/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/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:58:25,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:58:25,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:58:25,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:58:25,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:58:25,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:58:25,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:58:25,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:58:25,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:58:25,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:58:25,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:58:25,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:58:25,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:58:25,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:58:25,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:58:25,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:58:25,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:58:25,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:58:25,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:58:25,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:58:25,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:58:25,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:58:25,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:58:25,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:58:25,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:58:25,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:58:25,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:58:25,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:58:25,897 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 01:58:25,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:58:25,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:58:25,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:58:25,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:58:25,921 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:58:25,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:58:25,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:58:25,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:58:25,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:58:25,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:58:25,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:58:25,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:58:25,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:58:25,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:58:25,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:58:25,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:58:25,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:58:25,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:58:25,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:58:25,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:58:25,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:58:25,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:58:25,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:58:25,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:58:25,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:58:25,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:58:25,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:25,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:58:25,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:58:25,926 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 01:58:26,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:58:26,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:58:26,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:58:26,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:58:26,255 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:58:26,256 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-07-21 01:58:26,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850ed4070/c2eb6b61a4714596929a4abd2a78c974/FLAGb15ab9906 [2020-07-21 01:58:26,824 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:58:26,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-07-21 01:58:26,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850ed4070/c2eb6b61a4714596929a4abd2a78c974/FLAGb15ab9906 [2020-07-21 01:58:27,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850ed4070/c2eb6b61a4714596929a4abd2a78c974 [2020-07-21 01:58:27,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:58:27,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:58:27,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:58:27,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:58:27,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:58:27,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e0e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27, skipping insertion in model container [2020-07-21 01:58:27,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:58:27,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:58:27,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:58:27,430 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:58:27,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:58:27,465 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:58:27,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27 WrapperNode [2020-07-21 01:58:27,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:58:27,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:58:27,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:58:27,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:58:27,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (1/1) ... [2020-07-21 01:58:27,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:58:27,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:58:27,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:58:27,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:58:27,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (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 01:58:27,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:58:27,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:58:27,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:58:27,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:58:27,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:58:27,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:58:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:58:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:58:27,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:58:27,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:58:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:58:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:58:27,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:58:27,908 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:58:27,908 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:58:27,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:58:27 BoogieIcfgContainer [2020-07-21 01:58:27,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:58:27,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:58:27,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:58:27,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:58:27,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:58:27" (1/3) ... [2020-07-21 01:58:27,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ea0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:58:27, skipping insertion in model container [2020-07-21 01:58:27,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:58:27" (2/3) ... [2020-07-21 01:58:27,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ea0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:58:27, skipping insertion in model container [2020-07-21 01:58:27,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:58:27" (3/3) ... [2020-07-21 01:58:27,946 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-07-21 01:58:27,983 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:58:28,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:58:28,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:58:28,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:58:28,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:58:28,045 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:58:28,045 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:58:28,046 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:58:28,046 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:58:28,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:58:28,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:58:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 01:58:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:58:28,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:28,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:28,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash 651998901, now seen corresponding path program 1 times [2020-07-21 01:58:28,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:28,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764287393] [2020-07-21 01:58:28,096 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 01:58:28,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:58:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:58:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:28,237 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:58:28,277 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 01:58:28,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:58:28,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764287393] [2020-07-21 01:58:28,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:58:28,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:58:28,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627775460] [2020-07-21 01:58:28,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:58:28,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:58:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:58:28,299 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-21 01:58:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:28,398 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 01:58:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:58:28,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 01:58:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:28,409 INFO L225 Difference]: With dead ends: 40 [2020-07-21 01:58:28,409 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:58:28,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 01:58:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:58:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-21 01:58:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:58:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 01:58:28,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-07-21 01:58:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:28,461 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 01:58:28,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:58:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 01:58:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:58:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:58:28,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:58:28,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:28,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:58:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:58:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1822329080, now seen corresponding path program 1 times [2020-07-21 01:58:28,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:58:28,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445109050] [2020-07-21 01:58:28,679 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 01:58:28,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:58:28,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:58:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:58:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:58:28,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:58:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:28,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:58:28,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:58:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:58:28,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445109050] [2020-07-21 01:58:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:58:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 01:58:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707673530] [2020-07-21 01:58:28,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:58:28,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:58:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:58:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:58:28,834 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 01:58:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:58:28,910 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 01:58:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:58:28,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 01:58:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:58:28,911 INFO L225 Difference]: With dead ends: 25 [2020-07-21 01:58:28,912 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:58:28,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:58:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:58:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:58:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:58:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:58:28,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 01:58:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:58:28,915 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:58:28,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:58:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:58:28,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:58:29,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:58:29,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:58:29,221 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:58:29,222 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:58:29,222 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:58:29,222 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:58:29,222 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:58:29,222 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:58:29,223 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:58:29,223 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:58:29,223 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:58:29,223 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:58:29,224 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-07-21 01:58:29,225 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-21 01:58:29,225 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (< main_~i~0 1000000) [2020-07-21 01:58:29,225 INFO L268 CegarLoopResult]: For program point L16-1(lines 15 17) no Hoare annotation was computed. [2020-07-21 01:58:29,226 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (<= main_~i~0 1000000) [2020-07-21 01:58:29,228 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 19) no Hoare annotation was computed. [2020-07-21 01:58:29,228 INFO L268 CegarLoopResult]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2020-07-21 01:58:29,228 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 01:58:29,229 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:58:29,229 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 01:58:29,229 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 01:58:29,229 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:58:29,229 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 01:58:29,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:58:29 BoogieIcfgContainer [2020-07-21 01:58:29,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:58:29,256 INFO L168 Benchmark]: Toolchain (without parser) took 2047.99 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 103.2 MB in the beginning and 113.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,257 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.14 ms. Allocated memory is still 144.7 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,259 INFO L168 Benchmark]: Boogie Preprocessor took 157.46 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 93.5 MB in the beginning and 184.1 MB in the end (delta: -90.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,260 INFO L168 Benchmark]: RCFGBuilder took 289.23 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 170.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,261 INFO L168 Benchmark]: TraceAbstraction took 1334.31 ms. Allocated memory is still 203.9 MB. Free memory was 170.2 MB in the beginning and 113.6 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:58:29,265 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.14 ms. Allocated memory is still 144.7 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.46 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 93.5 MB in the beginning and 184.1 MB in the end (delta: -90.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.23 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 170.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1334.31 ms. Allocated memory is still 203.9 MB. Free memory was 170.2 MB in the beginning and 113.6 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 10 SDslu, 71 SDs, 0 SdLazy, 51 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 17 NumberOfFragments, 11 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 1113 SizeOfPredicates, 4 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...