/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/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:49:05,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:49:05,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:49:05,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:49:05,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:49:05,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:49:05,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:49:05,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:49:05,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:49:05,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:49:05,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:49:05,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:49:05,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:49:05,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:49:05,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:49:05,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:49:05,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:49:05,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:49:05,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:49:05,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:49:05,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:49:05,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:49:05,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:49:05,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:49:05,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:49:05,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:49:05,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:49:05,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:49:05,612 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 21:49:05,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:49:05,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:49:05,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:49:05,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:49:05,632 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:49:05,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:49:05,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:49:05,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:49:05,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:49:05,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:49:05,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:49:05,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:49:05,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:49:05,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:49:05,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:49:05,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:49:05,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:49:05,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:49:05,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:49:05,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:49:05,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:49:05,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:05,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:49:05,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:49:05,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:49:05,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:49:05,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:05,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:49:05,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:49:05,637 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 21:49:05,979 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:49:06,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:49:06,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:49:06,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:49:06,007 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:49:06,007 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-07-20 21:49:06,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2c173b3/2edd79914a154e9d8b60368c5ed43005/FLAG713d5ed77 [2020-07-20 21:49:06,666 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:49:06,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-07-20 21:49:06,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2c173b3/2edd79914a154e9d8b60368c5ed43005/FLAG713d5ed77 [2020-07-20 21:49:07,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2c173b3/2edd79914a154e9d8b60368c5ed43005 [2020-07-20 21:49:07,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:49:07,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:49:07,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:07,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:49:07,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:49:07,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ebf14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07, skipping insertion in model container [2020-07-20 21:49:07,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:49:07,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:49:07,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:07,263 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:49:07,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:07,303 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:49:07,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07 WrapperNode [2020-07-20 21:49:07,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:07,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:49:07,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:49:07,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:49:07,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (1/1) ... [2020-07-20 21:49:07,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:49:07,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:49:07,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:49:07,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:49:07,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (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 21:49:07,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:49:07,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:49:07,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:49:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:49:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:49:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:49:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:49:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:49:07,896 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:49:07,897 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:49:07,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:07 BoogieIcfgContainer [2020-07-20 21:49:07,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:49:07,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:49:07,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:49:07,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:49:07,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:07" (1/3) ... [2020-07-20 21:49:07,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dbd2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:07, skipping insertion in model container [2020-07-20 21:49:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:07" (2/3) ... [2020-07-20 21:49:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dbd2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:07, skipping insertion in model container [2020-07-20 21:49:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:07" (3/3) ... [2020-07-20 21:49:07,912 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-07-20 21:49:07,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:49:07,934 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:49:07,953 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:49:07,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:49:07,983 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:49:07,983 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:49:07,983 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:49:07,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:49:07,984 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:49:07,984 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:49:07,984 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:49:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-20 21:49:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:08,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:08,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-07-20 21:49:08,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:08,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978989853] [2020-07-20 21:49:08,062 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 21:49:08,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:08,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:08,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978989853] [2020-07-20 21:49:08,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:08,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:08,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876765280] [2020-07-20 21:49:08,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:08,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:08,317 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-07-20 21:49:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:08,379 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-07-20 21:49:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:08,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:08,394 INFO L225 Difference]: With