/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:42:23,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:42:23,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:42:23,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 21:42:23,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 21:42:23,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 21:42:23,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 21:42:23,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 21:42:23,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 21:42:23,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 21:42:23,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 21:42:23,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 21:42:23,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:42:23,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:42:23,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:42:23,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:42:23,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:42:23,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:42:23,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:42:23,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:42:23,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:42:23,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:42:23,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:42:23,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:42:23,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:42:23,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 21:42:23,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 21:42:23,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 21:42:23,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 21:42:23,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 21:42:23,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 21:42:23,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 21:42:23,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 21:42:23,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:42:23,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:42:23,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:42:23,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:42:23,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:42:23,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:42:23,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:42:23,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:42:23,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:42:23,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:42:23,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:23,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:42:23,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:42:23,509 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:42:23,509 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:42:23,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:42:23,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:42:23,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:42:23,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:42:23,668 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:42:23,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max.c [2022-02-14 21:42:23,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324112a69/54faca011f1c4921af1778f1c902d09a/FLAG710ff2ef2 [2022-02-14 21:42:24,113 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:42:24,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c [2022-02-14 21:42:24,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324112a69/54faca011f1c4921af1778f1c902d09a/FLAG710ff2ef2 [2022-02-14 21:42:24,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324112a69/54faca011f1c4921af1778f1c902d09a [2022-02-14 21:42:24,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:42:24,128 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:42:24,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:24,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:42:24,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:42:24,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7457fce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24, skipping insertion in model container [2022-02-14 21:42:24,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:42:24,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:42:24,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c[485,498] [2022-02-14 21:42:24,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:24,262 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:42:24,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c[485,498] [2022-02-14 21:42:24,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:24,280 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:42:24,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24 WrapperNode [2022-02-14 21:42:24,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:24,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:42:24,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:42:24,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:42:24,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:42:24,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:42:24,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:42:24,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:42:24,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:24,343 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) [2022-02-14 21:42:24,344 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 [2022-02-14 21:42:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:42:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:42:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:42:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 21:42:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:42:24,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:42:24,379 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-14 21:42:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-14 21:42:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-14 21:42:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:42:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:42:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:42:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:42:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 21:42:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:42:24,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 21:42:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:42:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-14 21:42:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:42:24,429 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:42:24,430 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:42:24,543 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:42:24,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:42:24,548 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 21:42:24,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:24 BoogieIcfgContainer [2022-02-14 21:42:24,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:42:24,550 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:42:24,550 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:42:24,551 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:42:24,553 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:24" (1/1) ... [2022-02-14 21:42:24,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:24 BasicIcfg [2022-02-14 21:42:24,567 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:42:24,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:42:24,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:42:24,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:42:24,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:42:24" (1/4) ... [2022-02-14 21:42:24,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5351c27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:24, skipping insertion in model container [2022-02-14 21:42:24,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:24" (2/4) ... [2022-02-14 21:42:24,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5351c27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:24, skipping insertion in model container [2022-02-14 21:42:24,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:24" (3/4) ... [2022-02-14 21:42:24,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5351c27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:42:24, skipping insertion in model container [2022-02-14 21:42:24,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:24" (4/4) ... [2022-02-14 21:42:24,576 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.cJordan [2022-02-14 21:42:24,579 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:42:24,579 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:42:24,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:42:24,610 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-02-14 21:42:24,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:42:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 21:42:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 21:42:24,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:24,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:24,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 64952803, now seen corresponding path program 1 times [2022-02-14 21:42:24,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:24,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893120584] [2022-02-14 21:42:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 21:42:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:42:24,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:24,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893120584] [2022-02-14 21:42:24,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893120584] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:24,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:24,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:42:24,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785142972] [2022-02-14 