/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 NUM_VARIABLES --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 16:40:50,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:40:50,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:40:50,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:40:50,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:40:50,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:40:50,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:40:50,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:40:50,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:40:50,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:40:50,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:40:50,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:40:50,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:40:50,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:40:50,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:40:50,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:40:50,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:40:50,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:40:50,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:40:50,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:40:50,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:40:50,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:40:50,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:40:50,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:40:50,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:40:50,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:40:50,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:40:50,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:40:50,508 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 16:40:50,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:40:50,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:40:50,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:40:50,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:40:50,524 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:40:50,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:40:50,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:40:50,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:40:50,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:40:50,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:40:50,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:40:50,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:40:50,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:40:50,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:40:50,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:40:50,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:40:50,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:40:50,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:40:50,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:40:50,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:40:50,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:40:50,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:40:50,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:40:50,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:40:50,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:40:50,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:40:50,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:50,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:40:50,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:40:50,529 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 -> NUM_VARIABLES 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 16:40:50,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:40:50,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:40:50,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:40:50,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:40:50,832 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:40:50,833 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 16:40:50,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc765b6/6e927eedd4a94346bee3ee626c2a4b44/FLAG1b1d7e1d6 [2020-07-21 16:40:51,434 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:40:51,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 16:40:51,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc765b6/6e927eedd4a94346bee3ee626c2a4b44/FLAG1b1d7e1d6 [2020-07-21 16:40:51,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86bc765b6/6e927eedd4a94346bee3ee626c2a4b44 [2020-07-21 16:40:51,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:40:51,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:40:51,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:40:51,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:40:51,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:40:51,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:40:51" (1/1) ... [2020-07-21 16:40:51,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1903fa75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:51, skipping insertion in model container [2020-07-21 16:40:51,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:40:51" (1/1) ... [2020-07-21 16:40:51,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:40:51,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:40:52,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:40:52,175 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:40:52,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:40:52,376 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:40:52,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52 WrapperNode [2020-07-21 16:40:52,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:40:52,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:40:52,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:40:52,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:40:52,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (1/1) ... [2020-07-21 16:40:52,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:40:52,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:40:52,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:40:52,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:40:52,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (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 16:40:52,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:40:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:40:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 16:40:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 16:40:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:40:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:40:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:40:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 16:40:52,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:40:52,528 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 16:40:52,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:40:52,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:40:52,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:40:52,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:40:52,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:40:52,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:40:52,876 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:40:52,876 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:40:52,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:40:52 BoogieIcfgContainer [2020-07-21 16:40:52,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:40:52,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:40:52,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:40:52,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:40:52,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:40:51" (1/3) ... [2020-07-21 16:40:52,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0905df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:40:52, skipping insertion in model container [2020-07-21 16:40:52,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:40:52" (2/3) ... [2020-07-21 16:40:52,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0905df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:40:52, skipping insertion in model container [2020-07-21 16:40:52,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:40:52" (3/3) ... [2020-07-21 16:40:52,890 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-21 16:40:52,901 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:40:52,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:40:52,927 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:40:52,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:40:52,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:40:52,952 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:40:52,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:40:52,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:40:52,953 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:40:52,953 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:40:52,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:40:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-21 16:40:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 16:40:52,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:52,983 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 16:40:52,983 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-21 16:40:52,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:53,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556639339] [2020-07-21 16:40:53,001 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 16:40:53,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:40:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:53,200 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 16:40:53,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:53,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556639339] [2020-07-21 16:40:53,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:53,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:40:53,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514886270] [2020-07-21 16:40:53,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:40:53,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:40:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:40:53,227 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-21 16:40:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:53,456 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-21 16:40:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:40:53,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-21 16:40:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:53,467 INFO L225 Difference]: With dead ends: 73 [2020-07-21 16:40:53,467 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 16:40:53,470 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 16:40:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 16:40:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-21 16:40:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 16:40:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-21 16:40:53,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-21 16:40:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:53,528 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-21 16:40:53,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:40:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-21 16:40:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 16:40:53,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:53,532 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 16:40:53,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:53,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-21 16:40:53,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:53,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227370736] [2020-07-21 16:40:53,749 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 16:40:53,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:40:53,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:53,925 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 16:40:53,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:53,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227370736] [2020-07-21 16:40:53,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:53,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:40:53,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96756485] [2020-07-21 