dead ends: 87 [2020-07-20 21:49:08,394 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:49:08,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:49:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:49:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 21:49:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 21:49:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-07-20 21:49:08,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-07-20 21:49:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:08,461 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-07-20 21:49:08,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-07-20 21:49:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:08,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:08,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:08,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:08,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-07-20 21:49:08,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:08,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545711581] [2020-07-20 21:49:08,671 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 21:49:08,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:08,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:08,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545711581] [2020-07-20 21:49:08,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:08,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:08,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754185453] [2020-07-20 21:49:08,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:08,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:08,759 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-07-20 21:49:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:08,794 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-07-20 21:49:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:08,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:08,797 INFO L225 Difference]: With dead ends: 117 [2020-07-20 21:49:08,797 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 21:49:08,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:49:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 21:49:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-20 21:49:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 21:49:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-07-20 21:49:08,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-07-20 21:49:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:08,812 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-07-20 21:49:08,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-07-20 21:49:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:08,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:08,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:09,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:09,029 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-07-20 21:49:09,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:09,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167130552] [2020-07-20 21:49:09,030 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 21:49:09,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:09,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:09,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:09,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167130552] [2020-07-20 21:49:09,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:09,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:09,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786333832] [2020-07-20 21:49:09,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:09,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:09,111 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-07-20 21:49:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:09,134 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-07-20 21:49:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:09,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:09,137 INFO L225 Difference]: With dead ends: 108 [2020-07-20 21:49:09,137 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 21:49:09,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:49:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 21:49:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-07-20 21:49:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 21:49:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-07-20 21:49:09,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-07-20 21:49:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:09,157 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-07-20 21:49:09,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-07-20 21:49:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:09,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:09,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:09,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:09,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-07-20 21:49:09,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:09,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357083778] [2020-07-20 21:49:09,376 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 21:49:09,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:09,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:09,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:09,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:09,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357083778] [2020-07-20 21:49:09,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:09,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:09,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721038577] [2020-07-20 21:49:09,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:09,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:09,454 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-07-20 21:49:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:09,486 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-07-20 21:49:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:09,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:09,489 INFO L225 Difference]: With dead ends: 136 [2020-07-20 21:49:09,490 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 21:49:09,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:49:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 21:49:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-07-20 21:49:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 21:49:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-07-20 21:49:09,504 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-07-20 21:49:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:09,507 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-07-20 21:49:09,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-07-20 21:49:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:09,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:09,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:09,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:09,710 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-07-20 21:49:09,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:09,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224920429] [2020-07-20 21:49:09,714 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 21:49:09,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:09,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:09,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:09,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224920429] [2020-07-20 21:49:09,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:09,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:09,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580123057] [2020-07-20 21:49:09,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:09,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:09,803 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-07-20 21:49:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:09,826 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-07-20 21:49:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:09,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:09,829 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:49:09,829 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 21:49:09,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:49:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 21:49:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-20 21:49:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:49:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-07-20 21:49:09,844 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-07-20 21:49:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:09,845 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-07-20 21:49:09,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-07-20 21:49:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:09,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:09,846 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:10,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:10,061 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-07-20 21:49:10,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:10,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278793090] [2020-07-20 21:49:10,063 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 21:49:10,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:10,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:10,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278793090] [2020-07-20 