/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 DAGSIZE --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 [2020-07-20 22:41:33,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:41:33,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:41:33,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 22:41:33,978 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 22:41:34,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:41:34,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:41:34,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:41:34,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:41:34,021 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:41:34,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:41:34,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:41:34,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:41:34,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:41:34,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:41:34,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:41:34,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:41:34,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:41:34,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:41:34,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:41:34,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:41:34,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:41:34,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:41:34,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:41:34,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:41:34,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:41:34,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:41:34,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:41:34,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:41:34,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:41:34,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:41:34,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:34,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:41:34,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:41:34,029 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 -> DAGSIZE 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 22:41:34,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:41:34,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:41:34,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:41:34,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:41:34,439 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:41:34,440 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-07-20 22:41:34,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6c905fb/abb025e3e6884f52ab8e66e5c339b241/FLAGfa0046b89 [2020-07-20 22:41:35,053 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:41:35,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2020-07-20 22:41:35,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6c905fb/abb025e3e6884f52ab8e66e5c339b241/FLAGfa0046b89 [2020-07-20 22:41:35,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6c905fb/abb025e3e6884f52ab8e66e5c339b241 [2020-07-20 22:41:35,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:41:35,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:41:35,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:41:35,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:41:35,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:41:35,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763ba077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35, skipping insertion in model container [2020-07-20 22:41:35,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:41:35,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:41:35,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:41:35,837 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:41:35,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:41:35,881 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:41:35,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35 WrapperNode [2020-07-20 22:41:35,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:41:35,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:41:35,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:41:35,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:41:35,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (1/1) ... [2020-07-20 22:41:35,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:41:35,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:41:35,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:41:35,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:41:35,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (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 22:41:36,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:41:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:41:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:41:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:41:36,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:41:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:41:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:41:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:41:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:41:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:41:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:41:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:41:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:41:36,442 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:41:36,443 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:41:36,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:36 BoogieIcfgContainer [2020-07-20 22:41:36,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:41:36,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:41:36,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:41:36,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:41:36,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:41:35" (1/3) ... [2020-07-20 22:41:36,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a24803d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:36, skipping insertion in model container [2020-07-20 22:41:36,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:35" (2/3) ... [2020-07-20 22:41:36,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a24803d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:36, skipping insertion in model container [2020-07-20 22:41:36,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:36" (3/3) ... [2020-07-20 22:41:36,460 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2020-07-20 22:41:36,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:41:36,479 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:41:36,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:41:36,528 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:41:36,529 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:41:36,529 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:41:36,529 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:41:36,530 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:41:36,530 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:41:36,530 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:41:36,530 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:41:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:41:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:41:36,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:36,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:36,563 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash 651998901, now seen corresponding path program 1 times [2020-07-20 22:41:36,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:36,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906527537] [2020-07-20 22:41:36,584 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 22:41:36,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:41:36,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:41:36,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:36,779 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:41:36,825 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 22:41:36,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:41:36,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906527537] [2020-07-20 22:41:36,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:41:36,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:41:36,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494919858] [2020-07-20 22:41:36,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:41:36,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:41:36,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:41:36,889 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-20 22:41:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:36,999 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 22:41:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:41:37,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:41:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:37,012 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:41:37,013 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 22:41:37,016 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 [2020-07-20 22:41:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 22:41:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-20 22:41:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 22:41:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-20 22:41:37,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-07-20 22:41:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:37,066 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-20 22:41:37,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:41:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-20 22:41:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:41:37,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:41:37,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:41:37,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:37,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:41:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:41:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1822329080, now seen corresponding path program 1 times [2020-07-20 22:41:37,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:41:37,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432036514] [2020-07-20 22:41:37,283 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 22:41:37,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:41:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:41:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:41:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:41:37,355 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:41:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:37,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:41:37,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:41:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:41:37,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432036514] [2020-07-20 22:41:37,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:41:37,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 22:41:37,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833612115] [2020-07-20 22:41:37,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:41:37,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:41:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:41:37,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:41:37,493 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-20 22:41:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:41:37,585 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 22:41:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:41:37,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 22:41:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:41:37,587 INFO L225 Difference]: With dead ends: 25 [2020-07-20 22:41:37,588 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:41:37,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:41:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:41:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:41:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:41:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:41:37,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-20 22:41:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:41:37,592 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:41:37,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:41:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:41:37,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:41:37,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:41:37,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:41:37,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:41:37,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:41:37,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:41:37,903 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:41:37,904 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:41:37,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:41:37,905 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:41:37,905 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:41:37,905 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:41:37,905 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:41:37,906 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-07-20 22:41:37,906 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-20 22:41:37,906 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (< main_~i~0 1000000) [2020-07-20 22:41:37,906 INFO L268 CegarLoopResult]: For program point L16-1(lines 15 17) no Hoare annotation was computed. [2020-07-20 22:41:37,907 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (<= main_~i~0 1000000) [2020-07-20 22:41:37,908 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 19) no Hoare annotation was computed. [2020-07-20 22:41:37,908 INFO L268 CegarLoopResult]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2020-07-20 22:41:37,908 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:41:37,908 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:41:37,908 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:41:37,909 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:41:37,909 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:41:37,909 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:41:37,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:41:37 BoogieIcfgContainer [2020-07-20 22:41:37,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:41:37,932 INFO L168 Benchmark]: Toolchain (without parser) took 2476.81 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 104.7 MB in the beginning and 117.0 MB in the end (delta: -12.2 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,934 INFO L168 Benchmark]: CDTParser took 0.60 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.16 ms. Allocated memory is still 146.8 MB. Free memory was 104.5 MB in the beginning and 95.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,936 INFO L168 Benchmark]: Boogie Preprocessor took 46.93 ms. Allocated memory is still 146.8 MB. Free memory was 95.2 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,937 INFO L168 Benchmark]: RCFGBuilder took 515.36 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 93.6 MB in the beginning and 174.3 MB in the end (delta: -80.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,938 INFO L168 Benchmark]: TraceAbstraction took 1478.06 ms. Allocated memory is still 206.6 MB. Free memory was 173.6 MB in the beginning and 117.0 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:41:37,942 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.16 ms. Allocated memory is still 146.8 MB. Free memory was 104.5 MB in the beginning and 95.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.93 ms. Allocated memory is still 146.8 MB. Free memory was 95.2 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 515.36 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 93.6 MB in the beginning and 174.3 MB in the end (delta: -80.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1478.06 ms. Allocated memory is still 206.6 MB. Free memory was 173.6 MB in the beginning and 117.0 MB in the end (delta: 56.7 MB). Peak memory consumption was 56.7 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: 1.2s, 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, 0.3s InterpolantComputationTime, 27 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 1113 SizeOfPredicates, 4 NumberOfNonLiveVariables, 39 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...