/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 23:08:26,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:08:26,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:08:26,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:08:26,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:08:26,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:08:26,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:08:26,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:08:26,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:08:26,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:08:26,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:08:26,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:08:26,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:08:26,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:08:26,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:08:26,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:08:26,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:08:26,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:08:26,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:08:26,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:08:26,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:08:26,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:08:26,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:08:26,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:08:26,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:08:26,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:08:26,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:08:26,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:08:26,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:08:26,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:08:26,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:08:26,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:08:26,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:08:26,311 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:08:26,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:08:26,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:08:26,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:08:26,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:08:26,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:08:26,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:08:26,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:08:26,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:08:26,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:08:26,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:08:26,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:08:26,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:08:26,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:08:26,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:08:26,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:08:26,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:08:26,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:26,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:08:26,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:08:26,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:08:26,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:08:26,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:26,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:08:26,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:08:26,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:08:26,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:08:26,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:08:26,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:08:26,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:08:26,651 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:08:26,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 23:08:26,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59165f6ed/9557c3152ae7455c9bb4577443076435/FLAGe8ee7cd50 [2020-07-21 23:08:27,191 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:08:27,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 23:08:27,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59165f6ed/9557c3152ae7455c9bb4577443076435/FLAGe8ee7cd50 [2020-07-21 23:08:27,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59165f6ed/9557c3152ae7455c9bb4577443076435 [2020-07-21 23:08:27,563 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:08:27,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:08:27,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:27,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:08:27,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:08:27,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e34a1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27, skipping insertion in model container [2020-07-21 23:08:27,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:08:27,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:08:27,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:27,799 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:08:27,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:27,840 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:08:27,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27 WrapperNode [2020-07-21 23:08:27,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:27,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:08:27,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:08:27,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:08:27,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... [2020-07-21 23:08:27,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:08:27,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:08:27,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:08:27,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:08:27,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:08:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:08:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 23:08:28,038 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 23:08:28,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:08:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:08:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:08:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 23:08:28,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:08:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 23:08:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:08:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:08:28,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:08:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:08:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:08:28,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:08:28,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:08:28,459 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:08:28,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:28 BoogieIcfgContainer [2020-07-21 23:08:28,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:08:28,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:08:28,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:08:28,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:08:28,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:27" (1/3) ... [2020-07-21 23:08:28,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365bbb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:28, skipping insertion in model container [2020-07-21 23:08:28,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:27" (2/3) ... [2020-07-21 23:08:28,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365bbb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:28, skipping insertion in model container [2020-07-21 23:08:28,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:28" (3/3) ... [2020-07-21 23:08:28,471 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-21 23:08:28,482 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:08:28,490 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:08:28,505 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:08:28,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:08:28,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:08:28,532 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:08:28,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:08:28,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:08:28,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:08:28,532 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:08:28,532 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:08:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 23:08:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 23:08:28,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,557 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 23:08:28,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-21 23:08:28,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:28,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746518314] [2020-07-21 23:08:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:28,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:08:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:08:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:28,749 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 23:08:28,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:28,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746518314] [2020-07-21 23:08:28,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:28,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:08:28,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115967268] [2020-07-21 23:08:28,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:08:28,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:08:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:28,778 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-21 23:08:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:28,832 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-07-21 23:08:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:08:28,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-21 23:08:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:28,845 INFO L225 Difference]: With dead ends: 66 [2020-07-21 23:08:28,845 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 23:08:28,849 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 23:08:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 23:08:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-21 23:08:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 23:08:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 23:08:28,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-21 23:08:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:28,899 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 23:08:28,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:08:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 23:08:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 23:08:28,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,903 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 23:08:29,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-21 23:08:29,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128924524] [2020-07-21 23:08:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,189 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,221 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 23:08:29,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:29,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128924524] [2020-07-21 23:08:29,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:29,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:08:29,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109230438] [2020-07-21 23:08:29,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:08:29,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:08:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:29,226 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-21 23:08:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:29,248 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-07-21 23:08:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:08:29,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 23:08:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:29,251 