/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:00,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:00,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:00,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:00,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:00,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:00,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:00,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:00,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:00,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:00,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:00,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:00,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:00,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:00,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:00,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:00,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:00,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:00,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:00,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:00,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:00,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:00,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:00,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:00,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:00,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:00,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:00,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:00,467 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 20:18:00,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:00,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:00,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:00,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:00,499 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:00,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:00,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:00,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:00,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:00,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:00,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:00,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:00,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:00,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:00,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:00,506 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:00,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:00,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:00,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:00,507 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:00,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:00,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:00,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:00,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:00,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:00,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:00,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:00,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:00,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:00,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:18:00,832 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:00,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:00,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:00,852 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:00,852 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:00,853 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 20:18:00,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80daabf20/68520b34ef6e4c84be23da00500bdbf7/FLAG09d3de9e4 [2020-07-21 20:18:01,414 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:01,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 20:18:01,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80daabf20/68520b34ef6e4c84be23da00500bdbf7/FLAG09d3de9e4 [2020-07-21 20:18:01,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80daabf20/68520b34ef6e4c84be23da00500bdbf7 [2020-07-21 20:18:01,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:01,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:01,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:01,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:01,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:01,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:01" (1/1) ... [2020-07-21 20:18:01,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a9f060f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:01, skipping insertion in model container [2020-07-21 20:18:01,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:01" (1/1) ... [2020-07-21 20:18:01,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:01,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:02,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:02,047 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:02,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:02,099 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:02,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02 WrapperNode [2020-07-21 20:18:02,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:02,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:02,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:02,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:02,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:02,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:02,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:02,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:02,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (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 20:18:02,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 20:18:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 20:18:02,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:02,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:02,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:02,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:02,698 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:02,699 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:18:02,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:02 BoogieIcfgContainer [2020-07-21 20:18:02,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:02,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:02,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:02,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:02,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:01" (1/3) ... [2020-07-21 20:18:02,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3958b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:02, skipping insertion in model container [2020-07-21 20:18:02,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (2/3) ... [2020-07-21 20:18:02,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3958b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:02, skipping insertion in model container [2020-07-21 20:18:02,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:02" (3/3) ... [2020-07-21 20:18:02,719 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-21 20:18:02,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:02,738 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:02,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:02,774 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:02,774 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:02,774 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:02,774 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:02,774 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:02,774 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:02,775 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:02,775 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-21 20:18:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 20:18:02,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:02,800 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] [2020-07-21 20:18:02,801 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-21 20:18:02,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:02,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063784068] [2020-07-21 20:18:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:02,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 20:18:03,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:03,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063784068] [2020-07-21 20:18:03,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:03,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:03,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802748402] [2020-07-21 20:18:03,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:03,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:03,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:03,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:03,036 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-21 20:18:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:03,089 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-21 20:18:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:03,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-21 20:18:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:03,103 INFO L225 Difference]: With dead ends: 73 [2020-07-21 20:18:03,103 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:18:03,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 20:18:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:18:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-21 20:18:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 20:18:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-21 20:18:03,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-21 20:18:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:03,157 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-21 20:18:03,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-21 20:18:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 20:18:03,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:03,160 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] [2020-07-21 20:18:03,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:03,374 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-21 20:18:03,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:03,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721221289] [2020-07-21 20:18:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:03,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 20:18:03,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:03,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721221289] [2020-07-21 20:18:03,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:03,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:03,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337010215] [2020-07-21 20:18:03,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:03,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:03,558 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-21 