/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:39:06,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:39:06,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:39:06,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:39:06,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:39:06,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:39:06,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:39:06,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:39:06,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:39:06,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:39:06,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:39:06,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:39:06,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:39:06,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:39:06,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:39:06,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:39:06,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:39:06,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:39:06,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:39:06,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:39:06,571 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 23:39:06,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:39:06,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:39:06,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:39:06,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:39:06,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:39:06,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:39:06,579 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:39:06,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:39:06,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:39:06,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:39:06,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:39:06,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:39:06,781 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:39:06,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2022-01-31 23:39:06,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025/FLAG8f2bdab81 [2022-01-31 23:39:07,203 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:39:07,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2022-01-31 23:39:07,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025/FLAG8f2bdab81 [2022-01-31 23:39:07,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9ae5963a/5ab6b70265cf4ee38605eee1b4a85025 [2022-01-31 23:39:07,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:39:07,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:39:07,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:39:07,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:39:07,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:39:07,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7fdf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07, skipping insertion in model container [2022-01-31 23:39:07,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:39:07,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:39:07,363 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_valuebound50.c[535,548] [2022-01-31 23:39:07,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:39:07,383 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:39:07,390 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_valuebound50.c[535,548] [2022-01-31 23:39:07,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:39:07,403 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:39:07,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07 WrapperNode [2022-01-31 23:39:07,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:39:07,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:39:07,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:39:07,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:39:07,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:39:07,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:39:07,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:39:07,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:39:07,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (1/1) ... [2022-01-31 23:39:07,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:39:07,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:39:07,460 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 23:39:07,479 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 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:39:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:39:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:39:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:39:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:39:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:39:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:39:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:39:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:39:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:39:07,535 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:39:07,536 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:39:07,691 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:39:07,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:39:07,695 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 23:39:07,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:07 BoogieIcfgContainer [2022-01-31 23:39:07,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:39:07,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:39:07,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:39:07,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:39:07,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:39:07" (1/3) ... [2022-01-31 23:39:07,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142be992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:07, skipping insertion in model container [2022-01-31 23:39:07,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:39:07" (2/3) ... [2022-01-31 23:39:07,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142be992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:39:07, skipping insertion in model container [2022-01-31 23:39:07,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:39:07" (3/3) ... [2022-01-31 23:39:07,713 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound50.c [2022-01-31 23:39:07,724 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:39:07,724 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:39:07,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:39:07,756 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 23:39:07,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:39:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:39:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:39:07,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:39:07,775 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] [2022-01-31 23:39:07,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:39:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:39:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times [2022-01-31 23:39:07,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:39:07,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182068361] [2022-01-31 23:39:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:39:07,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:39:07,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:39:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:39:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:39:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:39:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:39:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 23:39:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 23:39:07,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:39:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182068361] [2022-01-31 23:39:07,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182068361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:39:07,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:39:07,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:39:07,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251698011] [2022-01-31 23:39:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:39:07,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:39:07,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:39:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:39:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:39:07,987 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-31 23:39:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:39:08,041 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-01-31 23:39:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:39:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 33 [2022-01-31 23:39:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:39:08,047 INFO L225 Difference]: With dead ends: 67 [2022-01-31 23:39:08,047 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 23:39:08,049 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 [2022-01-31 23:39:08,052 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:39:08,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:39:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 23:39:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 23:39:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 23:39:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-01-31 23:39:08,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2022-01-31 23:39:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:39:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-01-31 23:39:08,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-31 23:39:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-01-31 23:39:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:39:08,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:39:08,088 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] [2022-01-31 23:39:08,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:39:08,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:39:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:39:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times [2022-01-31 23:39:08,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:39:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308784693] [2022-01-31 23:39:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:39:08,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:39:08,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:39:08,105 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 23:39:08,105 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 23:39:08,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:39:08,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:39:08,113 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 23:39:08,114 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:39:08,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:39:08 BoogieIcfgContainer [2022-01-31 23:39:08,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:39:08,122 INFO L158 Benchmark]: Toolchain (without parser) took 892.54ms. Allocated memory is still 194.0MB. Free memory was 141.4MB in the beginning and 122.7MB in the end (delta: 18.7MB). Peak memory consumption was 17.9MB. Max. memory is 8.0GB. [2022-01-31 23:39:08,123 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:39:08,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.62ms. Allocated memory is still 194.0MB. Free memory was 141.2MB in the beginning and 166.2MB in the end (delta: -25.0MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-01-31 23:39:08,124 INFO L158 Benchmark]: Boogie Preprocessor took 17.00ms. Allocated memory is still 194.0MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 23:39:08,124 INFO L158 Benchmark]: RCFGBuilder took 275.07ms. Allocated memory is still 194.0MB. Free memory was 164.6MB in the beginning and 153.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 23:39:08,124 INFO L158 Benchmark]: TraceAbstraction took 421.92ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 122.7MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-01-31 23:39:08,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 157.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.62ms. Allocated memory is still 194.0MB. Free memory was 141.2MB in the beginning and 166.2MB in the end (delta: -25.0MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.00ms. Allocated memory is still 194.0MB. Free memory was 166.2MB in the beginning and 164.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 275.07ms. Allocated memory is still 194.0MB. Free memory was 164.6MB in the beginning and 153.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 421.92ms. Allocated memory is still 194.0MB. Free memory was 152.6MB in the beginning and 122.7MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. 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: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(A>=0 && A<=50) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=50) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=50) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=50) [L26] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == 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: 0.4s, OverallIterations: 2, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 37 mSDtfsCounter, 10 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=37occurred 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 [2022-01-31 23:39:08,164 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...