/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/ldv-regression/test14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:14:46,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:14:46,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:14:46,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:14:46,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:14:46,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:14:46,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:14:46,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:14:46,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:14:46,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:14:46,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:14:46,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:14:46,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:14:46,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:14:46,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:14:46,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:14:46,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:14:46,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:14:46,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:14:46,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:14:46,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:14:46,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:14:46,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:14:46,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:14:46,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:14:46,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:14:46,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:14:46,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:14:46,555 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 17:14:46,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:14:46,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:14:46,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:14:46,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:14:46,571 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:14:46,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:14:46,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:14:46,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:14:46,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:14:46,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:14:46,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:14:46,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:14:46,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:14:46,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:14:46,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:14:46,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:14:46,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:14:46,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:14:46,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:14:46,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:14:46,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:14:46,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:14:46,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:14:46,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:14:46,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:14:46,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:14:46,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:46,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:14:46,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:14:46,576 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 17:14:46,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:14:46,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:14:46,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:14:46,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:14:46,922 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:14:46,924 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test14.c [2020-07-20 17:14:46,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f91833b1/826bb09bb57643888caeb3111f851b90/FLAG9d3d60de9 [2020-07-20 17:14:47,420 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:14:47,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test14.c [2020-07-20 17:14:47,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f91833b1/826bb09bb57643888caeb3111f851b90/FLAG9d3d60de9 [2020-07-20 17:14:47,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f91833b1/826bb09bb57643888caeb3111f851b90 [2020-07-20 17:14:47,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:14:47,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:14:47,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:47,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:14:47,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:14:47,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:47" (1/1) ... [2020-07-20 17:14:47,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164c7927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:47, skipping insertion in model container [2020-07-20 17:14:47,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:14:47" (1/1) ... [2020-07-20 17:14:47,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:14:47,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:14:48,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:48,011 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:14:48,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:14:48,038 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:14:48,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48 WrapperNode [2020-07-20 17:14:48,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:14:48,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:14:48,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:14:48,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:14:48,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (1/1) ... [2020-07-20 17:14:48,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:14:48,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:14:48,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:14:48,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:14:48,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (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 17:14:48,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:14:48,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:14:48,215 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-07-20 17:14:48,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:14:48,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:14:48,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 17:14:48,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:14:48,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:14:48,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:14:48,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:14:48,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:14:48,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:14:48,502 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:14:48,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:48 BoogieIcfgContainer [2020-07-20 17:14:48,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:14:48,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:14:48,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:14:48,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:14:48,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:14:47" (1/3) ... [2020-07-20 17:14:48,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26520aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:48, skipping insertion in model container [2020-07-20 17:14:48,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:14:48" (2/3) ... [2020-07-20 17:14:48,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26520aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:14:48, skipping insertion in model container [2020-07-20 17:14:48,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:14:48" (3/3) ... [2020-07-20 17:14:48,525 INFO L109 eAbstractionObserver]: Analyzing ICFG test14.c [2020-07-20 17:14:48,536 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:14:48,544 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:14:48,565 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:14:48,590 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:14:48,590 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:14:48,590 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:14:48,590 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:14:48,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:14:48,591 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:14:48,591 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:14:48,591 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:14:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 17:14:48,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 17:14:48,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:48,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:48,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash 521841741, now seen corresponding path program 1 times [2020-07-20 17:14:48,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:48,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019474487] [2020-07-20 17:14:48,633 