/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_FUNCTIONS --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 14:14:29,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:14:29,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:14:29,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:14:29,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:14:29,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:14:29,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:14:29,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:14:29,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:14:29,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:14:29,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:14:29,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:14:29,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:14:29,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:14:29,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:14:29,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:14:29,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:14:29,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:14:29,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:14:29,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:14:29,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:14:29,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:14:29,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:14:29,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:14:29,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:14:29,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:14:29,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:14:29,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:14:29,744 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 14:14:29,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:14:29,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:14:29,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:14:29,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:14:29,770 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:14:29,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:14:29,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:14:29,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:14:29,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:14:29,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:14:29,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:14:29,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:14:29,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:14:29,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:14:29,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:14:29,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:14:29,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:14:29,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:14:29,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:14:29,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:14:29,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:14:29,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:29,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:14:29,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:14:29,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:14:29,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:14:29,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:29,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:14:29,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:14:29,776 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_FUNCTIONS 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 14:14:30,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:14:30,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:14:30,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:14:30,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:14:30,077 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:14:30,078 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 14:14:30,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d4e1c10/415d78338a4e4480a6676727c7eefc47/FLAG34134fd95 [2020-07-20 14:14:30,633 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:14:30,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 14:14:30,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d4e1c10/415d78338a4e4480a6676727c7eefc47/FLAG34134fd95 [2020-07-20 14:14:31,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d4e1c10/415d78338a4e4480a6676727c7eefc47 [2020-07-20 14:14:31,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:14:31,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:14:31,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:31,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:14:31,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:14:31,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43513823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31, skipping insertion in model container [2020-07-20 14:14:31,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:14:31,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:14:31,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:31,267 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:14:31,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:31,311 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:14:31,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31 WrapperNode [2020-07-20 14:14:31,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:31,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:14:31,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:14:31,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:14:31,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (1/1) ... [2020-07-20 14:14:31,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:14:31,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:14:31,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:14:31,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:14:31,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (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 14:14:31,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:14:31,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:14:31,520 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 14:14:31,521 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 14:14:31,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:14:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:14:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:14:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 14:14:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:14:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:14:31,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:14:31,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:14:31,921 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 14:14:31,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:31 BoogieIcfgContainer [2020-07-20 14:14:31,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:14:31,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:14:31,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:14:31,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:14:31,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:31" (1/3) ... [2020-07-20 14:14:31,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf6a23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:31, skipping insertion in model container [2020-07-20 14:14:31,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:31" (2/3) ... [2020-07-20 14:14:31,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf6a23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:31, skipping insertion in model container [2020-07-20 14:14:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:31" (3/3) ... [2020-07-20 14:14:31,935 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-20 14:14:31,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:14:31,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:14:31,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:14:31,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:14:31,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:14:31,998 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:14:31,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:14:31,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:14:31,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:14:31,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:14:31,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:14:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 14:14:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 14:14:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:32,028 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 14:14:32,028 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-20 14:14:32,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:32,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524642346] [2020-07-20 14:14:32,044 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 14:14:32,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 14:14:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:32,219 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 14:14:32,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:32,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524642346] [2020-07-20 14:14:32,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:32,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:32,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10349133] [2020-07-20 14:14:32,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:32,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:32,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:32,248 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-20 14:14:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:32,305 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 14:14:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:32,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 14:14:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:32,319 INFO L225 Difference]: With dead ends: 70 [2020-07-20 14:14:32,319 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 14:14:32,324 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 14:14:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 14:14:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 14:14:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 14:14:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-20 14:14:32,378 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2020-07-20 14:14:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:32,378 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-20 14:14:32,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-20 14:14:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 14:14:32,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:32,382 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 14:14:32,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:32,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1493850473, now seen corresponding path program 1 times [2020-07-20 14:14:32,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:32,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153067326] [2020-07-20 14:14:32,601 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 14:14:32,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:32,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 14:14:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:32,715 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 14:14:32,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:32,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153067326] [2020-07-20 14:14:32,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:32,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:32,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363346839] [2020-07-20 14:14:32,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:32,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:32,720 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 3 states. [2020-07-20 14:14:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:32,755 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-07-20 14:14:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:32,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 14:14:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:32,758 INFO L225 Difference]: With dead ends: 61 [2020-07-20 14:14:32,758 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 14:14:32,759 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 14:14:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 14:14:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 14:14:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 14:14:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 14:14:32,769 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-07-20 14:14:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:32,769 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 14:14:32,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 14:14:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 14:14:32,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:32,772 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 14:14:32,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:32,987 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1518301407, now seen corresponding path program 1 times [2020-07-20 14:14:32,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:32,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053249623] [2020-07-20 14:14:32,989 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 14:14:33,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:33,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 14:14:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:33,095 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 14:14:33,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:33,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053249623] [2020-07-20 14:14:33,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:33,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:33,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737304063] [2020-07-20 14:14:33,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:33,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:33,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:33,099 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2020-07-20 14:14:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:33,116 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-20 14:14:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:33,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-07-20 14:14:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:33,119 INFO L225 Difference]: With dead ends: 68 [2020-07-20 14:14:33,119 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 14:14:33,120 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 14:14:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 14:14:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 14:14:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 14:14:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 14:14:33,128 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 46 [2020-07-20 14:14:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:33,129 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 14:14:33,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 14:14:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 14:14:33,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:33,131 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 14:14:33,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:33,346 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2020-07-20 14:14:33,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462732342] [2020-07-20 14:14:33,359 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 14:14:33,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:33,450 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 14:14:33,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:33,510 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 