/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/freire1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 09:01:17,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 09:01:17,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 09:01:17,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 09:01:17,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 09:01:17,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 09:01:17,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 09:01:17,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 09:01:17,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 09:01:17,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 09:01:17,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 09:01:17,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 09:01:17,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 09:01:17,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 09:01:17,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 09:01:17,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 09:01:17,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 09:01:17,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 09:01:17,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 09:01:17,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 09:01:17,230 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 09:01:17,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 09:01:17,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 09:01:17,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 09:01:17,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 09:01:17,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 09:01:17,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 09:01:17,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 09:01:17,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 09:01:17,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 09:01:17,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 09:01:17,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 09:01:17,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 09:01:17,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 09:01:17,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 09:01:17,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 09:01:17,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 09:01:17,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 09:01:17,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 09:01:17,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 09:01:17,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 09:01:17,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 09:01:17,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 09:01:17,259 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 09:01:17,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 09:01:17,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 09:01:17,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 09:01:17,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:01:17,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 09:01:17,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 09:01:17,262 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 09:01:17,262 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 09:01:17,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 09:01:17,262 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 09:01:17,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 09:01:17,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 09:01:17,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 09:01:17,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 09:01:17,471 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 09:01:17,471 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 09:01:17,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire1.c [2022-03-19 09:01:17,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bd0766ff/73ba92086e33439abf3c5d8a41195f1e/FLAG108554b53 [2022-03-19 09:01:17,886 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 09:01:17,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire1.c [2022-03-19 09:01:17,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bd0766ff/73ba92086e33439abf3c5d8a41195f1e/FLAG108554b53 [2022-03-19 09:01:17,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bd0766ff/73ba92086e33439abf3c5d8a41195f1e [2022-03-19 09:01:17,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 09:01:17,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 09:01:17,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 09:01:17,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 09:01:17,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 09:01:17,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:01:17" (1/1) ... [2022-03-19 09:01:17,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72be743b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:17, skipping insertion in model container [2022-03-19 09:01:17,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:01:17" (1/1) ... [2022-03-19 09:01:17,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 09:01:17,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 09:01:18,058 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/freire1.c[712,725] [2022-03-19 09:01:18,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:01:18,075 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 09:01:18,082 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/freire1.c[712,725] [2022-03-19 09:01:18,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:01:18,095 INFO L208 MainTranslator]: Completed translation [2022-03-19 09:01:18,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18 WrapperNode [2022-03-19 09:01:18,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 09:01:18,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 09:01:18,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 09:01:18,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 09:01:18,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 09:01:18,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 09:01:18,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 09:01:18,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 09:01:18,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (1/1) ... [2022-03-19 09:01:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:01:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:01:18,150 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) [2022-03-19 09:01:18,170 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 [2022-03-19 09:01:18,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 09:01:18,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 09:01:18,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 09:01:18,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 09:01:18,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 09:01:18,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 09:01:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 09:01:18,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 09:01:18,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 09:01:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 09:01:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 09:01:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 09:01:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 09:01:18,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 09:01:18,230 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 09:01:18,231 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 09:01:18,352 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 09:01:18,356 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 09:01:18,356 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 09:01:18,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:01:18 BoogieIcfgContainer [2022-03-19 09:01:18,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 09:01:18,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 09:01:18,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 09:01:18,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 09:01:18,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:01:17" (1/3) ... [2022-03-19 09:01:18,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb6083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:01:18, skipping insertion in model container [2022-03-19 09:01:18,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:01:18" (2/3) ... [2022-03-19 09:01:18,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb6083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:01:18, skipping insertion in model container [2022-03-19 09:01:18,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:01:18" (3/3) ... [2022-03-19 09:01:18,362 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2022-03-19 09:01:18,365 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 09:01:18,365 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 09:01:18,424 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 09:01:18,428 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-03-19 09:01:18,428 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 09:01:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 09:01:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 09:01:18,457 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:01:18,457 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:01:18,463 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:01:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:01:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2022-03-19 09:01:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:01:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188555047] [2022-03-19 09:01:18,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:01:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 2 times [2022-03-19 09:01:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:01:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546348625] [2022-03-19 09:01:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:01:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:01:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:01:18,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:01:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:01:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:01:18,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:01:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546348625] [2022-03-19 09:01:18,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546348625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:01:18,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:01:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:01:18,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:01:18,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188555047] [2022-03-19 09:01:18,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188555047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:01:18,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:01:18,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:01:18,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492640999] [2022-03-19 09:01:18,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:01:18,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 09:01:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:01:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 09:01:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:01:18,664 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-19 09:01:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:01:18,710 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-03-19 09:01:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 09:01:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-19 09:01:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:01:18,723 INFO L225 Difference]: With dead ends: 36 [2022-03-19 09:01:18,724 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 09:01:18,726 INFO L911 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 [2022-03-19 09:01:18,728 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:01:18,730 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:01:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 09:01:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 09:01:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 09:01:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-19 09:01:18,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-19 09:01:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:01:18,760 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-19 09:01:18,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-19 09:01:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-19 09:01:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 09:01:18,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:01:18,761 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:01:18,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 09:01:18,762 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:01:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:01:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2022-03-19 09:01:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:01:18,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233514082] [2022-03-19 09:01:18,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:01:18,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 2 times [2022-03-19 09:01:18,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:01:18,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424023942] [2022-03-19 09:01:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:01:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:01:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 09:01:18,789 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 09:01:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 09:01:18,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 09:01:18,818 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-19 09:01:18,819 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-19 09:01:18,820 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 09:01:18,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 09:01:18,823 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-19 09:01:18,825 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 09:01:18,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 09:01:18 BoogieIcfgContainer [2022-03-19 09:01:18,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 09:01:18,838 INFO L158 Benchmark]: Toolchain (without parser) took 930.01ms. Allocated memory is still 189.8MB. Free memory was 141.2MB in the beginning and 127.9MB in the end (delta: 13.3MB). Peak memory consumption was 13.3MB. Max. memory is 8.0GB. [2022-03-19 09:01:18,838 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 09:01:18,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.04ms. Allocated memory is still 189.8MB. Free memory was 140.9MB in the beginning and 166.2MB in the end (delta: -25.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 09:01:18,839 INFO L158 Benchmark]: Boogie Preprocessor took 30.76ms. Allocated memory is still 189.8MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 09:01:18,839 INFO L158 Benchmark]: RCFGBuilder took 229.16ms. Allocated memory is still 189.8MB. Free memory was 164.6MB in the beginning and 155.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 09:01:18,840 INFO L158 Benchmark]: TraceAbstraction took 478.02ms. Allocated memory is still 189.8MB. Free memory was 154.7MB in the beginning and 127.9MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-03-19 09:01:18,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 189.8MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.04ms. Allocated memory is still 189.8MB. Free memory was 140.9MB in the beginning and 166.2MB in the end (delta: -25.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.76ms. Allocated memory is still 189.8MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 229.16ms. Allocated memory is still 189.8MB. Free memory was 164.6MB in the beginning and 155.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 478.02ms. Allocated memory is still 189.8MB. Free memory was 154.7MB in the beginning and 127.9MB in the end (delta: 26.8MB). Peak memory consumption was 27.3MB. 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: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L32] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 20 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 0 StatesRemovedByMinimization, 0 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 [2022-03-19 09:01:18,873 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...