16:40:53,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:40:53,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:40:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:40:53,933 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-21 16:40:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:54,022 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-21 16:40:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:40:54,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-21 16:40:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:54,025 INFO L225 Difference]: With dead ends: 65 [2020-07-21 16:40:54,025 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 16:40:54,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 16:40:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 16:40:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 16:40:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 16:40:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 16:40:54,037 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-21 16:40:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:54,038 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 16:40:54,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:40:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 16:40:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 16:40:54,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:54,041 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 16:40:54,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:54,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-21 16:40:54,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:54,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419332171] [2020-07-21 16:40:54,257 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 16:40:54,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:54,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:40:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 16:40:54,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:40:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 16:40:54,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419332171] [2020-07-21 16:40:54,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:40:54,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 16:40:54,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729658523] [2020-07-21 16:40:54,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:40:54,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:40:54,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:40:54,523 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states. [2020-07-21 16:40:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:54,657 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-21 16:40:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:40:54,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-21 16:40:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:54,659 INFO L225 Difference]: With dead ends: 67 [2020-07-21 16:40:54,659 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 16:40:54,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 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 16:40:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 16:40:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-21 16:40:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 16:40:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-21 16:40:54,668 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-21 16:40:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:54,669 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-21 16:40:54,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:40:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-21 16:40:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 16:40:54,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:54,671 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] [2020-07-21 16:40:54,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:54,885 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-21 16:40:54,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:54,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301194798] [2020-07-21 16:40:54,888 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 16:40:54,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:40:54,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 16:40:54,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:54,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301194798] [2020-07-21 16:40:54,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:54,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:40:54,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268360629] [2020-07-21 16:40:54,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:40:54,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:40:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:40:54,985 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-21 16:40:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:55,055 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-21 16:40:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:40:55,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-21 16:40:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:55,058 INFO L225 Difference]: With dead ends: 65 [2020-07-21 16:40:55,058 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 16:40:55,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 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 16:40:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 16:40:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-21 16:40:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 16:40:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 16:40:55,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-21 16:40:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:55,068 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 16:40:55,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:40:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 16:40:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 16:40:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:55,070 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] [2020-07-21 16:40:55,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:55,284 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-21 16:40:55,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:55,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31739624] [2020-07-21 16:40:55,286 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 16:40:55,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:55,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:55,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:40:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-21 16:40:55,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:40:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 16:40:55,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31739624] [2020-07-21 16:40:55,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:40:55,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 16:40:55,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706955403] [2020-07-21 16:40:55,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:40:55,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:40:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:40:55,531 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-07-21 16:40:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:55,654 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-21 16:40:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:40:55,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-21 16:40:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:55,658 INFO L225 Difference]: With dead ends: 70 [2020-07-21 16:40:55,658 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 16:40:55,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 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 16:40:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 16:40:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-21 16:40:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 16:40:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-21 16:40:55,674 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-21 16:40:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:55,676 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-21 16:40:55,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:40:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-21 16:40:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 16:40:55,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:55,680 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] [2020-07-21 16:40:55,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:55,896 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-21 16:40:55,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:55,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509135513] [2020-07-21 16:40:55,897 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 16:40:55,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:55,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:40:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 16:40:56,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:56,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509135513] [2020-07-21 16:40:56,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:56,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:40:56,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151059588] [2020-07-21 16:40:56,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:40:56,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:40:56,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:40:56,045 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-07-21 16:40:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:56,154 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-21 16:40:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:40:56,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-21 16:40:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:56,157 INFO L225 Difference]: With dead ends: 69 [2020-07-21 16:40:56,158 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 16:40:56,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 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 16:40:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 16:40:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-21 16:40:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 16:40:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 16:40:56,167 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-21 16:40:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:56,167 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 16:40:56,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:40:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 16:40:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 16:40:56,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:56,169 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 16:40:56,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:56,384 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-21 16:40:56,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:56,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70118523] [2020-07-21 16:40:56,386 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 16:40:56,458 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:56,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:56,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 16:40:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:56,557 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 16:40:56,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:40:56,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70118523] [2020-07-21 16:40:56,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:40:56,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 16:40:56,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26283804] [2020-07-21 16:40:56,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:40:56,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:40:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:40:56,560 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-21 16:40:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:56,647 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-21 16:40:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:40:56,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-21 