/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/array-fpi/pcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:36:47,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:36:47,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:36:47,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 21:36:47,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 21:36:47,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 21:36:47,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 21:36:47,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 21:36:47,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 21:36:47,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 21:36:47,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 21:36:47,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 21:36:47,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:36:47,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:36:47,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:36:47,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:36:47,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:36:47,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:36:47,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:36:47,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:36:47,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:36:47,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:36:47,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:36:47,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:36:47,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 21:36:47,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 21:36:47,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 21:36:47,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 21:36:47,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 21:36:47,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 21:36:47,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 21:36:47,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 21:36:47,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 21:36:47,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 21:36:47,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 21:36:47,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 21:36:47,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 21:36:47,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 21:36:47,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:36:47,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:36:47,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:36:47,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:36:47,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:36:47,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:36:47,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:36:47,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:36:47,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:36:47,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:36:47,490 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:36:47,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:36:47,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:36:47,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:36:47,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:36:47,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:36:47,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:36:47,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:36:47,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:36:47,493 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:36:47,493 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:36:47,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:36:47,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:36:47,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:36:47,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:36:47,726 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:36:47,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/pcompf.c [2022-01-10 21:36:47,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f68d69d/0d352dca5c3544dbbd009451676cbb28/FLAG82106825f [2022-01-10 21:36:48,181 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:36:48,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/pcompf.c [2022-01-10 21:36:48,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f68d69d/0d352dca5c3544dbbd009451676cbb28/FLAG82106825f [2022-01-10 21:36:48,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14f68d69d/0d352dca5c3544dbbd009451676cbb28 [2022-01-10 21:36:48,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:36:48,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:36:48,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:36:48,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:36:48,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:36:48,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777778ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48, skipping insertion in model container [2022-01-10 21:36:48,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:36:48,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:36:48,444 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/pcompf.c[589,602] [2022-01-10 21:36:48,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:36:48,491 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:36:48,503 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/pcompf.c[589,602] [2022-01-10 21:36:48,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:36:48,541 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:36:48,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48 WrapperNode [2022-01-10 21:36:48,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:36:48,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:36:48,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:36:48,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:36:48,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,588 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2022-01-10 21:36:48,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:36:48,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:36:48,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:36:48,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:36:48,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:36:48,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:36:48,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:36:48,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:36:48,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:48,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:36:48,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:48,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 21:36:48,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 21:36:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:36:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:36:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 21:36:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 21:36:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:36:48,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:36:48,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 21:36:48,744 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:36:48,746 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:36:48,952 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:36:48,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:36:48,957 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 21:36:48,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:48 BoogieIcfgContainer [2022-01-10 21:36:48,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:36:48,959 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:36:48,959 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:36:48,960 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:36:48,962 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:48" (1/1) ... [2022-01-10 21:36:49,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:36:49 BasicIcfg [2022-01-10 21:36:49,108 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:36:49,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:36:49,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:36:49,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:36:49,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:36:48" (1/4) ... [2022-01-10 21:36:49,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1803f532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:36:49, skipping insertion in model container [2022-01-10 21:36:49,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:48" (2/4) ... [2022-01-10 21:36:49,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1803f532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:36:49, skipping insertion in model container [2022-01-10 21:36:49,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:48" (3/4) ... [2022-01-10 21:36:49,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1803f532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:36:49, skipping insertion in model container [2022-01-10 21:36:49,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:36:49" (4/4) ... [2022-01-10 21:36:49,114 INFO L111 eAbstractionObserver]: Analyzing ICFG pcompf.cTransformedIcfg [2022-01-10 21:36:49,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:36:49,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:36:49,166 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:36:49,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 21:36:49,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:36:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2022-01-10 21:36:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 21:36:49,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:49,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:49,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1760602481, now seen corresponding path program 1 times [2022-01-10 21:36:49,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004500724] [2022-01-10 21:36:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:49,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:49,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004500724] [2022-01-10 21:36:49,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004500724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:49,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:36:49,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032681600] [2022-01-10 21:36:49,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:36:49,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:36:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:36:49,459 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-01-10 21:36:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:49,474 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-01-10 21:36:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:36:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2022-01-10 21:36:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:49,481 INFO L225 Difference]: With dead ends: 44 [2022-01-10 21:36:49,481 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 21:36:49,486 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 [2022-01-10 21:36:49,490 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2022-01-10 21:36:49,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:36:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 21:36:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 21:36:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-01-10 21:36:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-10 21:36:49,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-10 21:36:49,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:49,518 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-10 21:36:49,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-01-10 21:36:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-10 21:36:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 21:36:49,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:49,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:49,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:36:49,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -181613805, now seen corresponding path program 1 times [2022-01-10 21:36:49,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393018320] [2022-01-10 21:36:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:49,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:49,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:36:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323626908] [2022-01-10 21:36:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:49,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:49,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:36:49,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:36:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 21:36:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:36:50,095 INFO L353 Elim1Store]: treesize reduction 207, result has 23.6 percent of original size [2022-01-10 21:36:50,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 175 [2022-01-10 21:36:50,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:50,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:50,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:36:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:50,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:36:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:50,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:36:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:51,021 