INFO L225 Difference]: With dead ends: 54 [2020-07-21 23:08:29,251 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 23:08:29,252 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 23:08:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 23:08:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-21 23:08:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 23:08:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-21 23:08:29,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-07-21 23:08:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:29,261 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-21 23:08:29,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:08:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-21 23:08:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 23:08:29,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:29,263 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 23:08:29,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,478 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2020-07-21 23:08:29,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747752284] [2020-07-21 23:08:29,481 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 23:08:29,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:08:29,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,581 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 23:08:29,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:29,665 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 23:08:29,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747752284] [2020-07-21 23:08:29,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:29,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:08:29,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004381229] [2020-07-21 23:08:29,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:08:29,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:08:29,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:08:29,668 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2020-07-21 23:08:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:29,715 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-07-21 23:08:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:08:29,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-21 23:08:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:29,717 INFO L225 Difference]: With dead ends: 65 [2020-07-21 23:08:29,717 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 23:08:29,718 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 23:08:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 23:08:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 23:08:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 23:08:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 23:08:29,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 48 [2020-07-21 23:08:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:29,726 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 23:08:29,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:08:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 23:08:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 23:08:29,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:29,728 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 23:08:29,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -927018228, now seen corresponding path program 2 times [2020-07-21 23:08:29,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235228079] [2020-07-21 23:08:29,935 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 23:08:30,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:30,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:30,021 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 23:08:30,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:30,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235228079] [2020-07-21 23:08:30,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:30,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:08:30,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033754759] [2020-07-21 23:08:30,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:08:30,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:08:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:30,024 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 3 states. [2020-07-21 23:08:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,052 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-07-21 23:08:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:08:30,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-07-21 23:08:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:30,055 INFO L225 Difference]: With dead ends: 67 [2020-07-21 23:08:30,056 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 23:08:30,056 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 23:08:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 23:08:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-07-21 23:08:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 23:08:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-21 23:08:30,076 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 54 [2020-07-21 23:08:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:30,077 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-21 23:08:30,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:08:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-21 23:08:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 23:08:30,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:30,081 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 23:08:30,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:30,296 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2144769321, now seen corresponding path program 1 times [2020-07-21 23:08:30,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:30,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232269950] [2020-07-21 23:08:30,297 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 23:08:30,361 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:08:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:30,439 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 23:08:30,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:30,517 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 23:08:30,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232269950] [2020-07-21 23:08:30,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:30,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 23:08:30,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790257450] [2020-07-21 23:08:30,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:08:30,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:08:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:08:30,520 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 7 states. [2020-07-21 23:08:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,553 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-07-21 23:08:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:08:30,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-21 23:08:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:30,555 INFO L225 Difference]: With dead ends: 75 [2020-07-21 23:08:30,556 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 23:08:30,556 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 23:08:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 23:08:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-21 23:08:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 23:08:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-21 23:08:30,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 54 [2020-07-21 23:08:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:30,565 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-21 23:08:30,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:08:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-21 23:08:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 23:08:30,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:30,567 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 23:08:30,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:30,781 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1165991573, now seen corresponding path program 2 times [2020-07-21 23:08:30,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:30,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264618500] [2020-07-21 23:08:30,782 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 23:08:30,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:30,879 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 23:08:30,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:30,931 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 23:08:30,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264618500] [2020-07-21 23:08:30,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:30,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:08:30,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402684492] [2020-07-21 23:08:30,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:08:30,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:08:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:08:30,943 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-07-21 23:08:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,999 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-07-21 23:08:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:08:31,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-07-21 23:08:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,001 INFO L225 Difference]: With dead ends: 78 [2020-07-21 23:08:31,001 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 23:08:31,002 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 23:08:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 23:08:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-21 23:08:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 23:08:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-07-21 23:08:31,011 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 56 [2020-07-21 23:08:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,011 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-07-21 23:08:31,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:08:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-07-21 23:08:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 23:08:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,014 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 23:08:31,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:31,227 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1472347954, now seen corresponding path program 1 times [2020-07-21 23:08:31,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:31,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082529124] [2020-07-21 23:08:31,228 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 23:08:31,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:08:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:31,345 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 23:08:31,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:31,412 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 23:08:31,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082529124] [2020-07-21 23:08:31,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:31,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-21 23:08:31,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871216890] [2020-07-21 23:08:31,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:08:31,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:08:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:08:31,416 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 5 states. [2020-07-21 23:08:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:31,454 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-07-21 23:08:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:08:31,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-07-21 23:08:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,458 INFO L225 Difference]: With dead ends: 79 [2020-07-21 23:08:31,458 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 23:08:31,461 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 