/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 BIGGEST_EQUIVALENCE_CLASS --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/loops/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:11:57,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:11:57,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:11:57,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:11:57,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:11:57,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:11:57,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:11:57,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:11:57,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:11:57,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:11:57,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:11:57,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:11:57,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:11:57,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:11:57,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:11:57,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:11:57,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:11:57,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:11:57,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:11:57,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:11:57,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:11:57,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:11:57,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:11:57,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:11:57,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:11:57,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:11:57,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:11:57,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:11:57,372 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 [2020-07-21 23:11:57,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:11:57,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:11:57,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:11:57,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:11:57,411 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:11:57,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:11:57,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:11:57,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:11:57,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:11:57,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:11:57,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:11:57,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:11:57,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:11:57,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:11:57,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:11:57,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:11:57,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:11:57,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:11:57,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:11:57,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:11:57,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:11:57,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:11:57,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:11:57,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:11:57,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:11:57,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:11:57,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:57,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:11:57,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:11:57,420 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 23:11:57,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:11:57,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:11:57,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:11:57,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:11:57,743 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:11:57,744 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2020-07-21 23:11:57,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b4f02d4/aa8caefea9a04cb5a64eee8d15642e73/FLAG916c6ca07 [2020-07-21 23:11:58,338 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:11:58,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2020-07-21 23:11:58,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b4f02d4/aa8caefea9a04cb5a64eee8d15642e73/FLAG916c6ca07 [2020-07-21 23:11:58,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b4f02d4/aa8caefea9a04cb5a64eee8d15642e73 [2020-07-21 23:11:58,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:11:58,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:11:58,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:58,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:11:58,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:11:58,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:58" (1/1) ... [2020-07-21 23:11:58,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ebf14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:58, skipping insertion in model container [2020-07-21 23:11:58,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:58" (1/1) ... [2020-07-21 23:11:58,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:11:58,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:11:58,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:58,996 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:11:59,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:59,033 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:11:59,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59 WrapperNode [2020-07-21 23:11:59,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:59,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:11:59,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:11:59,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:11:59,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (1/1) ... [2020-07-21 23:11:59,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:11:59,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:11:59,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:11:59,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:11:59,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (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 [2020-07-21 23:11:59,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:11:59,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:11:59,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:11:59,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:11:59,227 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-21 23:11:59,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:11:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:11:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-21 23:11:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:11:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:11:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:11:59,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:11:59,496 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:11:59,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:59 BoogieIcfgContainer [2020-07-21 23:11:59,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:11:59,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:11:59,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:11:59,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:11:59,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:11:58" (1/3) ... [2020-07-21 23:11:59,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:59, skipping insertion in model container [2020-07-21 23:11:59,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:59" (2/3) ... [2020-07-21 23:11:59,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdf69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:59, skipping insertion in model container [2020-07-21 23:11:59,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:59" (3/3) ... [2020-07-21 23:11:59,511 INFO L109 eAbstractionObserver]: Analyzing ICFG trex04.c [2020-07-21 23:11:59,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:11:59,531 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:11:59,555 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:11:59,587 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:11:59,588 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:11:59,588 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:11:59,589 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:11:59,589 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:11:59,589 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:11:59,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:11:59,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:11:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-21 23:11:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:11:59,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:59,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:11:59,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:11:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:11:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1434576833, now seen corresponding path program 1 times [2020-07-21 23:11:59,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:11:59,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805562156] [2020-07-21 23:11:59,694 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 [2020-07-21 