/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/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:11:51,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:11:51,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:11:51,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:11:51,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:11:51,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:11:51,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:11:51,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:11:51,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:11:51,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:11:51,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:11:51,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:11:51,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:11:51,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:11:51,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:11:51,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:11:51,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:11:51,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:11:51,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:11:51,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:11:51,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:11:51,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:11:51,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:11:51,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:11:51,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:11:51,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:11:51,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:11:51,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:11:51,394 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 23:11:51,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:11:51,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:11:51,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:11:51,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:11:51,411 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:11:51,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:11:51,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:11:51,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:11:51,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:11:51,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:11:51,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:11:51,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:11:51,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:11:51,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:11:51,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:11:51,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:11:51,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:11:51,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:11:51,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:11:51,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:11:51,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:11:51,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:11:51,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:11:51,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:11:51,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:11:51,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:11:51,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:51,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:11:51,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:11:51,416 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 23:11:51,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:11:51,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:11:51,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:11:51,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:11:51,734 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:11:51,735 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2020-07-21 23:11:51,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd4f15f0/48751bf0fadc4faebc72cb97877164f1/FLAG3a25b059b [2020-07-21 23:11:52,229 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:11:52,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c [2020-07-21 23:11:52,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd4f15f0/48751bf0fadc4faebc72cb97877164f1/FLAG3a25b059b [2020-07-21 23:11:52,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbd4f15f0/48751bf0fadc4faebc72cb97877164f1 [2020-07-21 23:11:52,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:11:52,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:11:52,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:52,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:11:52,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:11:52,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@beaa35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52, skipping insertion in model container [2020-07-21 23:11:52,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:11:52,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:11:52,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:52,840 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:11:52,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:52,878 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:11:52,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52 WrapperNode [2020-07-21 23:11:52,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:52,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:11:52,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:11:52,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:11:52,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:11:52,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:11:52,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:11:52,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:11:52,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (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 23:11:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:11:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:11:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:11:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-21 23:11:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:11:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:11:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:11:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:11:53,259 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:11:53,260 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:11:53,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:53 BoogieIcfgContainer [2020-07-21 23:11:53,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:11:53,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:11:53,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:11:53,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:11:53,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:11:52" (1/3) ... [2020-07-21 23:11:53,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebc7219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:53, skipping insertion in model container [2020-07-21 23:11:53,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52" (2/3) ... [2020-07-21 23:11:53,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebc7219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:53, skipping insertion in model container [2020-07-21 23:11:53,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:53" (3/3) ... [2020-07-21 23:11:53,301 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2020-07-21 23:11:53,327 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:11:53,344 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:11:53,368 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:11:53,391 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:11:53,391 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:11:53,391 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:11:53,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:11:53,392 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:11:53,392 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:11:53,392 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:11:53,392 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:11:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 23:11:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:11:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:53,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:11:53,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:11:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:11:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-07-21 23:11:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:11:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200163003] [2020-07-21 23:11:53,435 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 23:11:53,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:11:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:11:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:53,532 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 23:11:53,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:53,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200163003] [2020-07-21 23:11:53,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:53,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:11:53,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389571655] [2020-07-21 23:11:53,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:11:53,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:11:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:11:53,554 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-21 23:11:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:53,573 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-21 23:11:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:11:53,574 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 23:11:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:53,584 INFO L225 Difference]: With dead ends: 35 [2020-07-21 23:11:53,584 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 23:11:53,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 23:11:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 23:11:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 23:11:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 23:11:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 23:11:53,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-07-21 23:11:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:53,625 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 23:11:53,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:11:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 23:11:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:11:53,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:53,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:11:53,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:53,834 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:11:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:11:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-07-21 23:11:53,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:11:53,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655324948] [2020-07-21 23:11:53,836 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 23:11:53,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:11:53,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:11:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:53,898 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:11:53,940 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 23:11:53,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:53,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655324948] [2020-07-21 23:11:53,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:53,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:11:53,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236538990] [2020-07-21 23:11:53,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:11:53,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:53,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:11:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:11:53,945 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-07-21 23:11:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:53,994 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-07-21 23:11:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:11:53,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 23:11:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:53,995 INFO L225 Difference]: With dead ends: 18 [2020-07-21 23:11:53,995 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:11:53,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:11:53,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:11:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:11:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:11:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:11:53,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-21 23:11:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:53,999 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:11:53,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:11:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:11:54,004 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:11:54,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:54,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:11:54,316 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,316 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:11:54,317 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,317 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 15 17) no Hoare annotation was computed. [2020-07-21 23:11:54,317 INFO L271 CegarLoopResult]: At program point fooENTRY(lines 15 17) the Hoare annotation is: true [2020-07-21 23:11:54,317 INFO L268 CegarLoopResult]: For program point fooFINAL(lines 15 17) no Hoare annotation was computed. [2020-07-21 23:11:54,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,318 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2020-07-21 23:11:54,318 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:11:54,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,319 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 19 27) the Hoare annotation is: (or (not (<= |old(~x~0)| 0)) (<= ~x~0 0)) [2020-07-21 23:11:54,319 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 19 27) no Hoare annotation was computed. [2020-07-21 23:11:54,319 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-07-21 23:11:54,319 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-07-21 23:11:54,319 INFO L271 CegarLoopResult]: At program point L24-1(lines 21 25) the Hoare annotation is: true [2020-07-21 23:11:54,320 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-21 23:11:54,320 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 25) the Hoare annotation is: (or (not (<= |old(~x~0)| 0)) (<= ~x~0 0)) [2020-07-21 23:11:54,320 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 19 27) no Hoare annotation was computed. [2020-07-21 23:11:54,320 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 23:11:54,321 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:11:54,321 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 23:11:54,321 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:11:54,321 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 23:11:54,322 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:11:54,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:11:54 BoogieIcfgContainer [2020-07-21 23:11:54,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:11:54,336 INFO L168 Benchmark]: Toolchain (without parser) took 1717.90 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 125.8 MB in the end (delta: -24.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,337 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.90 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,339 INFO L168 Benchmark]: Boogie Preprocessor took 36.58 ms. Allocated memory is still 137.9 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,340 INFO L168 Benchmark]: RCFGBuilder took 345.91 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.2 MB in the beginning and 167.7 MB in the end (delta: -77.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,341 INFO L168 Benchmark]: TraceAbstraction took 1054.09 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 125.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,345 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.90 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.58 ms. Allocated memory is still 137.9 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.91 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.2 MB in the beginning and 167.7 MB in the end (delta: -77.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1054.09 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 125.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 6 SDslu, 41 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 10 LocationsWithAnnotation, 12 PreInvPairs, 13 NumberOfFragments, 26 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 260 SizeOfPredicates, 3 NumberOfNonLiveVariables, 57 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...