21:49:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:10,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:10,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061260072] [2020-07-20 21:49:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:10,121 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-07-20 21:49:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:10,141 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-07-20 21:49:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:10,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:10,143 INFO L225 Difference]: With dead ends: 201 [2020-07-20 21:49:10,143 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 21:49:10,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 21:49:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 21:49:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-20 21:49:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 21:49:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-07-20 21:49:10,166 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-07-20 21:49:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:10,167 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-07-20 21:49:10,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-07-20 21:49:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:10,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:10,172 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:10,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:10,385 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-07-20 21:49:10,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:10,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601227184] [2020-07-20 21:49:10,387 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 21:49:10,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:10,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:10,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601227184] [2020-07-20 21:49:10,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:10,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:10,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434556654] [2020-07-20 21:49:10,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:10,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:10,450 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-07-20 21:49:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:10,475 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-07-20 21:49:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:10,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:10,479 INFO L225 Difference]: With dead ends: 252 [2020-07-20 21:49:10,479 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 21:49:10,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 21:49:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 21:49:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-07-20 21:49:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 21:49:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-07-20 21:49:10,495 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-07-20 21:49:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:10,496 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-07-20 21:49:10,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-07-20 21:49:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:10,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:10,498 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:10,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:10,714 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-07-20 21:49:10,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:10,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999376307] [2020-07-20 21:49:10,716 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 21:49:10,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:10,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:10,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999376307] [2020-07-20 21:49:10,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:10,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:10,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549428502] [2020-07-20 21:49:10,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:10,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:10,785 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-07-20 21:49:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:10,816 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-07-20 21:49:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:10,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:10,820 INFO L225 Difference]: With dead ends: 432 [2020-07-20 21:49:10,820 INFO L226 Difference]: Without dead ends: 258 [2020-07-20 21:49:10,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 21:49:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-20 21:49:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-20 21:49:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-20 21:49:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-07-20 21:49:10,848 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-07-20 21:49:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:10,848 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-07-20 21:49:10,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-07-20 21:49:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:10,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:10,850 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:11,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:11,064 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-07-20 21:49:11,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:11,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692897178] [2020-07-20 21:49:11,066 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 21:49:11,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:11,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:11,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692897178] [2020-07-20 21:49:11,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:11,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:11,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260676050] [2020-07-20 21:49:11,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:11,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:11,131 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-07-20 21:49:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:11,151 INFO L93 Difference]: Finished difference Result 472 states and 812 transitions. [2020-07-20 21:49:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:11,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:11,155 INFO L225 Difference]: With dead ends: 472 [2020-07-20 21:49:11,156 INFO L226 Difference]: Without dead ends: 470 [2020-07-20 21:49:11,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 21:49:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-07-20 21:49:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 356. [2020-07-20 21:49:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-07-20 21:49:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 594 transitions. [2020-07-20 21:49:11,173 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 594 transitions. Word has length 23 [2020-07-20 21:49:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:11,174 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 594 transitions. [2020-07-20 21:49:11,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 594 transitions. [2020-07-20 21:49:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:11,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:11,177 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:11,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:11,392 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1809975368, now seen corresponding path program 1 times [2020-07-20 21:49:11,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:11,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295526320] [2020-07-20 21:49:11,394 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 21:49:11,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:11,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:11,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295526320] [2020-07-20 21:49:11,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:11,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:11,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913343601] [2020-07-20 21:49:11,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:11,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:11,451 INFO L87 Difference]: Start difference. First operand 356 states and 594 transitions. Second operand 3 states. [2020-07-20 21:49:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:11,475 INFO L93 Difference]: Finished difference Result 532 states and 884 transitions. [2020-07-20 21:49:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:11,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:11,479 INFO L225 Difference]: With dead ends: 532 [2020-07-20 21:49:11,479 INFO L226 Difference]: Without dead ends: 362 [2020-07-20 21:49:11,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 21:49:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-20 21:49:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-07-20 21:49:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-20 21:49:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-07-20 21:49:11,500 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-07-20 