/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:12:46,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:12:46,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:12:46,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:12:46,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:12:46,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:12:46,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:12:46,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:12:46,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:12:46,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:12:46,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:12:46,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:12:46,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:12:46,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:12:46,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:12:46,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:12:46,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:12:46,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:12:46,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:12:46,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:12:46,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:12:46,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:12:46,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:12:46,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:12:46,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:12:46,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:12:46,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:12:46,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:12:46,553 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 [2020-07-20 22:12:46,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:12:46,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:12:46,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:12:46,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:12:46,569 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:12:46,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:12:46,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:12:46,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:12:46,571 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:12:46,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:12:46,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:12:46,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:12:46,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:12:46,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:12:46,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:12:46,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:12:46,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:12:46,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:12:46,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:12:46,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:12:46,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:12:46,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:46,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:12:46,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:12:46,574 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 -> 4 [2020-07-20 22:12:46,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:12:46,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:12:46,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:12:46,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:12:46,888 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:12:46,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 22:12:46,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfb16b9a/2077e79252524c61bfb3b93786318bf1/FLAGe34ed65a6 [2020-07-20 22:12:47,456 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:12:47,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 22:12:47,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfb16b9a/2077e79252524c61bfb3b93786318bf1/FLAGe34ed65a6 [2020-07-20 22:12:47,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfb16b9a/2077e79252524c61bfb3b93786318bf1 [2020-07-20 22:12:47,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:12:47,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:12:47,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:47,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:12:47,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:12:47,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cbcc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:47, skipping insertion in model container [2020-07-20 22:12:47,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:47" (1/1) ... [2020-07-20 22:12:47,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:12:47,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:12:48,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:48,038 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:12:48,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:48,079 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:12:48,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48 WrapperNode [2020-07-20 22:12:48,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:48,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:12:48,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:12:48,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:12:48,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:12:48,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:12:48,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:12:48,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:12:48,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (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 [2020-07-20 22:12:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:12:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:12:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 22:12:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 22:12:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:12:48,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:12:48,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:12:48,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:12:48,695 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:12:48,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48 BoogieIcfgContainer [2020-07-20 22:12:48,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:12:48,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:12:48,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:12:48,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:12:48,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:12:47" (1/3) ... [2020-07-20 22:12:48,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad94701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (2/3) ... [2020-07-20 22:12:48,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad94701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48" (3/3) ... [2020-07-20 22:12:48,707 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-20 22:12:48,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:12:48,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:12:48,733 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:12:48,765 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:12:48,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:12:48,766 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:12:48,766 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:12:48,766 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:12:48,766 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:12:48,767 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:12:48,767 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:12:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 22:12:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 22:12:48,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:48,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:48,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-20 22:12:48,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:48,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602832820] [2020-07-20 22:12:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:48,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:12:48,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 22:12:48,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:48,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602832820] [2020-07-20 22:12:48,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:48,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:48,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637062446] [2020-07-20 22:12:49,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:49,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,019 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-20 22:12:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,084 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 22:12:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:49,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 22:12:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,096 INFO L225 Difference]: With dead ends: 70 [2020-07-20 22:12:49,096 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 22:12:49,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 22:12:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 22:12:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:12:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-20 22:12:49,141 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2020-07-20 22:12:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,142 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-20 22:12:49,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-20 22:12:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 22:12:49,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:49,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,360 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1493850473, now seen corresponding path program 1 times [2020-07-20 22:12:49,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741171959] [2020-07-20 22:12:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 22:12:49,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:49,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741171959] [2020-07-20 22:12:49,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:49,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:49,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225944932] [2020-07-20 22:12:49,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:49,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:49,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,469 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 3 states. [2020-07-20 22:12:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,493 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-07-20 22:12:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:49,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 22:12:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,495 INFO L225 Difference]: With dead ends: 61 [2020-07-20 22:12:49,495 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 22:12:49,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 22:12:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 22:12:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 22:12:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 22:12:49,504 