21:42:24,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:42:24,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:42:24,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:42:24,802 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:42:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:24,870 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-02-14 21:42:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 21:42:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-14 21:42:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:24,877 INFO L225 Difference]: With dead ends: 39 [2022-02-14 21:42:24,877 INFO L226 Difference]: Without dead ends: 34 [2022-02-14 21:42:24,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:42:24,881 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:24,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:42:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-14 21:42:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-14 21:42:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 21:42:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-02-14 21:42:24,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2022-02-14 21:42:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:24,904 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-02-14 21:42:24,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:42:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-02-14 21:42:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 21:42:24,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:24,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:24,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:42:24,905 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2146770526, now seen corresponding path program 1 times [2022-02-14 21:42:24,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:24,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059606588] [2022-02-14 21:42:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:24,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 21:42:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:42:25,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:25,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059606588] [2022-02-14 21:42:25,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059606588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:25,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:25,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-14 21:42:25,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247114391] [2022-02-14 21:42:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:25,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:42:25,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:42:25,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:42:25,096 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:42:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:25,353 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-02-14 21:42:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 21:42:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-14 21:42:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:25,363 INFO L225 Difference]: With dead ends: 38 [2022-02-14 21:42:25,364 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 21:42:25,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-02-14 21:42:25,366 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:25,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 39 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 21:42:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-14 21:42:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 21:42:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-02-14 21:42:25,378 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2022-02-14 21:42:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:25,379 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-02-14 21:42:25,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 21:42:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-02-14 21:42:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 21:42:25,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:25,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:25,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:42:25,381 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -359953696, now seen corresponding path program 1 times [2022-02-14 21:42:25,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:25,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593619680] [2022-02-14 21:42:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:25,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 21:42:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 21:42:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-02-14 21:42:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-02-14 21:42:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 21:42:25,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:25,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593619680] [2022-02-14 21:42:25,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593619680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:25,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:25,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-14 21:42:25,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956918461] [2022-02-14 21:42:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:25,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 21:42:25,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 21:42:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-14 21:42:25,599 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 21:42:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:25,787 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-02-14 21:42:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 21:42:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-14 21:42:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:25,788 INFO L225 Difference]: With dead ends: 36 [2022-02-14 21:42:25,788 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 21:42:25,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-14 21:42:25,789 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 21:42:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 21:42:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 21:42:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-02-14 21:42:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 21:42:25,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-02-14 21:42:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:25,790 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 21:42:25,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 21:42:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 21:42:25,790 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 21:42:25,792 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:42:25,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 21:42:25,800 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-14 21:42:25,801 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:42:25,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:42:25 BasicIcfg [2022-02-14 21:42:25,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:42:25,804 INFO L158 Benchmark]: Toolchain (without parser) took 1676.02ms. Allocated memory was 206.6MB in the beginning and 251.7MB in the end (delta: 45.1MB). Free memory was 158.5MB in the beginning and 195.2MB in the end (delta: -36.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,804 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 206.6MB. Free memory was 175.1MB in the beginning and 175.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:42:25,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.46ms. Allocated memory is still 206.6MB. Free memory was 158.3MB in the beginning and 182.9MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,804 INFO L158 Benchmark]: Boogie Preprocessor took 36.14ms. Allocated memory is still 206.6MB. Free memory was 182.9MB in the beginning and 181.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,805 INFO L158 Benchmark]: RCFGBuilder took 231.34ms. Allocated memory is still 206.6MB. Free memory was 181.4MB in the beginning and 169.7MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,805 INFO L158 Benchmark]: IcfgTransformer took 16.91ms. Allocated memory is still 206.6MB. Free memory was 169.3MB in the beginning and 168.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,805 INFO L158 Benchmark]: TraceAbstraction took 1232.97ms. Allocated memory was 206.6MB in the beginning and 251.7MB in the end (delta: 45.1MB). Free memory was 167.8MB in the beginning and 195.2MB in the end (delta: -27.4MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. [2022-02-14 21:42:25,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 206.6MB. Free memory was 175.1MB in the beginning and 175.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 152.46ms. Allocated memory is still 206.6MB. Free memory was 158.3MB in the beginning and 182.9MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.14ms. Allocated memory is still 206.6MB. Free memory was 182.9MB in the beginning and 181.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 231.34ms. Allocated memory is still 206.6MB. Free memory was 181.4MB in the beginning and 169.7MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.91ms. Allocated memory is still 206.6MB. Free memory was 169.3MB in the beginning and 168.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1232.97ms. Allocated memory was 206.6MB in the beginning and 251.7MB in the end (delta: 45.1MB). Free memory was 167.8MB in the beginning and 195.2MB in the end (delta: -27.4MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 166 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 115 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 495 IncrementalHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 87 mSDtfsCounter, 495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 21:42:25,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...