/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:49:00,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:49:00,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:49:00,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:49:00,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:49:00,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:49:00,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:49:00,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:49:00,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:49:00,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:49:00,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:49:00,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:49:00,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:49:00,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:49:00,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:49:00,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:49:00,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:49:00,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:49:00,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:49:00,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:49:00,383 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:49:00,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:49:00,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:49:00,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:49:00,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:49:00,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:49:00,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:49:00,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:49:00,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:49:00,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:49:00,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:49:00,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:49:00,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:49:00,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:49:00,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:49:00,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:49:00,419 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:49:00,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:49:00,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:49:00,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:49:00,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:49:00,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:49:00,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:49:00,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:49:00,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:49:00,422 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:49:00,422 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:49:00,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:49:00,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:49:00,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:49:00,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:49:00,615 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:49:00,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-03-20 08:49:00,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23ca0e9f/3d65e371a3df497cab9cb6c313a2fbab/FLAG7c102d4a9 [2022-03-20 08:49:01,029 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:49:01,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-03-20 08:49:01,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23ca0e9f/3d65e371a3df497cab9cb6c313a2fbab/FLAG7c102d4a9 [2022-03-20 08:49:01,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b23ca0e9f/3d65e371a3df497cab9cb6c313a2fbab [2022-03-20 08:49:01,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:49:01,044 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:49:01,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:49:01,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:49:01,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:49:01,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e7e75b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01, skipping insertion in model container [2022-03-20 08:49:01,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:49:01,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:49:01,170 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-03-20 08:49:01,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:49:01,198 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:49:01,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2022-03-20 08:49:01,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:49:01,217 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:49:01,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01 WrapperNode [2022-03-20 08:49:01,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:49:01,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:49:01,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:49:01,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:49:01,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:49:01,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:49:01,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:49:01,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:49:01,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:49:01,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:01,271 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) [2022-03-20 08:49:01,285 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 [2022-03-20 08:49:01,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:49:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:49:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:49:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:49:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:49:01,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:49:01,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:49:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:49:01,350 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:49:01,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:49:01,481 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:49:01,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:49:01,493 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:49:01,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:49:01 BoogieIcfgContainer [2022-03-20 08:49:01,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:49:01,509 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:49:01,509 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:49:01,510 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:49:01,512 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:49:01" (1/1) ... [2022-03-20 08:49:01,513 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:49:01,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:49:01 BasicIcfg [2022-03-20 08:49:01,566 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:49:01,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:49:01,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:49:01,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:49:01,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:49:01" (1/4) ... [2022-03-20 08:49:01,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5311e7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:49:01, skipping insertion in model container [2022-03-20 08:49:01,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:49:01" (2/4) ... [2022-03-20 08:49:01,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5311e7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:49:01, skipping insertion in model container [2022-03-20 08:49:01,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:49:01" (3/4) ... [2022-03-20 08:49:01,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5311e7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:49:01, skipping insertion in model container [2022-03-20 08:49:01,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:49:01" (4/4) ... [2022-03-20 08:49:01,571 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.cqvasr [2022-03-20 08:49:01,574 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:49:01,574 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:49:01,620 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:49:01,626 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-20 08:49:01,627 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:49:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:49:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:49:01,652 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:01,653 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:01,653 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1479494173, now seen corresponding path program 1 times [2022-03-20 08:49:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:01,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109864873] [2022-03-20 08:49:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:01,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109864873] [2022-03-20 08:49:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109864873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:49:01,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:49:01,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:49:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664515302] [2022-03-20 08:49:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:49:01,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:49:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:49:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:49:01,844 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:01,878 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 08:49:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:49:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 08:49:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:01,883 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:49:01,884 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 08:49:01,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:49:01,888 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:01,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:49:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 