21:49:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:11,500 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-07-20 21:49:11,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-07-20 21:49:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:11,502 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:11,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:11,717 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-07-20 21:49:11,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:11,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369014846] [2020-07-20 21:49:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:11,756 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:11,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:11,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369014846] [2020-07-20 21:49:11,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:11,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:11,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084815572] [2020-07-20 21:49:11,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:11,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:11,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:11,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:11,784 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-07-20 21:49:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:11,828 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-07-20 21:49:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:11,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:11,834 INFO L225 Difference]: With dead ends: 844 [2020-07-20 21:49:11,834 INFO L226 Difference]: Without dead ends: 498 [2020-07-20 21:49:11,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 21:49:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-07-20 21:49:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-07-20 21:49:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-20 21:49:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-07-20 21:49:11,861 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-07-20 21:49:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:11,862 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-07-20 21:49:11,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-07-20 21:49:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:11,866 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:12,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,082 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-07-20 21:49:12,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:12,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635905899] [2020-07-20 21:49:12,085 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,127 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:12,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:12,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635905899] [2020-07-20 21:49:12,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:12,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:12,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404646430] [2020-07-20 21:49:12,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:12,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:12,152 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-07-20 21:49:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:12,203 INFO L93 Difference]: Finished difference Result 900 states and 1488 transitions. [2020-07-20 21:49:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:12,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:12,210 INFO L225 Difference]: With dead ends: 900 [2020-07-20 21:49:12,211 INFO L226 Difference]: Without dead ends: 898 [2020-07-20 21:49:12,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 21:49:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-07-20 21:49:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 704. [2020-07-20 21:49:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-07-20 21:49:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1118 transitions. [2020-07-20 21:49:12,242 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1118 transitions. Word has length 24 [2020-07-20 21:49:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:12,243 INFO L479 AbstractCegarLoop]: Abstraction has 704 states and 1118 transitions. [2020-07-20 21:49:12,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1118 transitions. [2020-07-20 21:49:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:12,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:12,245 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:12,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,458 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash -580676479, now seen corresponding path program 1 times [2020-07-20 21:49:12,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:12,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517679954] [2020-07-20 21:49:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:12,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:12,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:12,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:12,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517679954] [2020-07-20 21:49:12,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:12,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:12,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036471723] [2020-07-20 21:49:12,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:12,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:12,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:12,507 INFO L87 Difference]: Start difference. First operand 704 states and 1118 transitions. Second operand 3 states. [2020-07-20 21:49:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:12,545 INFO L93 Difference]: Finished difference Result 1652 states and 2640 transitions. [2020-07-20 21:49:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:12,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:12,551 INFO L225 Difference]: With dead ends: 1652 [2020-07-20 21:49:12,551 INFO L226 Difference]: Without dead ends: 962 [2020-07-20 21:49:12,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 21:49:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-07-20 21:49:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 960. [2020-07-20 21:49:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-07-20 21:49:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1510 transitions. [2020-07-20 21:49:12,583 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1510 transitions. Word has length 24 [2020-07-20 21:49:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:12,583 INFO L479 AbstractCegarLoop]: Abstraction has 960 states and 1510 transitions. [2020-07-20 21:49:12,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1510 transitions. [2020-07-20 21:49:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:12,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:12,585 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:12,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,800 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:12,801 INFO L82 PathProgramCache]: Analyzing trace with hash 190230329, now seen corresponding path program 1 times [2020-07-20 21:49:12,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:12,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207051358] [2020-07-20 21:49:12,802 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:12,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:12,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:12,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:12,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207051358] [2020-07-20 21:49:12,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:12,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:12,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941194722] [2020-07-20 21:49:12,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:12,857 INFO L87 Difference]: Start difference. First operand 960 states and 1510 transitions. Second operand 3 states. [2020-07-20 21:49:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:12,896 INFO L93 Difference]: Finished difference Result 1716 states and 2744 transitions. [2020-07-20 21:49:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:12,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:12,908 INFO L225 Difference]: With dead ends: 1716 [2020-07-20 21:49:12,908 INFO L226 Difference]: Without dead ends: 1714 [2020-07-20 21:49:12,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 21:49:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-07-20 21:49:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1392. [2020-07-20 21:49:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1392 states. [2020-07-20 21:49:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2134 transitions. [2020-07-20 21:49:12,960 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2134 transitions. Word has length 25 [2020-07-20 21:49:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:12,961 INFO L479 AbstractCegarLoop]: Abstraction has 1392 states and 2134 transitions. [2020-07-20 21:49:12,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2134 transitions. [2020-07-20 21:49:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:12,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:12,963 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:13,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:13,178 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:13,179 INFO L82 PathProgramCache]: Analyzing trace with hash -396575685, now seen corresponding path program 1 times [2020-07-20 21:49:13,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:13,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311909297] [2020-07-20 21:49:13,180 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:13,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:13,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:13,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311909297] [2020-07-20 21:49:13,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:13,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:13,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216011564] [2020-07-20 21:49:13,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:13,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:13,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:13,254 INFO L87 Difference]: Start difference. First operand 1392 states and 2134 transitions. Second operand 3 states. [2020-07-20 21:49:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:13,314 INFO L93 Difference]: Finished difference Result 3252 states and 5016 transitions. [2020-07-20 21:49:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:13,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:13,327 INFO L225 Difference]: With dead ends: 3252 [2020-07-20 21:49:13,327 INFO L226 Difference]: Without dead ends: 1874 [2020-07-20 21:49:13,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 21:49:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-07-20 21:49:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-07-20 21:49:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-07-20 21:49:13,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2838 transitions. [2020-07-20 21:49:13,406 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2838 transitions. Word has length 25 [2020-07-20 21:49:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:13,407 INFO L479 AbstractCegarLoop]: Abstraction has 1872 states and 2838 transitions. [2020-07-20 21:49:13,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2838 transitions. [2020-07-20 21:49:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:49:13,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:13,411 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:13,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:13,626 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1602387988, now seen corresponding path program 1 times [2020-07-20 21:49:13,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:13,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026328699] [2020-07-20 21:49:13,627 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:13,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:13,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:13,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:13,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:13,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026328699] [2020-07-20 21:49:13,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:13,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:13,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830465408] [2020-07-20 21:49:13,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:13,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:13,684 INFO L87 Difference]: Start difference. First operand 1872 states and 2838 transitions. Second operand 3 states. [2020-07-20 21:49:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:13,741 INFO L93 Difference]: Finished difference Result 3284 states and 5048 transitions. [2020-07-20 21:49:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:13,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 21:49:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:13,758 INFO L225 Difference]: With dead ends: 3284 [2020-07-20 21:49:13,758 INFO L226 Difference]: Without dead ends: 3282 [2020-07-20 21:49:13,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 21:49:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2020-07-20 21:49:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 2768. [2020-07-20 21:49:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2020-07-20 21:49:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 4086 transitions. [2020-07-20 21:49:13,892 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 4086 transitions. Word has length 26 [2020-07-20 21:49:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:13,892 INFO L479 AbstractCegarLoop]: Abstraction has 2768 states and 4086 transitions. [2020-07-20 21:49:13,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 4086 transitions. [2020-07-20 21:49:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:49:13,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:13,898 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:14,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:14,112 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1015581974, now seen corresponding path program 1 times [2020-07-20 21:49:14,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:14,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319546302] [2020-07-20 21:49:14,113 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:14,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:14,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:14,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:14,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319546302] [2020-07-20 21:49:14,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:14,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:14,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952476764] [2020-07-20 21:49:14,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:14,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:14,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:14,165 INFO L87 Difference]: Start difference. First operand 2768 states and 4086 transitions. Second operand 3 states. [2020-07-20 21:49:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:14,258 INFO L93 Difference]: Finished difference Result 6420 states and 9528 transitions. [2020-07-20 21:49:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:14,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 21:49:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:14,280 INFO L225 Difference]: With dead ends: 6420 [2020-07-20 21:49:14,280 INFO L226 Difference]: Without dead ends: 3666 [2020-07-20 21:49:14,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 21:49:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-07-20 21:49:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3664. [2020-07-20 21:49:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3664 states. [2020-07-20 21:49:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 5334 transitions. [2020-07-20 21:49:14,401 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 5334 transitions. Word has length 26 [2020-07-20 21:49:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:14,401 INFO L479 AbstractCegarLoop]: Abstraction has 3664 states and 5334 transitions. [2020-07-20 21:49:14,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 5334 transitions. [2020-07-20 21:49:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:14,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:14,409 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:14,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:14,623 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1865364498, now seen corresponding path program 1 times [2020-07-20 21:49:14,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:14,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675547288] [2020-07-20 21:49:14,625 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:14,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:14,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:14,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675547288] [2020-07-20 21:49:14,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:14,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:14,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728511164] [2020-07-20 21:49:14,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:14,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:14,677 INFO L87 Difference]: Start difference. First operand 3664 states and 5334 transitions. Second operand 3 states. [2020-07-20 21:49:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:14,735 INFO L93 Difference]: Finished difference Result 5468 states and 7912 transitions. [2020-07-20 21:49:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:14,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:14,754 INFO L225 Difference]: With dead ends: 5468 [2020-07-20 21:49:14,754 INFO L226 Difference]: Without dead ends: 3674 [2020-07-20 21:49:14,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 21:49:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2020-07-20 21:49:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3672. [2020-07-20 21:49:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3672 states. [2020-07-20 21:49:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5222 transitions. [2020-07-20 21:49:14,903 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5222 transitions. Word has length 27 [2020-07-20 21:49:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:14,903 INFO L479 AbstractCegarLoop]: Abstraction has 3672 states and 5222 transitions. [2020-07-20 21:49:14,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5222 transitions. [2020-07-20 21:49:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:14,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:14,910 