/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:09:06,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:09:06,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:09:06,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:09:06,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:09:06,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:09:06,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:09:06,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:09:06,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:09:06,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:09:06,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:09:06,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:09:06,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:09:06,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:09:06,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:09:06,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:09:06,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:09:06,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:09:06,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:09:06,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:09:06,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:09:06,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:09:06,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:09:06,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:09:06,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 04:09:06,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 04:09:06,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 04:09:06,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 04:09:06,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 04:09:06,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 04:09:06,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 04:09:06,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 04:09:06,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 04:09:06,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 04:09:06,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 04:09:06,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 04:09:06,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 04:09:06,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 04:09:06,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:09:06,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:09:06,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:09:06,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:09:06,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:09:06,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:09:06,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:09:06,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:09:06,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:09:06,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:09:06,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:09:06,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:09:06,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:09:06,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:09:06,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:09:06,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:09:06,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:09:06,536 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:09:06,536 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:09:06,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:09:06,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:09:06,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:09:06,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:09:06,762 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:09:06,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-02-15 04:09:06,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6b1db24/e0bce2e3d2e043e68df83024ef06f0f8/FLAGfbf1ab5c9 [2022-02-15 04:09:07,150 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:09:07,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-02-15 04:09:07,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6b1db24/e0bce2e3d2e043e68df83024ef06f0f8/FLAGfbf1ab5c9 [2022-02-15 04:09:07,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c6b1db24/e0bce2e3d2e043e68df83024ef06f0f8 [2022-02-15 04:09:07,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:09:07,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:09:07,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:09:07,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:09:07,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:09:07,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60910bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07, skipping insertion in model container [2022-02-15 04:09:07,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:09:07,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:09:07,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-02-15 04:09:07,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:09:07,376 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:09:07,385 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-02-15 04:09:07,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:09:07,401 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:09:07,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07 WrapperNode [2022-02-15 04:09:07,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:09:07,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:09:07,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:09:07,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:09:07,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:09:07,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:09:07,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:09:07,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:09:07,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (1/1) ... [2022-02-15 04:09:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:09:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:09:07,466 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) [2022-02-15 04:09:07,468 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 [2022-02-15 04:09:07,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:09:07,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:09:07,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:09:07,495 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:09:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:09:07,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:09:07,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:09:07,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:09:07,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:09:07,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:09:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:09:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:09:07,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:09:07,560 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:09:07,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:09:07,669 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:09:07,674 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:09:07,675 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:09:07,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:09:07 BoogieIcfgContainer [2022-02-15 04:09:07,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:09:07,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:09:07,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:09:07,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:09:07,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:09:07" (1/3) ... [2022-02-15 04:09:07,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c515b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:09:07, skipping insertion in model container [2022-02-15 04:09:07,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:09:07" (2/3) ... [2022-02-15 04:09:07,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c515b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:09:07, skipping insertion in model container [2022-02-15 04:09:07,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:09:07" (3/3) ... [2022-02-15 04:09:07,686 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2022-02-15 04:09:07,690 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:09:07,690 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:09:07,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:09:07,765 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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=QVASR [2022-02-15 04:09:07,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:09:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 04:09:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:09:07,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:09:07,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:09:07,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:09:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:09:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-02-15 04:09:07,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:09:07,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077998593] [2022-02-15 04:09:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:09:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:09:07,895 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:09:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:09:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:09:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:09:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-02-15 04:09:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 04:09:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:09:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-15 04:09:08,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:09:08,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077998593] [2022-02-15 04:09:08,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077998593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:09:08,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:09:08,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 04:09:08,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715639788] [2022-02-15 04:09:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:09:08,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 04:09:08,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:09:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 04:09:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:09:08,152 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:09:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:09:08,264 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-02-15 04:09:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 04:09:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-02-15 04:09:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:09:08,277 INFO L225 Difference]: With dead ends: 58 [2022-02-15 04:09:08,277 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 04:09:08,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 04:09:08,286 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:09:08,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:09:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 04:09:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-15 04:09:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 04:09:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-15 04:09:08,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-02-15 04:09:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:09:08,330 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-15 04:09:08,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-15 04:09:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-15 04:09:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:09:08,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:09:08,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:09:08,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:09:08,333 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:09:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:09:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-02-15 04:09:08,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:09:08,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107360358] [2022-02-15 04:09:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:09:08,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:09:08,341 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:09:08,381 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-15 04:09:08,382 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-15 04:09:08,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 04:09:08,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:09:08,397 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-15 04:09:08,400 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 04:09:08,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 04:09:08 BoogieIcfgContainer [2022-02-15 04:09:08,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 04:09:08,413 INFO L158 Benchmark]: Toolchain (without parser) took 1243.67ms. Allocated memory was 188.7MB in the beginning and 296.7MB in the end (delta: 108.0MB). Free memory was 132.2MB in the beginning and 222.9MB in the end (delta: -90.7MB). Peak memory consumption was 16.5MB. Max. memory is 8.0GB. [2022-02-15 04:09:08,414 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 148.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:09:08,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.02ms. Allocated memory was 188.7MB in the beginning and 296.7MB in the end (delta: 108.0MB). Free memory was 132.0MB in the beginning and 268.0MB in the end (delta: -135.9MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-02-15 04:09:08,415 INFO L158 Benchmark]: Boogie Preprocessor took 22.31ms. Allocated memory is still 296.7MB. Free memory was 268.0MB in the beginning and 266.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 04:09:08,415 INFO L158 Benchmark]: RCFGBuilder took 251.38ms. Allocated memory is still 296.7MB. Free memory was 266.4MB in the beginning and 254.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 04:09:08,417 INFO L158 Benchmark]: TraceAbstraction took 734.70ms. Allocated memory is still 296.7MB. Free memory was 253.8MB in the beginning and 222.9MB in the end (delta: 30.9MB). Peak memory consumption was 30.4MB. Max. memory is 8.0GB. [2022-02-15 04:09:08,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 148.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.02ms. Allocated memory was 188.7MB in the beginning and 296.7MB in the end (delta: 108.0MB). Free memory was 132.0MB in the beginning and 268.0MB in the end (delta: -135.9MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.31ms. Allocated memory is still 296.7MB. Free memory was 268.0MB in the beginning and 266.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 251.38ms. Allocated memory is still 296.7MB. Free memory was 266.4MB in the beginning and 254.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 734.70ms. Allocated memory is still 296.7MB. Free memory was 253.8MB in the beginning and 222.9MB in the end (delta: 30.9MB). Peak memory consumption was 30.4MB. 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 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_uint() [L24] b = __VERIFIER_nondet_uint() [L25] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a >= 1) [L26] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a <= 65535) [L29] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b <= 65535) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND FALSE !(counter++<1) [L51] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 37 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17 IncrementalHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 33 mSDtfsCounter, 17 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-02-15 04:09:08,459 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...