23:11:59,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:11:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:59,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:11:59,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:11:59,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:59,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805562156] [2020-07-21 23:11:59,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:59,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:11:59,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751489902] [2020-07-21 23:11:59,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:11:59,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:11:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:11:59,838 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-21 23:11:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:59,863 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 23:11:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:11:59,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-07-21 23:11:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:59,874 INFO L225 Difference]: With dead ends: 41 [2020-07-21 23:11:59,874 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 23:11:59,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:11:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 23:11:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 23:11:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 23:11:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-07-21 23:11:59,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2020-07-21 23:11:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:59,923 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-07-21 23:11:59,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:11:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-07-21 23:11:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:11:59,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:59,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:12:00,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:12:00,134 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:12:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:12:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1438270917, now seen corresponding path program 1 times [2020-07-21 23:12:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:12:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517642659] [2020-07-21 23:12:00,137 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 [2020-07-21 23:12:00,190 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:12:00,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:12:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:12:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:12:00,233 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:12:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:12:00,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:12:00,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517642659] [2020-07-21 23:12:00,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:12:00,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:12:00,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222584494] [2020-07-21 23:12:00,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:12:00,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:12:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:12:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:12:00,273 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-07-21 23:12:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:12:00,314 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-07-21 23:12:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:12:00,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 23:12:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:12:00,316 INFO L225 Difference]: With dead ends: 24 [2020-07-21 23:12:00,316 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:12:00,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:12:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:12:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:12:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:12:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:12:00,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 23:12:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:12:00,319 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:12:00,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:12:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:12:00,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:12:00,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:12:00,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:12:00,602 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:12:00,603 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:12:00,603 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 16 23) no Hoare annotation was computed. [2020-07-21 23:12:00,603 INFO L271 CegarLoopResult]: At program point fooENTRY(lines 16 23) the Hoare annotation is: true [2020-07-21 23:12:00,603 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 23:12:00,603 INFO L268 CegarLoopResult]: For program point L21-1(lines 16 23) no Hoare annotation was computed. [2020-07-21 23:12:00,604 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-07-21 23:12:00,604 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:12:00,604 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:12:00,604 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:12:00,604 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:12:00,604 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:12:00,605 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 23:12:00,605 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:12:00,605 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:12:00,605 INFO L271 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-07-21 23:12:00,605 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-07-21 23:12:00,606 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-07-21 23:12:00,606 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 46) no Hoare annotation was computed. [2020-07-21 23:12:00,606 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 46) no Hoare annotation was computed. [2020-07-21 23:12:00,606 INFO L268 CegarLoopResult]: For program point L40-1(lines 26 46) no Hoare annotation was computed. [2020-07-21 23:12:00,606 INFO L264 CegarLoopResult]: At program point L40-2(lines 40 43) the Hoare annotation is: (<= main_~x~0 0) [2020-07-21 23:12:00,607 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-21 23:12:00,607 INFO L268 CegarLoopResult]: For program point L32-2(lines 26 46) no Hoare annotation was computed. [2020-07-21 23:12:00,607 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 46) the Hoare annotation is: true [2020-07-21 23:12:00,607 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-07-21 23:12:00,607 INFO L271 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: true [2020-07-21 23:12:00,608 INFO L268 CegarLoopResult]: For program point L37-3(lines 26 46) no Hoare annotation was computed. [2020-07-21 23:12:00,608 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-21 23:12:00,608 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-21 23:12:00,608 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-21 23:12:00,608 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-21 23:12:00,609 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-21 23:12:00,609 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-21 23:12:00,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:12:00 BoogieIcfgContainer [2020-07-21 23:12:00,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:12:00,619 INFO L168 Benchmark]: Toolchain (without parser) took 1889.95 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.0 MB in the beginning and 124.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,620 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.55 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 90.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,622 INFO L168 Benchmark]: Boogie Preprocessor took 115.20 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 180.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,623 INFO L168 Benchmark]: RCFGBuilder took 351.11 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 165.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,624 INFO L168 Benchmark]: TraceAbstraction took 1113.17 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 124.1 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:00,628 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.55 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 90.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.20 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 180.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.11 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 165.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1113.17 ms. Allocated memory is still 201.9 MB. Free memory was 165.2 MB in the beginning and 124.1 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 79 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 11 PreInvPairs, 12 NumberOfFragments, 11 HoareAnnotationTreeSize, 11 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, 32 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 SizeOfPredicates, 2 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...