16:40:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:56,649 INFO L225 Difference]: With dead ends: 74 [2020-07-21 16:40:56,649 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 16:40:56,652 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 16:40:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 16:40:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-21 16:40:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 16:40:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-21 16:40:56,669 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-21 16:40:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:56,669 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-21 16:40:56,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:40:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-21 16:40:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 16:40:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:56,671 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 16:40:56,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:56,883 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-21 16:40:56,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:56,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577125103] [2020-07-21 16:40:56,885 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 16:40:56,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:56,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:40:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 16:40:57,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:40:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 16:40:57,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577125103] [2020-07-21 16:40:57,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:40:57,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 16:40:57,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684991384] [2020-07-21 16:40:57,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 16:40:57,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 16:40:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:40:57,223 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-21 16:40:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:57,489 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-21 16:40:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:40:57,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 16:40:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:57,494 INFO L225 Difference]: With dead ends: 139 [2020-07-21 16:40:57,494 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 16:40:57,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:40:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 16:40:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-21 16:40:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 16:40:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-21 16:40:57,526 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-21 16:40:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:57,527 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-21 16:40:57,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 16:40:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-21 16:40:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 16:40:57,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:57,532 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 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 16:40:57,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:57,739 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-21 16:40:57,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:57,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332090341] [2020-07-21 16:40:57,741 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 16:40:57,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:40:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:57,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:40:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 16:40:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:40:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 16:40:58,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332090341] [2020-07-21 16:40:58,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:40:58,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 16:40:58,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29451213] [2020-07-21 16:40:58,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 16:40:58,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 16:40:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 16:40:58,045 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-21 16:40:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:58,234 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-21 16:40:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:40:58,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-21 16:40:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:58,236 INFO L225 Difference]: With dead ends: 129 [2020-07-21 16:40:58,236 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 16:40:58,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 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 16:40:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 16:40:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-21 16:40:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 16:40:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-21 16:40:58,248 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-21 16:40:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:58,248 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-21 16:40:58,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 16:40:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-21 16:40:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 16:40:58,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:58,250 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 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, 1] [2020-07-21 16:40:58,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:58,460 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-21 16:40:58,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:58,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696621950] [2020-07-21 16:40:58,462 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 16:40:58,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:40:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:40:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:40:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 16:40:58,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:40:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 16:40:58,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696621950] [2020-07-21 16:40:58,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:40:58,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 16:40:58,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298993482] [2020-07-21 16:40:58,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:40:58,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:40:58,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:40:58,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:40:58,758 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-21 16:40:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:40:58,886 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 16:40:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:40:58,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-21 16:40:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:40:58,889 INFO L225 Difference]: With dead ends: 86 [2020-07-21 16:40:58,889 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 16:40:58,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:40:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 16:40:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-21 16:40:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 16:40:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-21 16:40:58,900 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-21 16:40:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:40:58,900 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-21 16:40:58,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:40:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-21 16:40:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-21 16:40:58,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:40:58,903 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 16:40:59,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:59,114 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:40:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:40:59,115 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-21 16:40:59,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:40:59,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486092328] [2020-07-21 16:40:59,116 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 16:40:59,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:40:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:40:59,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:40:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:40:59,354 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:40:59,450 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:40:59,451 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:40:59,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:40:59,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:40:59 BoogieIcfgContainer [2020-07-21 16:40:59,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:40:59,735 INFO L168 Benchmark]: Toolchain (without parser) took 7909.53 ms. Allocated memory was 136.3 MB in the beginning and 284.7 MB in the end (delta: 148.4 MB). Free memory was 99.0 MB in the beginning and 196.1 MB in the end (delta: -97.1 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:59,736 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory is still 117.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:40:59,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 550.24 ms. Allocated memory was 136.3 MB in the beginning and 202.4 MB in the end (delta: 66.1 MB). Free memory was 98.5 MB in the beginning and 181.0 MB in the end (delta: -82.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:59,738 INFO L168 Benchmark]: Boogie Preprocessor took 75.10 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 178.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:59,738 INFO L168 Benchmark]: RCFGBuilder took 427.48 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 160.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:59,739 INFO L168 Benchmark]: TraceAbstraction took 6849.86 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 159.3 MB in the beginning and 196.1 MB in the end (delta: -36.8 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:40:59,744 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory is still 117.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 550.24 ms. Allocated memory was 136.3 MB in the beginning and 202.4 MB in the end (delta: 66.1 MB). Free memory was 98.5 MB in the beginning and 181.0 MB in the end (delta: -82.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.10 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 178.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.48 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 160.3 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6849.86 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 159.3 MB in the beginning and 196.1 MB in the end (delta: -36.8 MB). Peak memory consumption was 45.5 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=2147483647, 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=2147483647, 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: 6.7s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 329 SDtfs, 280 SDslu, 591 SDs, 0 SdLazy, 640 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 832 GetRequests, 745 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=8, 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, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 611 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 817 ConstructedInterpolants, 0 QuantifiedInterpolants, 98205 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1550 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 957/1066 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...