14:14:33,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462732342] [2020-07-20 14:14:33,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:33,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 14:14:33,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456148305] [2020-07-20 14:14:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:14:33,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:14:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:14:33,514 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-07-20 14:14:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:33,550 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-07-20 14:14:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:14:33,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-20 14:14:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:33,552 INFO L225 Difference]: With dead ends: 73 [2020-07-20 14:14:33,553 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 14:14:33,554 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 14:14:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 14:14:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 14:14:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 14:14:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-20 14:14:33,562 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 48 [2020-07-20 14:14:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:33,563 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-20 14:14:33,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:14:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-20 14:14:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 14:14:33,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:33,565 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 14:14:33,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:33,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2144769321, now seen corresponding path program 2 times [2020-07-20 14:14:33,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:33,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526216658] [2020-07-20 14:14:33,781 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 14:14:33,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:14:33,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 14:14:33,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 14:14:33,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526216658] [2020-07-20 14:14:33,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:33,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 14:14:33,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566890543] [2020-07-20 14:14:33,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:14:33,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:14:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:14:33,991 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 7 states. [2020-07-20 14:14:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,028 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-07-20 14:14:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:14:34,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-07-20 14:14:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,031 INFO L225 Difference]: With dead ends: 75 [2020-07-20 14:14:34,031 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 14:14:34,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:14:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 14:14:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 14:14:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 14:14:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-20 14:14:34,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 54 [2020-07-20 14:14:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,042 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-20 14:14:34,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:14:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-20 14:14:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 14:14:34,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:34,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:34,259 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1165991573, now seen corresponding path program 3 times [2020-07-20 14:14:34,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:34,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942577544] [2020-07-20 14:14:34,261 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 14:14:34,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 14:14:34,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-20 14:14:34,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:34,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942577544] [2020-07-20 14:14:34,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:34,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:34,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012356840] [2020-07-20 14:14:34,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:34,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:34,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:34,366 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 3 states. [2020-07-20 14:14:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,382 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-07-20 14:14:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:34,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-07-20 14:14:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,384 INFO L225 Difference]: With dead ends: 68 [2020-07-20 14:14:34,384 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 14:14:34,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 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 14:14:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 14:14:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-20 14:14:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 14:14:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-20 14:14:34,393 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 56 [2020-07-20 14:14:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,393 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-20 14:14:34,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-20 14:14:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 14:14:34,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,395 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 14:14:34,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:34,610 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash 466239373, now seen corresponding path program 1 times [2020-07-20 14:14:34,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:34,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941927585] [2020-07-20 14:14:34,612 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 14:14:34,712 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:34,746 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 14:14:34,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:34,808 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 14:14:34,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941927585] [2020-07-20 14:14:34,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:34,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 14:14:34,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772376085] [2020-07-20 14:14:34,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:14:34,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:14:34,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:14:34,811 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-07-20 14:14:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,852 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 14:14:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:14:34,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-07-20 14:14:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,854 INFO L225 Difference]: With dead ends: 80 [2020-07-20 14:14:34,854 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 14:14:34,855 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 14:14:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 14:14:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-20 14:14:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 14:14:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-20 14:14:34,863 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 58 [2020-07-20 14:14:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,863 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-20 14:14:34,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:14:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-20 14:14:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 14:14:34,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,866 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 14:14:35,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:35,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1145938068, now seen corresponding path program 1 times [2020-07-20 14:14:35,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:35,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704799012] [2020-07-20 14:14:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:35,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:14:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-07-20 14:14:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 14:14:35,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704799012] [2020-07-20 14:14:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:35,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 14:14:35,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179395533] [2020-07-20 14:14:35,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:14:35,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:14:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:14:35,593 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-07-20 14:14:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:35,629 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-07-20 14:14:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:14:35,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-20 14:14:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:35,636 INFO L225 Difference]: With dead ends: 81 [2020-07-20 14:14:35,636 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 14:14:35,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:14:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 14:14:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 14:14:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 14:14:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-20 14:14:35,650 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 85 [2020-07-20 14:14:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:35,650 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-20 14:14:35,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:14:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-20 14:14:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 14:14:35,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:35,655 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:35,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,865 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -855759126, now seen corresponding path program 2 times [2020-07-20 14:14:35,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:35,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851628389] [2020-07-20 14:14:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:36,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:14:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-20 14:14:36,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-07-20 14:14:36,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851628389] [2020-07-20 14:14:36,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:36,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 14:14:36,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470177203] [2020-07-20 14:14:36,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:14:36,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:14:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:14:36,230 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-07-20 14:14:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:36,280 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-07-20 14:14:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:14:36,281 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-07-20 14:14:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:36,282 INFO L225 Difference]: With dead ends: 84 [2020-07-20 14:14:36,282 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 14:14:36,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:14:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 14:14:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-20 14:14:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 14:14:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-20 14:14:36,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 85 [2020-07-20 14:14:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:36,290 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-20 14:14:36,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:14:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-20 14:14:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 14:14:36,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:36,292 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:36,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:36,506 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:36,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 3 times [2020-07-20 14:14:36,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:36,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392874941] [2020-07-20 14:14:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:38,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:14:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 14:14:38,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-07-20 14:14:38,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392874941] [2020-07-20 14:14:38,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:38,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 14:14:38,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114148563] [2020-07-20 14:14:38,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:14:38,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:14:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:14:38,980 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-20 14:14:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:39,011 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-20 14:14:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:14:39,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-20 14:14:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:39,013 INFO L225 Difference]: With dead ends: 87 [2020-07-20 14:14:39,013 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 14:14:39,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:14:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 14:14:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 14:14:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 14:14:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-20 14:14:39,026 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-20 14:14:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:39,027 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-20 14:14:39,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:14:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-20 14:14:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 14:14:39,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:39,034 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:39,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:39,247 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 4 times [2020-07-20 14:14:39,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:39,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639613408] [2020-07-20 14:14:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in