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-07-20 22:12:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,505 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 22:12:49,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 22:12:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 22:12:49,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:49,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,722 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1518301407, now seen corresponding path program 1 times [2020-07-20 22:12:49,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421033396] [2020-07-20 22:12:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:49,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 22:12:49,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:49,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421033396] [2020-07-20 22:12:49,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:49,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:49,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329381134] [2020-07-20 22:12:49,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:49,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,842 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2020-07-20 22:12:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,862 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-20 22:12:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:49,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-07-20 22:12:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,866 INFO L225 Difference]: With dead ends: 68 [2020-07-20 22:12:49,866 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 22:12:49,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 22:12:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 22:12:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 22:12:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 22:12:49,887 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 46 [2020-07-20 22:12:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,888 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 22:12:49,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 22:12:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 22:12:49,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:50,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,111 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2020-07-20 22:12:50,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850204506] [2020-07-20 22:12:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 22:12:50,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 22:12:50,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850204506] [2020-07-20 22:12:50,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:50,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:12:50,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829587465] [2020-07-20 22:12:50,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:12:50,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:12:50,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:50,313 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-07-20 22:12:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:50,349 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-07-20 22:12:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:12:50,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-20 22:12:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:50,351 INFO L225 Difference]: With dead ends: 73 [2020-07-20 22:12:50,351 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 22:12:50,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 22:12:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 22:12:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 22:12:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-20 22:12:50,360 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 48 [2020-07-20 22:12:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:50,360 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-20 22:12:50,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:12:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-20 22:12:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 22:12:50,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:50,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:50,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,577 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2144769321, now seen corresponding path program 2 times [2020-07-20 22:12:50,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186396154] [2020-07-20 22:12:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,645 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:50,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 22:12:50,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:50,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186396154] [2020-07-20 22:12:50,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:50,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:50,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604697520] [2020-07-20 22:12:50,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:50,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:50,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:50,673 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 3 states. [2020-07-20 22:12:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:50,690 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-07-20 22:12:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:50,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-07-20 22:12:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:50,693 INFO L225 Difference]: With dead ends: 66 [2020-07-20 22:12:50,693 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 22:12:50,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 22:12:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 22:12:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 22:12:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 22:12:50,701 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 54 [2020-07-20 22:12:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:50,701 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 22:12:50,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 22:12:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 22:12:50,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:50,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:50,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,919 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -463307829, now seen corresponding path program 1 times [2020-07-20 22:12:50,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017804114] [2020-07-20 22:12:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,025 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:12:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 22:12:51,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 22:12:51,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017804114] [2020-07-20 22:12:51,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:51,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 22:12:51,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775398114] [2020-07-20 22:12:51,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:12:51,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:51,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:12:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:12:51,229 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-07-20 22:12:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:51,274 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-07-20 22:12:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:12:51,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-20 22:12:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:51,276 INFO L225 Difference]: With dead ends: 77 [2020-07-20 22:12:51,277 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 22:12:51,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:12:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 22:12:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 22:12:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 22:12:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-20 22:12:51,291 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 56 [2020-07-20 22:12:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:51,293 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-20 22:12:51,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:12:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-20 22:12:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 22:12:51,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:51,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:51,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,498 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 466239373, now seen corresponding path program 2 times [2020-07-20 22:12:51,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:51,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364876956] [2020-07-20 22:12:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,616 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:51,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 22:12:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 22:12:51,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364876956] [2020-07-20 22:12:51,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:51,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:12:51,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352419384] [2020-07-20 22:12:51,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:12:51,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:12:51,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:51,701 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-07-20 22:12:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:51,745 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 22:12:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:12:51,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-07-20 22:12:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:51,747 INFO L225 Difference]: With dead ends: 80 [2020-07-20 22:12:51,747 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 22:12:51,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 22:12:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-20 22:12:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 22:12:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-20 22:12:51,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 58 [2020-07-20 22:12:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:51,757 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-20 22:12:51,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:12:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-20 22:12:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 22:12:51,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:51,759 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:12:51,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,972 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1145938068, now seen corresponding path program 1 times [2020-07-20 22:12:51,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:51,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964768357] [2020-07-20 22:12:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in