/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/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:37:53,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:37:53,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:37:53,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:37:53,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:37:53,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:37:53,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:37:53,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:37:53,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:37:53,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:37:53,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:37:53,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:37:53,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:37:53,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:37:53,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:37:53,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:37:53,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:37:53,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:37:53,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:37:53,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:37:53,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:37:53,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:37:53,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:37:53,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:37:53,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:37:53,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:37:53,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:37:53,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:37:53,363 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 01:37:53,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:37:53,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:37:53,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:37:53,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:37:53,391 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:37:53,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:37:53,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:37:53,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:37:53,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:37:53,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:37:53,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:37:53,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:37:53,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:37:53,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:37:53,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:37:53,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:37:53,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:37:53,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:37:53,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:37:53,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:37:53,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:37:53,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:37:53,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:37:53,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:37:53,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:37:53,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:37:53,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:53,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:37:53,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:37:53,397 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 01:37:53,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:37:53,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:37:53,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:37:53,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:37:53,824 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:37:53,824 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 01:37:53,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bc254587/ec424cdbdde643ddab414f5ae3b114fc/FLAGa0f15f3e0 [2020-07-21 01:37:54,484 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:37:54,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 01:37:54,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bc254587/ec424cdbdde643ddab414f5ae3b114fc/FLAGa0f15f3e0 [2020-07-21 01:37:54,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bc254587/ec424cdbdde643ddab414f5ae3b114fc [2020-07-21 01:37:54,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:37:54,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:37:54,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:37:54,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:37:54,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:37:54,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:37:54" (1/1) ... [2020-07-21 01:37:54,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0926b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:54, skipping insertion in model container [2020-07-21 01:37:54,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:37:54" (1/1) ... [2020-07-21 01:37:54,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:37:54,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:37:55,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:37:55,136 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:37:55,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:37:55,180 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:37:55,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55 WrapperNode [2020-07-21 01:37:55,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:37:55,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:37:55,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:37:55,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:37:55,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (1/1) ... [2020-07-21 01:37:55,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:37:55,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:37:55,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:37:55,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:37:55,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (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 01:37:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:37:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:37:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 01:37:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 01:37:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:37:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:37:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:37:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:37:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:37:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:37:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:37:55,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:37:55,813 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:37:55,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:37:55 BoogieIcfgContainer [2020-07-21 01:37:55,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:37:55,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:37:55,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:37:55,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:37:55,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:37:54" (1/3) ... [2020-07-21 01:37:55,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fafbd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:37:55, skipping insertion in model container [2020-07-21 01:37:55,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:37:55" (2/3) ... [2020-07-21 01:37:55,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fafbd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:37:55, skipping insertion in model container [2020-07-21 01:37:55,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:37:55" (3/3) ... [2020-07-21 01:37:55,827 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-21 01:37:55,838 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:37:55,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:37:55,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:37:55,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:37:55,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:37:55,885 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:37:55,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:37:55,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:37:55,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:37:55,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:37:55,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:37:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 01:37:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 01:37:55,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:55,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:55,917 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-21 01:37:55,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:55,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102087770] [2020-07-21 01:37:55,932 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 01:37:56,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 01:37:56,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:56,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:37:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 01:37:56,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:37:56,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102087770] [2020-07-21 01:37:56,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:37:56,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:37:56,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552719098] [2020-07-21 01:37:56,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:37:56,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:37:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:56,138 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-21 01:37:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:56,194 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-07-21 01:37:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:37:56,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-21 01:37:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:56,207 INFO L225 Difference]: With dead ends: 66 [2020-07-21 01:37:56,208 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 01:37:56,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 01:37:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-21 01:37:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:37:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 01:37:56,263 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-21 01:37:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:56,264 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 01:37:56,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:37:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 01:37:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 01:37:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:56,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:56,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:56,479 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-21 01:37:56,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:56,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991185208] [2020-07-21 01:37:56,482 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 01:37:56,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:56,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:37:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 01:37:56,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:37:56,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991185208] [2020-07-21 01:37:56,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:37:56,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:37:56,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328181215] [2020-07-21 01:37:56,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:37:56,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:37:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:56,621 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-21 01:37:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:56,644 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-07-21 01:37:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:37:56,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 01:37:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:56,647 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:37:56,647 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 01:37:56,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 