08:49:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 08:49:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-20 08:49:01,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-03-20 08:49:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:01,913 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-20 08:49:01,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-20 08:49:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:49:01,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:01,914 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:01,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:49:01,914 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1508123324, now seen corresponding path program 1 times [2022-03-20 08:49:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:01,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749462302] [2022-03-20 08:49:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:01,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:02,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749462302] [2022-03-20 08:49:02,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749462302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:49:02,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:49:02,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:49:02,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434073378] [2022-03-20 08:49:02,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:49:02,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 08:49:02,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:02,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 08:49:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:49:02,006 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:02,059 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 08:49:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:49:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 08:49:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:02,061 INFO L225 Difference]: With dead ends: 22 [2022-03-20 08:49:02,061 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 08:49:02,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:49:02,065 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:02,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:49:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 08:49:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-20 08:49:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 08:49:02,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-03-20 08:49:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:02,069 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 08:49:02,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 08:49:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:49:02,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:02,070 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:02,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:49:02,070 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash 89998238, now seen corresponding path program 1 times [2022-03-20 08:49:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063724990] [2022-03-20 08:49:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063724990] [2022-03-20 08:49:02,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063724990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:02,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361953463] [2022-03-20 08:49:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:02,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:02,154 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) [2022-03-20 08:49:02,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:49:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 08:49:02,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361953463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:02,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:02,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-20 08:49:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764836097] [2022-03-20 08:49:02,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:02,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 08:49:02,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:02,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 08:49:02,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:49:02,358 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:02,487 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-20 08:49:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:49:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-03-20 08:49:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:02,488 INFO L225 Difference]: With dead ends: 27 [2022-03-20 08:49:02,488 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 08:49:02,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:49:02,489 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:02,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 18 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:49:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 08:49:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 08:49:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 08:49:02,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2022-03-20 08:49:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:02,493 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 08:49:02,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 08:49:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:49:02,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:02,494 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:02,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:02,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:02,695 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1261632700, now seen corresponding path program 2 times [2022-03-20 08:49:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:02,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226512090] [2022-03-20 08:49:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226512090] [2022-03-20 08:49:02,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226512090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701516583] [2022-03-20 08:49:02,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:49:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:02,790 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) [2022-03-20 08:49:02,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:49:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:49:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:49:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 08:49:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701516583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:03,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:03,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-03-20 08:49:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996080166] [2022-03-20 08:49:03,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:03,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 08:49:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 08:49:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:49:03,092 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:03,325 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-03-20 08:49:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:49:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-03-20 08:49:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:03,328 INFO L225 Difference]: With dead ends: 39 [2022-03-20 08:49:03,328 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 08:49:03,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2022-03-20 08:49:03,332 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:03,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 23 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:49:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 08:49:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 08:49:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 08:49:03,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2022-03-20 08:49:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:03,345 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 08:49:03,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 08:49:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 08:49:03,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:03,351 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:03,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:03,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:49:03,560 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1413178640, now seen corresponding path program 3 times [2022-03-20 08:49:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603637463] [2022-03-20 08:49:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:03,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603637463] [2022-03-20 08:49:03,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603637463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495896978] [2022-03-20 08:49:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:49:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:03,696 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) [2022-03-20 08:49:03,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:49:03,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 08:49:03,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:49:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:49:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:03,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:04,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495896978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:04,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:04,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-03-20 08:49:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790329776] [2022-03-20 08:49:04,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:04,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 