/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:49:24,283 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:49:24,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:49:24,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:49:24,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:49:24,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:49:24,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:49:24,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:49:24,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:49:24,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:49:24,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:49:24,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:49:24,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:49:24,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:49:24,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:49:24,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:49:24,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:49:24,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:49:24,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:49:24,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:49:24,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:49:24,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:49:24,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:49:24,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:49:24,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:49:24,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:49:24,363 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 01:49:24,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:49:24,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:49:24,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:49:24,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:49:24,392 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:49:24,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:49:24,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:49:24,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:49:24,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:49:24,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:49:24,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:49:24,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:49:24,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:49:24,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:49:24,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:49:24,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:49:24,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:49:24,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:49:24,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:49:24,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:49:24,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:49:24,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:49:24,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:49:24,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:49:24,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:49:24,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:49:24,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:24,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:49:24,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:49:24,398 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 01:49:24,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:49:24,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:49:24,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:49:24,786 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:49:24,787 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:49:24,788 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-21 01:49:24,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c979ec05c/646529d263114cfd82fd95a89689b2e3/FLAGc8ef8a358 [2020-07-21 01:49:25,410 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:49:25,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-21 01:49:25,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c979ec05c/646529d263114cfd82fd95a89689b2e3/FLAGc8ef8a358 [2020-07-21 01:49:25,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c979ec05c/646529d263114cfd82fd95a89689b2e3 [2020-07-21 01:49:25,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:49:25,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:49:25,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:49:25,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:49:25,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:49:25,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:49:25" (1/1) ... [2020-07-21 01:49:25,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd00d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:25, skipping insertion in model container [2020-07-21 01:49:25,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:49:25" (1/1) ... [2020-07-21 01:49:25,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:49:25,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:49:26,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:49:26,022 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:49:26,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:49:26,057 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:49:26,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26 WrapperNode [2020-07-21 01:49:26,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:49:26,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:49:26,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:49:26,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:49:26,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (1/1) ... [2020-07-21 01:49:26,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:49:26,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:49:26,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:49:26,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:49:26,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (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 01:49:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:49:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:49:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:49:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:49:26,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:49:26,453 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:49:26,453 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:49:26,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:49:26 BoogieIcfgContainer [2020-07-21 01:49:26,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:49:26,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:49:26,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:49:26,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:49:26,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:49:25" (1/3) ... [2020-07-21 01:49:26,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa95e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:49:26, skipping insertion in model container [2020-07-21 01:49:26,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:49:26" (2/3) ... [2020-07-21 01:49:26,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa95e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:49:26, skipping insertion in model container [2020-07-21 01:49:26,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:49:26" (3/3) ... [2020-07-21 01:49:26,468 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-07-21 01:49:26,480 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:49:26,489 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:49:26,519 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:49:26,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:49:26,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:49:26,577 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:49:26,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:49:26,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:49:26,578 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:49:26,578 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:49:26,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:49:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 01:49:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:49:26,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:49:26,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:49:26,615 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:49:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:49:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1473011041, now seen corresponding path program 1 times [2020-07-21 01:49:26,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:49:26,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642657109] [2020-07-21 01:49:26,634 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 01:49:26,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:49:26,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:49:26,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:49:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:49:26,753 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 01:49:26,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:49:26,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642657109] [2020-07-21 01:49:26,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:49:26,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:49:26,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047229262] [2020-07-21 01:49:26,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:49:26,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:49:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:49:26,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:49:26,786 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 01:49:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:49:26,812 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 01:49:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:49:26,815 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 01:49:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:49:26,825 INFO L225 Difference]: With dead ends: 33 [2020-07-21 01:49:26,826 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:49:26,831 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 01:49:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:49:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:49:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:49:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 01:49:26,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 01:49:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:49:26,883 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 01:49:26,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:49:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 01:49:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:49:26,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:49:26,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:49:27,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:27,102 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:49:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:49:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1462852310, now seen corresponding path program 1 times [2020-07-21 01:49:27,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:49:27,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657222425] [2020-07-21 01:49:27,104 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 01:49:27,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:49:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:49:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 01:49:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:49:27,264 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:49:27,307 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 