20:18:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:03,662 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-21 20:18:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:03,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-21 20:18:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:03,665 INFO L225 Difference]: With dead ends: 56 [2020-07-21 20:18:03,665 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:18:03,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:18:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 20:18:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 20:18:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 20:18:03,676 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-21 20:18:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:03,677 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 20:18:03,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 20:18:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 20:18:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:03,680 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, 1] [2020-07-21 20:18:03,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:03,895 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:03,896 INFO L82 PathProgramCache]: Analyzing trace with hash -759897477, now seen corresponding path program 1 times [2020-07-21 20:18:03,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:03,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410453418] [2020-07-21 20:18:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:03,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 20:18:04,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410453418] [2020-07-21 20:18:04,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:04,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591736474] [2020-07-21 20:18:04,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:04,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:04,030 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-07-21 20:18:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,119 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-21 20:18:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:04,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-21 20:18:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,121 INFO L225 Difference]: With dead ends: 67 [2020-07-21 20:18:04,121 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 20:18:04,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 20:18:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-21 20:18:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 20:18:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-21 20:18:04,131 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-07-21 20:18:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,131 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-21 20:18:04,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-21 20:18:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 20:18:04,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,133 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, 1, 1, 1] [2020-07-21 20:18:04,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:04,347 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1437163047, now seen corresponding path program 1 times [2020-07-21 20:18:04,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12360369] [2020-07-21 20:18:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:04,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 20:18:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 20:18:04,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12360369] [2020-07-21 20:18:04,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:04,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 20:18:04,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406717614] [2020-07-21 20:18:04,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:18:04,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:18:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:18:04,638 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-07-21 20:18:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,792 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-21 20:18:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:04,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-07-21 20:18:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,795 INFO L225 Difference]: With dead ends: 69 [2020-07-21 20:18:04,795 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 20:18:04,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 20:18:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 20:18:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:18:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 20:18:04,815 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2020-07-21 20:18:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,816 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 20:18:04,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:18:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 20:18:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 20:18:04,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2020-07-21 20:18:05,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,037 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash 545653175, now seen corresponding path program 2 times [2020-07-21 20:18:05,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20745819] [2020-07-21 20:18:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:05,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 20:18:05,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:05,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20745819] [2020-07-21 20:18:05,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:05,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:05,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586045471] [2020-07-21 20:18:05,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:05,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:05,169 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-21 20:18:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,238 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-21 20:18:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:05,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-07-21 20:18:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,240 INFO L225 Difference]: With dead ends: 67 [2020-07-21 20:18:05,240 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 20:18:05,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 20:18:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-21 20:18:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 20:18:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-21 20:18:05,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 44 [2020-07-21 20:18:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,250 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-21 20:18:05,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-21 20:18:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 20:18:05,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1] [2020-07-21 20:18:05,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,463 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2870664, now seen corresponding path program 1 times [2020-07-21 20:18:05,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184509672] [2020-07-21 20:18:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:05,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 20:18:05,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 20:18:05,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184509672] [2020-07-21 20:18:05,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:05,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 20:18:05,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081514898] [2020-07-21 20:18:05,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:18:05,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:18:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:18:05,766 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 8 states. [2020-07-21 20:18:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,927 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-07-21 20:18:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:05,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-07-21 20:18:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,929 INFO L225 Difference]: With dead ends: 72 [2020-07-21 20:18:05,930 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 20:18:05,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 20:18:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-21 20:18:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 20:18:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 20:18:05,940 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 53 [2020-07-21 20:18:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,940 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 20:18:05,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:18:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 20:18:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 20:18:05,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,942 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 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, 1] [2020-07-21 20:18:06,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,158 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 2 times [2020-07-21 20:18:06,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332963605] [2020-07-21 20:18:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:06,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-21 20:18:06,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:06,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332963605] [2020-07-21 20:18:06,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:06,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 20:18:06,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529383155] [2020-07-21 20:18:06,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:18:06,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:18:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:06,334 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-21 20:18:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:06,661 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-21 20:18:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:18:06,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-21 20:18:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:06,667 INFO L225 Difference]: With dead ends: 74 [2020-07-21 20:18:06,667 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 20:18:06,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 20:18:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-21 20:18:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 20:18:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-21 20:18:06,679 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-21 20:18:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:06,680 