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 19 treesize of output 7 [2022-01-10 21:36:51,274 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 21:36:51,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2022-01-10 21:36:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:51,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:36:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:51,570 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 27 treesize of output 15 [2022-01-10 21:36:51,580 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 34 treesize of output 28 [2022-01-10 21:36:51,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:51,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:36:51,693 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 41 treesize of output 33 [2022-01-10 21:36:51,783 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 34 treesize of output 28 [2022-01-10 21:36:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:51,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:36:51,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-10 21:36:51,811 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 41 treesize of output 33 [2022-01-10 21:36:52,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:52,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:52,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:36:52,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 20 [2022-01-10 21:36:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:52,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:36:52,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393018320] [2022-01-10 21:36:52,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:36:52,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323626908] [2022-01-10 21:36:52,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323626908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:52,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:52,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 21:36:52,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100007382] [2022-01-10 21:36:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:52,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 21:36:52,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 21:36:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:36:52,116 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-01-10 21:36:54,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:36:56,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-10 21:36:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:56,968 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-10 21:36:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:36:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2022-01-10 21:36:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:56,975 INFO L225 Difference]: With dead ends: 39 [2022-01-10 21:36:56,975 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 21:36:56,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:36:56,976 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:56,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-01-10 21:36:56,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 21:36:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-01-10 21:36:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2022-01-10 21:36:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-01-10 21:36:56,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2022-01-10 21:36:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-01-10 21:36:56,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-01-10 21:36:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-01-10 21:36:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:36:56,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:56,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:56,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:36:57,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:57,190 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:57,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1821762063, now seen corresponding path program 1 times [2022-01-10 21:36:57,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098666575] [2022-01-10 21:36:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:57,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:57,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:36:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651671408] [2022-01-10 21:36:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:57,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:57,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:57,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:36:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:36:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:36:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:36:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:57,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:36:57,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:57,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098666575] [2022-01-10 21:36:57,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:36:57,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651671408] [2022-01-10 21:36:57,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651671408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:57,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:57,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:36:57,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096855647] [2022-01-10 21:36:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:57,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:36:57,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:36:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:36:57,407 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-01-10 21:36:59,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:01,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:03,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:37:03,985 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-01-10 21:37:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:37:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 [2022-01-10 21:37:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:37:03,987 INFO L225 Difference]: With dead ends: 50 [2022-01-10 21:37:03,987 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 21:37:03,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:37:03,989 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:37:03,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-01-10 21:37:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 21:37:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-01-10 21:37:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2022-01-10 21:37:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-10 21:37:03,994 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-01-10 21:37:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:37:03,995 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-10 21:37:03,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-01-10 21:37:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-10 21:37:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:37:03,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:37:03,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:37:04,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:37:04,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 21:37:04,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:37:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:37:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1206731409, now seen corresponding path program 1 times [2022-01-10 21:37:04,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:37:04,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727948921] [2022-01-10 21:37:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:04,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:37:04,265 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:37:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565473830] [2022-01-10 21:37:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:04,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:37:04,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:37:04,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:37:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:37:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:37:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:37:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:04,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:37:04,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:37:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727948921] [2022-01-10 21:37:04,416 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:37:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565473830] [2022-01-10 21:37:04,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565473830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:37:04,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:37:04,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:37:04,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803586165] [2022-01-10 21:37:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:37:04,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:37:04,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:37:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:37:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:37:04,418 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-01-10 21:37:06,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:08,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:10,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:37:11,022 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-01-10 21:37:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:37:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 [2022-01-10 21:37:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:37:11,024 INFO L225 Difference]: With dead ends: 52 [2022-01-10 21:37:11,024 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 21:37:11,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:37:11,025 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:37:11,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-01-10 21:37:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 21:37:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2022-01-10 21:37:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-01-10 21:37:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-10 21:37:11,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2022-01-10 21:37:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:37:11,034 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-10 21:37:11,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-01-10 21:37:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-10 21:37:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:37:11,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:37:11,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:37:11,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 21:37:11,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:11,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:37:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:37:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash -398868687, now seen corresponding path program 1 times [2022-01-10 21:37:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:37:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513909043] [2022-01-10 21:37:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:11,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:37:11,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:37:11,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966730082] [2022-01-10 21:37:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:11,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:37:11,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:37:11,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 21:37:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:37:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:37:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:37:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:11,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:37:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:11,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:37:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513909043] [2022-01-10 21:37:11,541 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:37:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966730082] [2022-01-10 21:37:11,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966730082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:37:11,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:37:11,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-01-10 21:37:11,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108682738] [2022-01-10 21:37:11,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:37:11,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:37:11,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:37:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:37:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:37:11,542 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-01-10 