01:49:27,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:49:27,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657222425] [2020-07-21 01:49:27,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:49:27,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:49:27,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804383645] [2020-07-21 01:49:27,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:49:27,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:49:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:49:27,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:49:27,312 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 01:49:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:49:27,421 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-07-21 01:49:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:49:27,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 01:49:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:49:27,425 INFO L225 Difference]: With dead ends: 21 [2020-07-21 01:49:27,425 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 01:49:27,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:49:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 01:49:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-21 01:49:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:49:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 01:49:27,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 01:49:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:49:27,434 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 01:49:27,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:49:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 01:49:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:49:27,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:49:27,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:49:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:27,652 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:49:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:49:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash 467761921, now seen corresponding path program 1 times [2020-07-21 01:49:27,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:49:27,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969379737] [2020-07-21 01:49:27,655 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:27,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:49:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:49:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 01:49:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:49:27,811 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:49:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:49:27,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:49:27,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:49:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:49:28,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969379737] [2020-07-21 01:49:28,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:49:28,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 01:49:28,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815626815] [2020-07-21 01:49:28,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:49:28,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:49:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:49:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:49:28,078 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2020-07-21 01:49:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:49:28,380 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-21 01:49:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 01:49:28,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-07-21 01:49:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:49:28,382 INFO L225 Difference]: With dead ends: 27 [2020-07-21 01:49:28,382 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:49:28,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-07-21 01:49:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:49:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 01:49:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:49:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-07-21 01:49:28,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-07-21 01:49:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:49:28,390 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-07-21 01:49:28,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:49:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-07-21 01:49:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:49:28,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:49:28,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:49:28,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:28,593 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:49:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:49:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -798766796, now seen corresponding path program 1 times [2020-07-21 01:49:28,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:49:28,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562519119] [2020-07-21 01:49:28,595 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:28,626 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:49:28,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:49:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 01:49:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:49:28,750 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:49:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:49:28,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:49:28,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:49:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:49:28,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562519119] [2020-07-21 01:49:28,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:49:28,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-07-21 01:49:28,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821882651] [2020-07-21 01:49:28,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:49:28,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:49:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:49:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:49:29,000 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 17 states. [2020-07-21 01:49:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:49:29,632 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-07-21 01:49:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 01:49:29,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 01:49:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:49:29,633 INFO L225 Difference]: With dead ends: 28 [2020-07-21 01:49:29,633 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:49:29,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2020-07-21 01:49:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:49:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:49:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:49:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:49:29,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 01:49:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:49:29,636 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:49:29,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:49:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:49:29,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:49:29,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:49:29,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:49:30,076 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:49:30,076 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:49:30,077 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:49:30,077 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:49:30,077 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:49:30,077 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:49:30,078 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:49:30,078 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:49:30,078 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:49:30,079 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:49:30,079 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-07-21 01:49:30,079 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 01:49:30,079 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 29) no Hoare annotation was computed. [2020-07-21 01:49:30,080 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 01:49:30,080 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 01:49:30,080 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 24) no Hoare annotation was computed. [2020-07-21 01:49:30,080 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (and (< main_~i~0 (div (+ main_~a~0 main_~b~0 3) 3)) (or (= (+ main_~a~0 main_~b~0) (* main_~n~0 3)) (< main_~i~0 main_~n~0)) (< (div (+ main_~a~0 main_~b~0 2) 3) (+ main_~i~0 1))) [2020-07-21 01:49:30,080 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (= (+ main_~a~0 main_~b~0) (* main_~n~0 3)) [2020-07-21 01:49:30,081 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 29) no Hoare annotation was computed. [2020-07-21 01:49:30,081 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 01:49:30,081 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:49:30,081 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 01:49:30,081 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 01:49:30,081 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:49:30,083 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 01:49:30,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:49:30 BoogieIcfgContainer [2020-07-21 01:49:30,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:49:30,118 INFO L168 Benchmark]: Toolchain (without parser) took 4320.58 ms. Allocated memory was 144.2 MB in the beginning and 248.5 MB in the end (delta: 104.3 MB). Free memory was 102.3 MB in the beginning and 194.7 MB in the end (delta: -92.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,119 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.65 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,127 INFO L168 Benchmark]: Boogie Preprocessor took 129.76 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,128 INFO L168 Benchmark]: RCFGBuilder took 269.43 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 167.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,130 INFO L168 Benchmark]: TraceAbstraction took 3652.63 ms. Allocated memory was 201.3 MB in the beginning and 248.5 MB in the end (delta: 47.2 MB). Free memory was 167.1 MB in the beginning and 194.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:49:30,144 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.65 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.76 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.43 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 167.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3652.63 ms. Allocated memory was 201.3 MB in the beginning and 248.5 MB in the end (delta: 47.2 MB). Free memory was 167.1 MB in the beginning and 194.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 19.6 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: 17]: Loop Invariant Derived loop invariant: (i < (a + b + 3) / 3 && (a + b == n * 3 || i < n)) && (a + b + 2) / 3 < i + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 25 SDslu, 152 SDs, 0 SdLazy, 278 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 42 HoareAnnotationTreeSize, 12 FomulaSimplifications, 68 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 141 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 53 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 7127 SizeOfPredicates, 11 NumberOfNonLiveVariables, 156 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/12 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...