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 17:14:48,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:48,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:14:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:48,850 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:14:48,864 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 17:14:48,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:48,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019474487] [2020-07-20 17:14:48,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:48,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:14:48,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940915636] [2020-07-20 17:14:48,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:14:48,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:48,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:14:48,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:14:48,892 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-20 17:14:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:48,971 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-20 17:14:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:14:48,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 17:14:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:48,982 INFO L225 Difference]: With dead ends: 29 [2020-07-20 17:14:48,982 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 17:14:48,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 17:14:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 17:14:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 17:14:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 17:14:49,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-07-20 17:14:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:49,022 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 17:14:49,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:14:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 17:14:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 17:14:49,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:14:49,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:14:49,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:49,231 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:14:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:14:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1019657549, now seen corresponding path program 1 times [2020-07-20 17:14:49,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:14:49,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445131418] [2020-07-20 17:14:49,234 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 17:14:49,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:14:49,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:14:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:14:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:14:49,343 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:14:49,352 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 17:14:49,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:14:49,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445131418] [2020-07-20 17:14:49,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:14:49,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:14:49,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066515625] [2020-07-20 17:14:49,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:14:49,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:14:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:14:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:14:49,356 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-07-20 17:14:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:14:49,398 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-07-20 17:14:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:14:49,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 17:14:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:14:49,399 INFO L225 Difference]: With dead ends: 18 [2020-07-20 17:14:49,400 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:14:49,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:14:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:14:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:14:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:14:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:14:49,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-20 17:14:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:14:49,402 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:14:49,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:14:49,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:14:49,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:14:49,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:14:49,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:14:49,704 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:49,705 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:14:49,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:49,705 INFO L268 CegarLoopResult]: For program point get_dummyFINAL(lines 7 10) no Hoare annotation was computed. [2020-07-20 17:14:49,706 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 17:14:49,706 INFO L271 CegarLoopResult]: At program point get_dummyENTRY(lines 7 10) the Hoare annotation is: true [2020-07-20 17:14:49,706 INFO L268 CegarLoopResult]: For program point get_dummyEXIT(lines 7 10) no Hoare annotation was computed. [2020-07-20 17:14:49,706 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:14:49,706 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (< 0 |#StackHeapBarrier|) [2020-07-20 17:14:49,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:14:49,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:14:49,707 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-07-20 17:14:49,707 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2020-07-20 17:14:49,708 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2020-07-20 17:14:49,714 INFO L264 CegarLoopResult]: At program point L20(lines 12 27) the Hoare annotation is: (not (< 0 |#StackHeapBarrier|)) [2020-07-20 17:14:49,714 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-20 17:14:49,714 INFO L268 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-07-20 17:14:49,714 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (<= 2 main_~pc~0.base) (not (< 0 |#StackHeapBarrier|))) [2020-07-20 17:14:49,715 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-07-20 17:14:49,715 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-07-20 17:14:49,715 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 21) no Hoare annotation was computed. [2020-07-20 17:14:49,718 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2020-07-20 17:14:49,729 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 17:14:49,735 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 17:14:49,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:14:49 BoogieIcfgContainer [2020-07-20 17:14:49,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:14:49,744 INFO L168 Benchmark]: Toolchain (without parser) took 1949.59 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 103.5 MB in the end (delta: 650.4 kB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,746 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.08 ms. Allocated memory is still 146.8 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,750 INFO L168 Benchmark]: Boogie Preprocessor took 119.29 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.0 MB in the beginning and 182.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,752 INFO L168 Benchmark]: RCFGBuilder took 354.17 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 165.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,753 INFO L168 Benchmark]: TraceAbstraction took 1224.39 ms. Allocated memory is still 203.9 MB. Free memory was 165.1 MB in the beginning and 103.5 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:14:49,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.08 ms. Allocated memory is still 146.8 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.29 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.0 MB in the beginning and 182.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.17 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 165.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1224.39 ms. Allocated memory is still 203.9 MB. Free memory was 165.1 MB in the beginning and 103.5 MB in the end (delta: 61.5 MB). Peak memory consumption was 61.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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: 12]: Loop Invariant [2020-07-20 17:14:49,786 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-20 17:14:49,786 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: !(0 < unknown-#StackHeapBarrier-unknown) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 32 SDslu, 63 SDs, 0 SdLazy, 15 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 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, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 19 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 858 SizeOfPredicates, 12 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 16 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...