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-21 20:18:06,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:18:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-21 20:18:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 20:18:06,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:06,682 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1] [2020-07-21 20:18:06,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,896 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-21 20:18:06,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258463339] [2020-07-21 20:18:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:06,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-21 20:18:07,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 20:18:07,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258463339] [2020-07-21 20:18:07,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:07,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 20:18:07,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905589498] [2020-07-21 20:18:07,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:18:07,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:07,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:18:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:18:07,178 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 12 states. [2020-07-21 20:18:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:07,449 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-07-21 20:18:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 20:18:07,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-07-21 20:18:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:07,452 INFO L225 Difference]: With dead ends: 123 [2020-07-21 20:18:07,452 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 20:18:07,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-07-21 20:18:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 20:18:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-07-21 20:18:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 20:18:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2020-07-21 20:18:07,466 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 65 [2020-07-21 20:18:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:07,467 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2020-07-21 20:18:07,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:18:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2020-07-21 20:18:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 20:18:07,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:07,469 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1] [2020-07-21 20:18:07,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:07,684 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1058231685, now seen corresponding path program 2 times [2020-07-21 20:18:07,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:07,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410398195] [2020-07-21 20:18:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:07,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:07,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:18:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-21 20:18:07,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-07-21 20:18:07,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410398195] [2020-07-21 20:18:07,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:07,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 20:18:07,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389307630] [2020-07-21 20:18:07,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 20:18:07,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 20:18:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:18:07,958 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 10 states. [2020-07-21 20:18:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:08,116 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2020-07-21 20:18:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:18:08,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-07-21 20:18:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:08,118 INFO L225 Difference]: With dead ends: 180 [2020-07-21 20:18:08,119 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 20:18:08,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:18:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 20:18:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-21 20:18:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 20:18:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-07-21 20:18:08,132 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 67 [2020-07-21 20:18:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:08,133 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-07-21 20:18:08,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 20:18:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-07-21 20:18:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 20:18:08,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:08,134 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1] [2020-07-21 20:18:08,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:08,349 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1913896867, now seen corresponding path program 3 times [2020-07-21 20:18:08,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:08,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683949367] [2020-07-21 20:18:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:08,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:18:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 20:18:08,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-07-21 20:18:08,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683949367] [2020-07-21 20:18:08,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:08,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 20:18:08,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701359404] [2020-07-21 20:18:08,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 20:18:08,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 20:18:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 20:18:08,689 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 13 states. [2020-07-21 20:18:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:08,911 INFO L93 Difference]: Finished difference Result 139 states and 183 transitions. [2020-07-21 20:18:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 20:18:08,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-21 20:18:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:08,913 INFO L225 Difference]: With dead ends: 139 [2020-07-21 20:18:08,913 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 20:18:08,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-21 20:18:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 20:18:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-07-21 20:18:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 20:18:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-21 20:18:08,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 69 [2020-07-21 20:18:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:08,934 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-21 20:18:08,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 20:18:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-21 20:18:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-21 20:18:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:08,936 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 20:18:09,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:09,141 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 1 times [2020-07-21 20:18:09,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:09,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159185060] [2020-07-21 20:18:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:09,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:09,278 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:09,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:09,438 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:09,438 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:09,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:09,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:09 BoogieIcfgContainer [2020-07-21 20:18:09,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:09,734 INFO L168 Benchmark]: Toolchain (without parser) took 7940.65 ms. Allocated memory was 145.8 MB in the beginning and 276.3 MB in the end (delta: 130.5 MB). Free memory was 102.4 MB in the beginning and 167.5 MB in the end (delta: -65.1 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,735 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.34 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,737 INFO L168 Benchmark]: Boogie Preprocessor took 133.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 179.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,737 INFO L168 Benchmark]: RCFGBuilder took 471.79 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 161.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,738 INFO L168 Benchmark]: TraceAbstraction took 7021.32 ms. Allocated memory was 202.4 MB in the beginning and 276.3 MB in the end (delta: 73.9 MB). Free memory was 160.9 MB in the beginning and 167.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:09,742 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.34 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.6 MB in the beginning and 179.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 471.79 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 161.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7021.32 ms. Allocated memory was 202.4 MB in the beginning and 276.3 MB in the end (delta: 73.9 MB). Free memory was 160.9 MB in the beginning and 167.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=2, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=2, temp=1, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2, cnt=1, i=3, N=3, ret=2, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=2, ret=2, temp=1, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=2, ret2=2, temp=3, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=3, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=3, cnt=1, i=3, N=3, ret=3, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=3, ret=2, ret2=2, temp=3, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=2, ret2=2, ret5=3, temp=3, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=2, ret2=2, ret5=3, temp=3, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.8s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 281 SDslu, 753 SDs, 0 SdLazy, 726 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 815 GetRequests, 729 SyntacticMatches, 21 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=9, 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, 41 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 593 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 85717 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1775 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 806/905 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...