01:37:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-21 01:37:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 01:37:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-21 01:37:56,657 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-07-21 01:37:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:56,657 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-21 01:37:56,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:37:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-21 01:37:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 01:37:56,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:56,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:56,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:56,873 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2020-07-21 01:37:56,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:56,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482889002] [2020-07-21 01:37:56,876 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 01:37:56,939 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 01:37:56,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:37:56,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-21 01:37:56,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-21 01:37:57,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482889002] [2020-07-21 01:37:57,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:57,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:37:57,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055947908] [2020-07-21 01:37:57,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:37:57,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:57,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:37:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:37:57,068 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2020-07-21 01:37:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:57,114 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-07-21 01:37:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:37:57,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-21 01:37:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:57,118 INFO L225 Difference]: With dead ends: 65 [2020-07-21 01:37:57,118 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 01:37:57,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:37:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 01:37:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 01:37:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:37:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 01:37:57,127 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 48 [2020-07-21 01:37:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:57,128 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 01:37:57,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:37:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 01:37:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 01:37:57,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:57,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:57,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:57,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash -927018228, now seen corresponding path program 2 times [2020-07-21 01:37:57,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:57,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116816590] [2020-07-21 01:37:57,343 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 01:37:57,420 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:57,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:37:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-21 01:37:57,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:37:57,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116816590] [2020-07-21 01:37:57,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:37:57,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:37:57,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36768773] [2020-07-21 01:37:57,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:37:57,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:57,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:37:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:57,460 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 3 states. [2020-07-21 01:37:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:57,597 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-07-21 01:37:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:37:57,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-07-21 01:37:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:57,602 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:37:57,603 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 01:37:57,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 01:37:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-07-21 01:37:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 01:37:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-21 01:37:57,625 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 54 [2020-07-21 01:37:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:57,626 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-21 01:37:57,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:37:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-21 01:37:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 01:37:57,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:57,630 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:57,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:57,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2144769321, now seen corresponding path program 1 times [2020-07-21 01:37:57,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:57,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989734373] [2020-07-21 01:37:57,834 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:57,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:57,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:37:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-21 01:37:57,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-21 01:37:58,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989734373] [2020-07-21 01:37:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 01:37:58,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624400912] [2020-07-21 01:37:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:37:58,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:37:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:37:58,052 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 7 states. [2020-07-21 01:37:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:58,087 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-07-21 01:37:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:37:58,087 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-21 01:37:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:58,089 INFO L225 Difference]: With dead ends: 75 [2020-07-21 01:37:58,089 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 01:37:58,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:37:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 01:37:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-21 01:37:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 01:37:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-21 01:37:58,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 54 [2020-07-21 01:37:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:58,098 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-21 01:37:58,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:37:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-21 01:37:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 01:37:58,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:58,099 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:58,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:58,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1165991573, now seen corresponding path program 2 times [2020-07-21 01:37:58,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:58,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813627946] [2020-07-21 01:37:58,318 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:58,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:37:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-21 01:37:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 01:37:58,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813627946] [2020-07-21 01:37:58,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:58,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:37:58,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179781343] [2020-07-21 01:37:58,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:37:58,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:37:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:37:58,450 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-07-21 01:37:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:58,496 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-07-21 01:37:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:37:58,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-07-21 01:37:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:58,499 INFO L225 Difference]: With dead ends: 78 [2020-07-21 01:37:58,499 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 01:37:58,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:37:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 01:37:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-21 01:37:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 01:37:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-07-21 01:37:58,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 56 [2020-07-21 01:37:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:58,510 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-07-21 01:37:58,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:37:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-07-21 01:37:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 01:37:58,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:58,512 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:58,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:58,728 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1472347954, now seen corresponding path program 1 times [2020-07-21 01:37:58,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:58,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448364654] [2020-07-21 01:37:58,730 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:58,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:58,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:37:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-07-21 01:37:58,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-07-21 01:37:58,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448364654] [2020-07-21 01:37:58,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:58,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-21 01:37:58,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962687046] [2020-07-21 01:37:58,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:37:58,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:58,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:37:58,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:37:58,958 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 5 states. [2020-07-21 01:37:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:58,993 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-07-21 01:37:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:37:58,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-07-21 01:37:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:58,998 INFO L225 Difference]: With dead ends: 79 [2020-07-21 01:37:58,999 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 01:37:59,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:37:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 01:37:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 01:37:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 01:37:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-07-21 01:37:59,012 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 83 [2020-07-21 01:37:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:59,013 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-07-21 01:37:59,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:37:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-07-21 01:37:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 01:37:59,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:59,019 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:59,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:59,233 