/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/fermat1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:38:48,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:38:48,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:38:48,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:38:48,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:38:48,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:38:48,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:38:48,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:38:48,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:38:48,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:38:48,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:38:48,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:38:48,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:38:48,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:38:48,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:38:48,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:38:48,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:38:48,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:38:48,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:38:48,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:38:48,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:38:48,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:38:48,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:38:48,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:38:48,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:38:48,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:38:48,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:38:48,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:38:48,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:38:48,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:38:48,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:38:48,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:38:48,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:38:48,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:38:48,979 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:38:48,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:38:49,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:38:49,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:38:49,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:38:49,159 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:38:49,160 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:38:49,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2022-01-31 23:38:49,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ba8d3b7/08524e1e200747cb87514237dfd873e9/FLAG1ab7d57cf [2022-01-31 23:38:49,563 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:38:49,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2022-01-31 23:38:49,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ba8d3b7/08524e1e200747cb87514237dfd873e9/FLAG1ab7d57cf [2022-01-31 23:38:49,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ba8d3b7/08524e1e200747cb87514237dfd873e9 [2022-01-31 23:38:49,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:38:50,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:38:50,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:38:50,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:38:50,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:38:50,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:38:49" (1/1) ... [2022-01-31 23:38:50,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31688566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50, skipping insertion in model container [2022-01-31 23:38:50,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:38:49" (1/1) ... [2022-01-31 23:38:50,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:38:50,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:38:50,119 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/fermat1-ll_unwindbound1.c[535,548] [2022-01-31 23:38:50,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:38:50,144 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:38:50,151 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/fermat1-ll_unwindbound1.c[535,548] [2022-01-31 23:38:50,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:38:50,173 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:38:50,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50 WrapperNode [2022-01-31 23:38:50,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:38:50,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:38:50,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:38:50,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:38:50,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:38:50,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:38:50,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:38:50,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:38:50,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (1/1) ... [2022-01-31 23:38:50,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:38:50,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:38:50,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 23:38:50,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:38:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:38:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:38:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:38:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:38:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:38:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:38:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:38:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:38:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:38:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:38:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:38:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:38:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:38:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:38:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:38:50,314 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:38:50,315 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:38:50,428 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:38:50,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:38:50,432 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 23:38:50,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:38:50 BoogieIcfgContainer [2022-01-31 23:38:50,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:38:50,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:38:50,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:38:50,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:38:50,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:38:49" (1/3) ... [2022-01-31 23:38:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e48089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:38:50, skipping insertion in model container [2022-01-31 23:38:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:38:50" (2/3) ... [2022-01-31 23:38:50,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e48089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:38:50, skipping insertion in model container [2022-01-31 23:38:50,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:38:50" (3/3) ... [2022-01-31 23:38:50,439 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound1.c [2022-01-31 23:38:50,442 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:38:50,443 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:38:50,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:38:50,475 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 [2022-01-31 23:38:50,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:38:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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) [2022-01-31 23:38:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 23:38:50,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:38:50,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:38:50,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:38:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:38:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2022-01-31 23:38:50,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:38:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466702045] [2022-01-31 23:38:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:38:50,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:38:50,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:38:50,621 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 23:38:50,622 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 23:38:50,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:38:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:38:50,634 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-31 23:38:50,636 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:38:50,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:38:50 BoogieIcfgContainer [2022-01-31 23:38:50,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:38:50,644 INFO L158 Benchmark]: Toolchain (without parser) took 643.38ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 134.4MB in the beginning and 175.4MB in the end (delta: -41.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:38:50,644 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 190.8MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:38:50,645 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.59ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 134.3MB in the beginning and 202.1MB in the end (delta: -67.9MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-01-31 23:38:50,645 INFO L158 Benchmark]: Boogie Preprocessor took 18.99ms. Allocated memory is still 229.6MB. Free memory was 202.1MB in the beginning and 201.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 23:38:50,646 INFO L158 Benchmark]: RCFGBuilder took 239.55ms. Allocated memory is still 229.6MB. Free memory was 200.6MB in the beginning and 188.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 23:38:50,646 INFO L158 Benchmark]: TraceAbstraction took 208.74ms. Allocated memory is still 229.6MB. Free memory was 187.5MB in the beginning and 175.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 23:38:50,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 190.8MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.59ms. Allocated memory was 190.8MB in the beginning and 229.6MB in the end (delta: 38.8MB). Free memory was 134.3MB in the beginning and 202.1MB in the end (delta: -67.9MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.99ms. Allocated memory is still 229.6MB. Free memory was 202.1MB in the beginning and 201.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 239.55ms. Allocated memory is still 229.6MB. Free memory was 200.6MB in the beginning and 188.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 208.74ms. Allocated memory is still 229.6MB. Free memory was 187.5MB in the beginning and 175.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. 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] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND TRUE !cond [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND TRUE !cond [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, 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 [2022-01-31 23:38:50,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...