23:08:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 23:08:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 23:08:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 23:08:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-07-21 23:08:31,472 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 83 [2020-07-21 23:08:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,473 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-07-21 23:08:31,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:08:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-07-21 23:08:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 23:08:31,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,475 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 23:08:31,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:31,689 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash 251770956, now seen corresponding path program 2 times [2020-07-21 23:08:31,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266022378] [2020-07-21 23:08:31,690 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 23:08:31,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:31,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:31,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:08:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:31,796 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 23:08:31,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:31,853 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 23:08:31,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266022378] [2020-07-21 23:08:31,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:31,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 23:08:31,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168437110] [2020-07-21 23:08:31,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:08:31,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:08:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:08:31,855 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-07-21 23:08:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:31,888 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-07-21 23:08:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:08:31,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-07-21 23:08:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:31,890 INFO L225 Difference]: With dead ends: 82 [2020-07-21 23:08:31,890 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 23:08:31,891 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 23:08:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 23:08:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 23:08:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 23:08:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-07-21 23:08:31,897 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 83 [2020-07-21 23:08:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:31,897 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-07-21 23:08:31,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:08:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-07-21 23:08:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 23:08:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:31,899 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 23:08:32,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:32,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:32,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:32,107 INFO L82 PathProgramCache]: Analyzing trace with hash 516945678, now seen corresponding path program 3 times [2020-07-21 23:08:32,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:32,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671062003] [2020-07-21 23:08:32,108 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 23:08:32,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:08:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:32,219 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 23:08:32,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:32,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671062003] [2020-07-21 23:08:32,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:32,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:08:32,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088659870] [2020-07-21 23:08:32,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:08:32,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:08:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:08:32,222 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 3 states. [2020-07-21 23:08:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:32,232 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-07-21 23:08:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:08:32,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-07-21 23:08:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:32,234 INFO L225 Difference]: With dead ends: 82 [2020-07-21 23:08:32,234 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 23:08:32,235 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 23:08:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 23:08:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-21 23:08:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 23:08:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-21 23:08:32,241 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 92 [2020-07-21 23:08:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:32,242 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-21 23:08:32,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:08:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-21 23:08:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 23:08:32,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:32,244 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 23:08:32,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:32,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 1 times [2020-07-21 23:08:32,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:32,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558464589] [2020-07-21 23:08:32,459 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 23:08:32,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:32,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:32,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:32,588 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 23:08:32,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:32,680 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 23:08:32,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558464589] [2020-07-21 23:08:32,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:32,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:08:32,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285689959] [2020-07-21 23:08:32,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:08:32,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:08:32,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:08:32,682 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-21 23:08:32,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:32,717 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-21 23:08:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:08:32,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-21 23:08:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:32,719 INFO L225 Difference]: With dead ends: 87 [2020-07-21 23:08:32,719 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 23:08:32,720 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 23:08:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 23:08:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 23:08:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 23:08:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 23:08:32,735 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-21 23:08:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:32,738 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 23:08:32,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:08:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 23:08:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 23:08:32,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:32,740 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 23:08:32,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:32,948 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 2 times [2020-07-21 23:08:32,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:32,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996026069] [2020-07-21 23:08:32,951 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 23:08:33,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:08:33,331 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:08:33,432 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:33,488 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:08:33,488 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:08:33,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:33,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:08:33 BoogieIcfgContainer [2020-07-21 23:08:33,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:08:33,781 INFO L168 Benchmark]: Toolchain (without parser) took 6214.84 ms. Allocated memory was 138.9 MB in the beginning and 246.4 MB in the end (delta: 107.5 MB). Free memory was 103.3 MB in the beginning and 150.5 MB in the end (delta: -47.2 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,782 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.14 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,783 INFO L168 Benchmark]: Boogie Preprocessor took 132.65 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,784 INFO L168 Benchmark]: RCFGBuilder took 485.66 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.6 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,785 INFO L168 Benchmark]: TraceAbstraction took 5313.76 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 162.6 MB in the beginning and 150.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:33,789 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 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.14 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.65 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.66 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 162.6 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5313.76 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 162.6 MB in the beginning and 150.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 55.2 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=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, 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=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=0, 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=0, temp=-1, 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=-1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-1, 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=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=0, ret=0, temp=-1, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=0, ret2=0, temp=1, 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=0, ret2=0, temp=1, 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=0, ret2=0, temp=1, 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=0, ret2=0, temp=1, 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=0, ret2=0, temp=1, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=0, ret2=0, temp=1, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=0, ret2=0, temp=1, 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=2, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2, 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}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=1, ret=0, ret2=0, temp=1, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=0, ret2=0, ret5=1, temp=1, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=0, ret2=0, ret5=1, temp=1, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 11, TraceHistogramMax: 15, AutomataDifference: 0.4s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1048 GetRequests, 1007 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s 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, 0.7s 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...