-01-11 03:25:45,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:45,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066878034] [2022-01-11 03:25:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:45,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:45,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:25:45,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652288633] [2022-01-11 03:25:45,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 03:25:45,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:45,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:45,516 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) [2022-01-11 03:25:45,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 03:25:45,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 03:25:45,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 03:25:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 03:25:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:45,850 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 [2022-01-11 03:25:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:45,957 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 18 treesize of output 20 [2022-01-11 03:25:46,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 03:25:46,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:25:46,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 10 [2022-01-11 03:25:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:46,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:25:46,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:25:46,475 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-01-11 03:25:46,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:25:46,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 54 [2022-01-11 03:25:46,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 7 [2022-01-11 03:25:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:48,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066878034] [2022-01-11 03:25:48,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:25:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652288633] [2022-01-11 03:25:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652288633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:25:48,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 03:25:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-01-11 03:25:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953407553] [2022-01-11 03:25:48,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 03:25:48,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 03:25:48,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:25:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 03:25:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=268, Unknown=2, NotChecked=0, Total=342 [2022-01-11 03:25:48,791 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:25:55,824 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-11 03:25:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-11 03:25:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-11 03:25:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:25:55,825 INFO L225 Difference]: With dead ends: 32 [2022-01-11 03:25:55,825 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 03:25:55,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=138, Invalid=460, Unknown=2, NotChecked=0, Total=600 [2022-01-11 03:25:55,827 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 03:25:55,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 159 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-01-11 03:25:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 03:25:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-11 03:25:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-11 03:25:55,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2022-01-11 03:25:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:25:55,853 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-11 03:25:55,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:25:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-11 03:25:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 03:25:55,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:25:55,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:25:55,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 03:25:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:56,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:25:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:25:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 316931435, now seen corresponding path program 3 times [2022-01-11 03:25:56,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:25:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94797544] [2022-01-11 03:25:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:25:56,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:25:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:25:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:56,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:25:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94797544] [2022-01-11 03:25:56,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94797544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 03:25:56,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006804387] [2022-01-11 03:25:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 03:25:56,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:25:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:25:56,837 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) [2022-01-11 03:25:56,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 03:25:57,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-11 03:25:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 03:25:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-11 03:25:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:25:57,145 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 11 treesize of output 7 [2022-01-11 03:25:57,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:57,205 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 14 treesize of output 16 [2022-01-11 03:25:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:57,317 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 14 treesize of output 16 [2022-01-11 03:25:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:57,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-11 03:25:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:57,852 INFO L353 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-01-11 03:25:57,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 55 [2022-01-11 03:25:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:25:58,222 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-11 03:25:58,222 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 1 case distinctions, treesize of input 78 treesize of output 46 [2022-01-11 03:25:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:25:58,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:26:04,915 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-11 03:26:04,915 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 1 [2022-01-11 03:26:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:26:04,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006804387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:26:04,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 03:26:04,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 42 [2022-01-11 03:26:04,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097016505] [2022-01-11 03:26:04,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 03:26:04,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-11 03:26:04,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:26:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-11 03:26:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1503, Unknown=1, NotChecked=0, Total=1722 [2022-01-11 03:26:04,922 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:15,046 WARN L228 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 96 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-11 03:26:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:26:23,264 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-11 03:26:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-11 03:26:23,264 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-11 03:26:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:26:23,266 INFO L225 Difference]: With dead ends: 42 [2022-01-11 03:26:23,266 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 03:26:23,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=546, Invalid=3355, Unknown=5, NotChecked=0, Total=3906 [2022-01-11 03:26:23,268 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-11 03:26:23,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 57 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 248 Invalid, 0 Unknown, 148 Unchecked, 1.5s Time] [2022-01-11 03:26:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 03:26:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-01-11 03:26:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-11 03:26:23,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-01-11 03:26:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:26:23,274 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-11 03:26:23,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-11 03:26:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 03:26:23,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:26:23,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:26:23,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 03:26:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:26:23,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:26:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:26:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1982255569, now seen corresponding path program 3 times [2022-01-11 03:26:23,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:26:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545339476] [2022-01-11 03:26:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:26:23,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:26:23,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:26:23,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869096676] [2022-01-11 03:26:23,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 03:26:23,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:26:23,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:26:23,514 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) [2022-01-11 03:26:23,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 03:26:24,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 03:26:24,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 03:26:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-11 03:26:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:26:24,591 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 11 treesize of output 7 [2022-01-11 03:26:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:24,618 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 14 treesize of output 16 [2022-01-11 03:26:24,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:24,662 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 14 treesize of output 16 [2022-01-11 03:26:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:24,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-11 03:26:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:25,027 INFO L353 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-01-11 03:26:25,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 58 [2022-01-11 03:26:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:26:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:26:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:26:30,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:26:30,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545339476] [2022-01-11 03:26:30,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:26:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869096676] [2022-01-11 03:26:30,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869096676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:26:30,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 03:26:30,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2022-01-11 03:26:30,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831984156] [2022-01-11 03:26:30,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 03:26:30,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-11 03:26:30,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:26:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-11 03:26:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=629, Unknown=1, NotChecked=0, Total=812 [2022-01-11 03:26:30,257 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:26:31,004 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-11 03:26:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-11 03:26:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-11 03:26:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:26:31,005 INFO L225 Difference]: With dead ends: 43 [2022-01-11 03:26:31,005 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 03:26:31,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=206, Invalid=723, Unknown=1, NotChecked=0, Total=930 [2022-01-11 03:26:31,006 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 03:26:31,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 180 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-01-11 03:26:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 03:26:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-11 03:26:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-11 03:26:31,012 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-11 03:26:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:26:31,012 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-11 03:26:31,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 03:26:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-11 03:26:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 03:26:31,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:26:31,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:26:31,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-11 03:26:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:26:31,220 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:26:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:26:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2144030227, now seen corresponding path program 4 times [2022-01-11 03:26:31,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:26:31,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647978238] [2022-01-11 03:26:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:26:31,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:26:31,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:26:31,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563696962] [2022-01-11 03:26:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 03:26:31,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:26:31,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:26:31,246 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) [2022-01-11 03:26:31,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 03:26:31,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 03:26:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 03:26:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-11 03:26:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:26:31,801 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 11 treesize of output 7 [2022-01-11 03:26:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:31,842 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 14 treesize of output 16 [2022-01-11 03:26:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:31,960 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 14 treesize of output 16 [2022-01-11 03:26:32,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,085 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 35 treesize of output 34 [2022-01-11 03:26:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 55 [2022-01-11 03:26:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-01-11 03:26:32,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2022-01-11 03:26:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 03:26:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 03:26:32,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 03:26:32,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 16 [2022-01-11 03:26:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:26:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates...