/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:51:52,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:51:52,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:51:52,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:51:52,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:51:52,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:51:52,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:51:52,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:51:52,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:51:52,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:51:52,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:51:52,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:51:52,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:51:52,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:51:52,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:51:52,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:51:52,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:51:52,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:51:52,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:51:52,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:51:52,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:51:52,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:51:52,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:51:52,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:51:52,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:51:52,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:51:52,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:51:52,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:51:52,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:51:52,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:51:52,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:51:52,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:51:52,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:51:52,431 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:51:52,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:51:52,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:51:52,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:51:52,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:51:52,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:51:52,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:51:52,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:51:52,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:51:52,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:51:52,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:51:52,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:51:52,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:51:52,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:51:52,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:51:52,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:51:52,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:51:52,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:52,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:51:52,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:51:52,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:51:52,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:51:52,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:51:52,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:51:52,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:51:52,717 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:51:52,718 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-07-20 17:51:52,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fa947f2c/e01061042e414ee6b3edd1c826d299a0/FLAG78f419f84 [2020-07-20 17:51:53,231 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:51:53,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-07-20 17:51:53,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fa947f2c/e01061042e414ee6b3edd1c826d299a0/FLAG78f419f84 [2020-07-20 17:51:53,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fa947f2c/e01061042e414ee6b3edd1c826d299a0 [2020-07-20 17:51:53,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:51:53,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:51:53,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:53,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:51:53,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:51:53,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e2313e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53, skipping insertion in model container [2020-07-20 17:51:53,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:51:53,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:51:53,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:53,815 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:51:53,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:53,844 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:51:53,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53 WrapperNode [2020-07-20 17:51:53,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:53,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:51:53,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:51:53,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:51:53,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... [2020-07-20 17:51:53,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:51:53,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:51:53,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:51:53,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:51:53,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:51:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:51:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:51:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:51:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:51:54,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:51:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:51:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:51:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:51:54,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:51:54,227 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:51:54,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:54 BoogieIcfgContainer [2020-07-20 17:51:54,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:51:54,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:51:54,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:51:54,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:51:54,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:51:53" (1/3) ... [2020-07-20 17:51:54,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3036c781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:54, skipping insertion in model container [2020-07-20 17:51:54,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:53" (2/3) ... [2020-07-20 17:51:54,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3036c781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:54, skipping insertion in model container [2020-07-20 17:51:54,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:54" (3/3) ... [2020-07-20 17:51:54,241 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-07-20 17:51:54,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:51:54,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:51:54,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:51:54,338 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:51:54,338 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:51:54,340 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:51:54,340 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:51:54,341 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:51:54,341 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:51:54,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:51:54,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:51:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 17:51:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 17:51:54,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:54,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:54,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 826978896, now seen corresponding path program 1 times [2020-07-20 17:51:54,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:54,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483951689] [2020-07-20 17:51:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:54,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:51:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:51:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:54,521 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:51:54,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:54,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483951689] [2020-07-20 17:51:54,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:54,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:51:54,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042689742] [2020-07-20 17:51:54,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:51:54,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:51:54,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:51:54,573 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-20 17:51:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:51:54,653 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 17:51:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:51:54,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 17:51:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:51:54,661 INFO L225 Difference]: With dead ends: 44 [2020-07-20 17:51:54,661 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 17:51:54,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:51:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 17:51:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 17:51:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 17:51:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 17:51:54,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-07-20 17:51:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:51:54,704 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 17:51:54,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:51:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 17:51:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:51:54,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:54,705 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:54,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:54,920 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1747164342, now seen corresponding path program 1 times [2020-07-20 17:51:54,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:54,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926445287] [2020-07-20 17:51:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:54,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:51:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:51:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:54,986 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:51:55,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:55,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926445287] [2020-07-20 17:51:55,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:55,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:51:55,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594585032] [2020-07-20 17:51:55,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:51:55,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:51:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:51:55,016 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2020-07-20 17:51:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:51:55,078 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-20 17:51:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:51:55,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 17:51:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:51:55,079 INFO L225 Difference]: With dead ends: 21 [2020-07-20 17:51:55,080 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:51:55,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:51:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:51:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:51:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:51:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:51:55,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-20 17:51:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:51:55,083 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:51:55,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:51:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:51:55,085 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:51:55,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:55,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:51:55,392 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:51:55,392 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:51:55,392 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:51:55,393 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:51:55,393 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:51:55,393 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:51:55,393 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:51:55,394 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 17:51:55,395 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:51:55,395 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 17:51:55,395 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-07-20 17:51:55,395 INFO L268 CegarLoopResult]: For program point L31(lines 27 32) no Hoare annotation was computed. [2020-07-20 17:51:55,395 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0)) [2020-07-20 17:51:55,396 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-07-20 17:51:55,396 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0)) [2020-07-20 17:51:55,396 INFO L264 CegarLoopResult]: At program point L27-2(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-07-20 17:51:55,396 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 34) no Hoare annotation was computed. [2020-07-20 17:51:55,401 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 17:51:55,402 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 17:51:55,402 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 34) no Hoare annotation was computed. [2020-07-20 17:51:55,402 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 17:51:55,402 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 17:51:55,402 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 17:51:55,402 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 17:51:55,403 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 17:51:55,403 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 17:51:55,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:51:55 BoogieIcfgContainer [2020-07-20 17:51:55,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:51:55,432 INFO L168 Benchmark]: Toolchain (without parser) took 1814.29 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 102.3 MB in the beginning and 116.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,433 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.82 ms. Allocated memory is still 145.8 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,438 INFO L168 Benchmark]: Boogie Preprocessor took 118.03 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 184.0 MB in the end (delta: -91.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,439 INFO L168 Benchmark]: RCFGBuilder took 268.61 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 170.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,441 INFO L168 Benchmark]: TraceAbstraction took 1193.22 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 116.0 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:51:55,451 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.82 ms. Allocated memory is still 145.8 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.03 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.4 MB in the beginning and 184.0 MB in the end (delta: -91.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.61 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 170.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1193.22 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 116.0 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: glob2_pathlim_off <= MAXPATHLEN && 0 <= glob2_p_off - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 14 SDslu, 97 SDs, 0 SdLazy, 47 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 12 PreInvPairs, 17 NumberOfFragments, 33 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 625 SizeOfPredicates, 9 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...