08:49:04,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 08:49:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 08:49:04,159 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:04,651 INFO L93 Difference]: Finished difference Result 63 states and 96 transitions. [2022-03-20 08:49:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:49:04,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-03-20 08:49:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:04,652 INFO L225 Difference]: With dead ends: 63 [2022-03-20 08:49:04,652 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 08:49:04,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1268, Invalid=2392, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 08:49:04,654 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:04,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 21 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:49:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 08:49:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 08:49:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:04,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-03-20 08:49:04,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 32 [2022-03-20 08:49:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:04,660 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-03-20 08:49:04,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 36 states have internal predecessors, (75), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 08:49:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-03-20 08:49:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 08:49:04,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:04,661 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:04,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:04,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:04,878 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1302475432, now seen corresponding path program 4 times [2022-03-20 08:49:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:04,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103829373] [2022-03-20 08:49:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:05,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103829373] [2022-03-20 08:49:05,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103829373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642720350] [2022-03-20 08:49:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:49:05,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:05,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:05,226 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) [2022-03-20 08:49:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:49:05,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:49:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:49:05,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 08:49:05,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:05,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 08:49:06,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642720350] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:06,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:49:06,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26, 28] total 55 [2022-03-20 08:49:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74230144] [2022-03-20 08:49:06,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:49:06,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:49:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:49:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2580, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 08:49:06,688 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:06,721 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-03-20 08:49:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:49:06,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 08:49:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:06,722 INFO L225 Difference]: With dead ends: 57 [2022-03-20 08:49:06,722 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:49:06,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 08:49:06,724 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:06,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:49:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:49:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:49:06,724 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) [2022-03-20 08:49:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:49:06,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2022-03-20 08:49:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:06,724 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:49:06,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:49:06,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:49:06,726 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:49:06,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:06,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:06,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:49:07,008 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(~SIZE~0)| ~SIZE~0) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:49:07,009 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2022-03-20 08:49:07,009 INFO L878 garLoopResultBuilder]: At program point L25-2(lines 23 30) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (= main_~i~0 (* (div main_~i~0 4) 4))) [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point L23-2(lines 23 30) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point L25(lines 25 28) no Hoare annotation was computed. [2022-03-20 08:49:07,009 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (= main_~i~0 (* main_~j~0 4))) [2022-03-20 08:49:07,009 INFO L882 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 17) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 08:49:07,010 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 17) no Hoare annotation was computed. [2022-03-20 08:49:07,012 INFO L719 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-03-20 08:49:07,013 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:49:07,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:49:07 BasicIcfg [2022-03-20 08:49:07,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:49:07,033 INFO L158 Benchmark]: Toolchain (without parser) took 5989.28ms. Allocated memory was 198.2MB in the beginning and 271.6MB in the end (delta: 73.4MB). Free memory was 139.3MB in the beginning and 242.1MB in the end (delta: -102.8MB). Peak memory consumption was 127.5MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,033 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 155.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:49:07,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.63ms. Allocated memory was 198.2MB in the beginning and 271.6MB in the end (delta: 73.4MB). Free memory was 139.1MB in the beginning and 241.9MB in the end (delta: -102.7MB). Peak memory consumption was 5.3MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,034 INFO L158 Benchmark]: Boogie Preprocessor took 30.20ms. Allocated memory is still 271.6MB. Free memory was 241.9MB in the beginning and 240.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,034 INFO L158 Benchmark]: RCFGBuilder took 259.14ms. Allocated memory is still 271.6MB. Free memory was 240.4MB in the beginning and 230.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,034 INFO L158 Benchmark]: IcfgTransformer took 56.80ms. Allocated memory is still 271.6MB. Free memory was 230.3MB in the beginning and 229.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,034 INFO L158 Benchmark]: TraceAbstraction took 5465.96ms. Allocated memory is still 271.6MB. Free memory was 228.9MB in the beginning and 242.1MB in the end (delta: -13.2MB). Peak memory consumption was 144.2MB. Max. memory is 8.0GB. [2022-03-20 08:49:07,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 155.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.63ms. Allocated memory was 198.2MB in the beginning and 271.6MB in the end (delta: 73.4MB). Free memory was 139.1MB in the beginning and 241.9MB in the end (delta: -102.7MB). Peak memory consumption was 5.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.20ms. Allocated memory is still 271.6MB. Free memory was 241.9MB in the beginning and 240.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.14ms. Allocated memory is still 271.6MB. Free memory was 240.4MB in the beginning and 230.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 56.80ms. Allocated memory is still 271.6MB. Free memory was 230.3MB in the beginning and 229.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5465.96ms. Allocated memory is still 271.6MB. Free memory was 228.9MB in the beginning and 242.1MB in the end (delta: -13.2MB). Peak memory consumption was 144.2MB. 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: 14]: 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 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 6, TraceHistogramMax: 22, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 223 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 222 mSDsluCounter, 130 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 60 mSDsCounter, 335 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 297 IncrementalHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 335 mSolverCounterUnsat, 70 mSDtfsCounter, 297 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 164 SyntacticMatches, 23 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=5, InterpolantAutomatonStates: 66, 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, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 35 NumberOfFragments, 38 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 380 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 268 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 SizeOfPredicates, 7 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 484/1803 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 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: !(50000001 <= SIZE) || i == i / 4 * 4 RESULT: Ultimate proved your program to be correct! [2022-03-20 08:49:07,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...