21:37:13,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:15,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:37:16,568 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-01-10 21:37:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 21:37:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) Word has length 16 [2022-01-10 21:37:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:37:16,569 INFO L225 Difference]: With dead ends: 59 [2022-01-10 21:37:16,569 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 21:37:16,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:37:16,571 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:37:16,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 57 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 72 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-01-10 21:37:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 21:37:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-01-10 21:37:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:37:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-10 21:37:16,577 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2022-01-10 21:37:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:37:16,577 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-10 21:37:16,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-01-10 21:37:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-10 21:37:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 21:37:16,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:37:16,578 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:37:16,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 21:37:16,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:16,779 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:37:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:37:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1360860273, now seen corresponding path program 1 times [2022-01-10 21:37:16,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:37:16,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620623526] [2022-01-10 21:37:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:16,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:37:16,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:37:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111499078] [2022-01-10 21:37:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:16,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:37:16,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:37:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 21:37:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:37:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:37:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:37:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:17,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:37:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:17,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:37:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620623526] [2022-01-10 21:37:17,559 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:37:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111499078] [2022-01-10 21:37:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111499078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:37:17,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:37:17,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-10 21:37:17,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371856445] [2022-01-10 21:37:17,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:37:17,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 21:37:17,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:37:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 21:37:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:37:17,561 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-01-10 21:37:19,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:21,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:23,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:37:24,472 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-01-10 21:37:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:37:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 21:37:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:37:24,474 INFO L225 Difference]: With dead ends: 58 [2022-01-10 21:37:24,474 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 21:37:24,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:37:24,475 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:37:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 77 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2022-01-10 21:37:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 21:37:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-10 21:37:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2022-01-10 21:37:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-01-10 21:37:24,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 18 [2022-01-10 21:37:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:37:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-01-10 21:37:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2022-01-10 21:37:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-01-10 21:37:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 21:37:24,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:37:24,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:37:24,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 21:37:24,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:24,684 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:37:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:37:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1272587215, now seen corresponding path program 2 times [2022-01-10 21:37:24,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:37:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527289193] [2022-01-10 21:37:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:24,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:37:24,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:37:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203490254] [2022-01-10 21:37:24,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:37:24,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:37:24,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:37:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 21:37:24,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:37:24,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:37:24,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:37:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:37:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:37:25,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:37:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:37:25,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:37:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527289193] [2022-01-10 21:37:25,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:37:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203490254] [2022-01-10 21:37:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203490254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:37:25,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:37:25,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-01-10 21:37:25,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783715717] [2022-01-10 21:37:25,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:37:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:37:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:37:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:37:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:37:25,102 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-01-10 21:37:27,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:29,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:31,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:33,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:37:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:37:33,725 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-10 21:37:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 21:37:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 [2022-01-10 21:37:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:37:33,726 INFO L225 Difference]: With dead ends: 37 [2022-01-10 21:37:33,727 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 21:37:33,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:37:33,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:37:33,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 31 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 8.5s Time] [2022-01-10 21:37:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 21:37:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2022-01-10 21:37:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-01-10 21:37:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-10 21:37:33,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-01-10 21:37:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:37:33,732 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-10 21:37:33,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-01-10 21:37:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-10 21:37:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 21:37:33,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:37:33,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:37:33,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 21:37:33,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:33,938 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:37:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:37:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash 889479949, now seen corresponding path program 1 times [2022-01-10 21:37:33,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:37:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031648781] [2022-01-10 21:37:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:33,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:37:33,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:37:33,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172277299] [2022-01-10 21:37:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:37:33,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:37:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:37:33,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:37:34,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 21:37:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:37:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 21:37:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:37:35,138 INFO L353 Elim1Store]: treesize reduction 207, result has 23.6 percent of original size [2022-01-10 21:37:35,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 227 [2022-01-10 21:37:35,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:37:35,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:37:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:37:35,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:37:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:37:35,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-01-10 21:37:35,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:37:35,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2022-01-10 21:37:35,313 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 26 treesize of output 20 [2022-01-10 21:37:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 7 [2022-01-10 21:37:35,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:37:35,435 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 46 treesize of output 48 [2022-01-10 21:37:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:37:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 7 [2022-01-10 21:37:35,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:37:35,605 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 38 treesize of output 40 [2022-01-10 21:37:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:37:35,649 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 21:37:35,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2022-01-10 21:37:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:37:35,743 INFO L353 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-01-10 21:37:35,743 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 2 case distinctions, treesize of input 98 treesize of output 96 [2022-01-10 21:37:35,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:35,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 15 [2022-01-10 21:37:35,847 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-10 21:37:35,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 58 [2022-01-10 21:37:35,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-01-10 21:37:36,001 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 33 treesize of output 33 [2022-01-10 21:37:36,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:37:36,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 55 [2022-01-10 21:37:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:37:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:37:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:37:36,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 21:37:36,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 112 [2022-01-10 21:37:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:37:36,389 INFO L328 TraceCheckSpWp]: Computing backward predicates...