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 251770956, now seen corresponding path program 2 times [2020-07-21 01:37:59,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:59,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378103767] [2020-07-21 01:37:59,235 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:59,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:37:59,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:37:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 01:37:59,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:37:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 01:37:59,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378103767] [2020-07-21 01:37:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:37:59,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 01:37:59,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851603494] [2020-07-21 01:37:59,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:37:59,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:37:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:37:59,452 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-07-21 01:37:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:59,494 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-07-21 01:37:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:37:59,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-07-21 01:37:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:59,496 INFO L225 Difference]: With dead ends: 82 [2020-07-21 01:37:59,496 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 01:37:59,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:37:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 01:37:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 01:37:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 01:37:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-07-21 01:37:59,504 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 83 [2020-07-21 01:37:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:59,505 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-07-21 01:37:59,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:37:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-07-21 01:37:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 01:37:59,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:59,507 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:37:59,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:59,722 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:37:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:37:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 516945678, now seen corresponding path program 3 times [2020-07-21 01:37:59,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:37:59,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054817552] [2020-07-21 01:37:59,724 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:37:59,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:37:59,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:37:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:37:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:37:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 01:37:59,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:37:59,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054817552] [2020-07-21 01:37:59,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:37:59,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:37:59,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950417495] [2020-07-21 01:37:59,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:37:59,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:37:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:37:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:59,869 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 3 states. [2020-07-21 01:37:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:37:59,886 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-07-21 01:37:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:37:59,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-07-21 01:37:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:37:59,891 INFO L225 Difference]: With dead ends: 82 [2020-07-21 01:37:59,891 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 01:37:59,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:37:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 01:37:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-21 01:37:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 01:37:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-21 01:37:59,906 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 92 [2020-07-21 01:37:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:37:59,907 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-21 01:37:59,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:37:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-21 01:37:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 01:37:59,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:37:59,909 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:00,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:00,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 1 times [2020-07-21 01:38:00,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:00,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279425584] [2020-07-21 01:38:00,127 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:00,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 01:38:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-07-21 01:38:00,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279425584] [2020-07-21 01:38:00,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:38:00,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:38:00,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487629254] [2020-07-21 01:38:00,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:38:00,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:38:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:38:00,315 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-21 01:38:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:00,340 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-21 01:38:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:38:00,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-21 01:38:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:00,342 INFO L225 Difference]: With dead ends: 87 [2020-07-21 01:38:00,342 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 01:38:00,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:38:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 01:38:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 01:38:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 01:38:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 01:38:00,350 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-21 01:38:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:00,350 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 01:38:00,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:38:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 01:38:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 01:38:00,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:00,352 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:00,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:00,568 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 2 times [2020-07-21 01:38:00,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:00,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947342708] [2020-07-21 01:38:00,570 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:00,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:00,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:00,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:01,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:01,087 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:01,088 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:01,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:01,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:01 BoogieIcfgContainer [2020-07-21 01:38:01,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:01,392 INFO L168 Benchmark]: Toolchain (without parser) took 6557.86 ms. Allocated memory was 140.5 MB in the beginning and 243.8 MB in the end (delta: 103.3 MB). Free memory was 104.7 MB in the beginning and 133.8 MB in the end (delta: -29.1 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,393 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.41 ms. Allocated memory is still 140.5 MB. Free memory was 104.3 MB in the beginning and 93.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,394 INFO L168 Benchmark]: Boogie Preprocessor took 138.47 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 93.9 MB in the beginning and 179.0 MB in the end (delta: -85.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,395 INFO L168 Benchmark]: RCFGBuilder took 497.55 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,396 INFO L168 Benchmark]: TraceAbstraction took 5569.98 ms. Allocated memory was 201.3 MB in the beginning and 243.8 MB in the end (delta: 42.5 MB). Free memory was 160.4 MB in the beginning and 133.8 MB in the end (delta: 26.6 MB). Peak memory consumption was 69.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:01,400 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.41 ms. Allocated memory is still 140.5 MB. Free memory was 104.3 MB in the beginning and 93.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.47 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 93.9 MB in the beginning and 179.0 MB in the end (delta: -85.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 497.55 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5569.98 ms. Allocated memory was 201.3 MB in the beginning and 243.8 MB in the end (delta: 42.5 MB). Free memory was 160.4 MB in the beginning and 133.8 MB in the end (delta: 26.6 MB). Peak memory consumption was 69.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; VAL [x={2:0}] [L32] CALL init_nondet(x) VAL [x={2:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={2:0}, x={2:0}] [L6] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L32] RET init_nondet(x) VAL [x={2:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={2:0}] [L38] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483643, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483643, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483643, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=3, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=1, cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=1, x={2:0}] [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp VAL [ret=1, temp=2147483647, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483643, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483643, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483643, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=3, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=1, cnt=2, i=5, ret=3, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=1, ret=1, temp=2147483647, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=1, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=2, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=3, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=4, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L47] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483646, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2147483646, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483646, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=7, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=3, cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=3, ret=1, ret2=1, temp=-2147483639, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=1, ret2=1, ret5=3, temp=-2147483639, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=1, ret2=1, ret5=3, temp=-2147483639, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 11, TraceHistogramMax: 15, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 359 SDtfs, 50 SDslu, 469 SDs, 0 SdLazy, 107 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1048 GetRequests, 1007 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 740 NumberOfCodeBlocks, 451 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1042 ConstructedInterpolants, 0 QuantifiedInterpolants, 86326 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1201 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2306/2660 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 incorrect! Received shutdown request...