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:15,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:15,124 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash 841254896, now seen corresponding path program 1 times [2020-07-20 21:49:15,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:15,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909331179] [2020-07-20 21:49:15,125 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:15,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:15,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:15,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:15,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909331179] [2020-07-20 21:49:15,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:15,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:15,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172886992] [2020-07-20 21:49:15,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:15,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:15,179 INFO L87 Difference]: Start difference. First operand 3672 states and 5222 transitions. Second operand 3 states. [2020-07-20 21:49:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:15,238 INFO L93 Difference]: Finished difference Result 5484 states and 7752 transitions. [2020-07-20 21:49:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:15,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:15,256 INFO L225 Difference]: With dead ends: 5484 [2020-07-20 21:49:15,256 INFO L226 Difference]: Without dead ends: 3690 [2020-07-20 21:49:15,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 21:49:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2020-07-20 21:49:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3688. [2020-07-20 21:49:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3688 states. [2020-07-20 21:49:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 5126 transitions. [2020-07-20 21:49:15,364 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 5126 transitions. Word has length 27 [2020-07-20 21:49:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:15,365 INFO L479 AbstractCegarLoop]: Abstraction has 3688 states and 5126 transitions. [2020-07-20 21:49:15,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 5126 transitions. [2020-07-20 21:49:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:15,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:15,371 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:15,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:15,588 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash -179813458, now seen corresponding path program 1 times [2020-07-20 21:49:15,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:15,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796641573] [2020-07-20 21:49:15,589 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:15,626 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:15,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:15,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796641573] [2020-07-20 21:49:15,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:15,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:15,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778592104] [2020-07-20 21:49:15,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:15,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:15,643 INFO L87 Difference]: Start difference. First operand 3688 states and 5126 transitions. Second operand 3 states. [2020-07-20 21:49:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:15,701 INFO L93 Difference]: Finished difference Result 5516 states and 7624 transitions. [2020-07-20 21:49:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:15,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:15,736 INFO L225 Difference]: With dead ends: 5516 [2020-07-20 21:49:15,737 INFO L226 Difference]: Without dead ends: 3722 [2020-07-20 21:49:15,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 21:49:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-20 21:49:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-07-20 21:49:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-20 21:49:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-07-20 21:49:15,850 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 27 [2020-07-20 21:49:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:15,850 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-07-20 21:49:15,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-07-20 21:49:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:15,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:15,859 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:16,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:16,074 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-07-20 21:49:16,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:16,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228637053] [2020-07-20 21:49:16,076 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:16,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:16,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:16,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:16,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228637053] [2020-07-20 21:49:16,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:16,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:16,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173064717] [2020-07-20 21:49:16,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:16,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:16,144 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-07-20 21:49:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:16,352 INFO L93 Difference]: Finished difference Result 10892 states and 14664 transitions. [2020-07-20 21:49:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:16,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:16,378 INFO L225 Difference]: With dead ends: 10892 [2020-07-20 21:49:16,378 INFO L226 Difference]: Without dead ends: 7242 [2020-07-20 21:49:16,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 21:49:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2020-07-20 21:49:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 7240. [2020-07-20 21:49:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7240 states. [2020-07-20 21:49:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 9478 transitions. [2020-07-20 21:49:16,619 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 9478 transitions. Word has length 27 [2020-07-20 21:49:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:16,620 INFO L479 AbstractCegarLoop]: Abstraction has 7240 states and 9478 transitions. [2020-07-20 21:49:16,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 9478 transitions. [2020-07-20 21:49:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:16,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:16,633 INFO L422 BasicCegarLoop]: trace histogram [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 21:49:16,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:16,849 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash -872871122, now seen corresponding path program 1 times [2020-07-20 21:49:16,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:16,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258081181] [2020-07-20 21:49:16,851 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:16,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:16,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:16,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:16,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258081181] [2020-07-20 21:49:16,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:16,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:16,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816424526] [2020-07-20 21:49:16,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:16,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:16,903 INFO L87 Difference]: Start difference. First operand 7240 states and 9478 transitions. Second operand 3 states. [2020-07-20 21:49:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:17,019 INFO L93 Difference]: Finished difference Result 8012 states and 10760 transitions. [2020-07-20 21:49:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:17,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:17,040 INFO L225 Difference]: With dead ends: 8012 [2020-07-20 21:49:17,040 INFO L226 Difference]: Without dead ends: 8010 [2020-07-20 21:49:17,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 21:49:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2020-07-20 21:49:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 7240. [2020-07-20 21:49:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7240 states. [2020-07-20 21:49:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 9350 transitions. [2020-07-20 21:49:17,316 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 9350 transitions. Word has length 27 [2020-07-20 21:49:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:17,316 INFO L479 AbstractCegarLoop]: Abstraction has 7240 states and 9350 transitions. [2020-07-20 21:49:17,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 9350 transitions. [2020-07-20 21:49:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:49:17,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:17,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:17,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:17,540 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1994864807, now seen corresponding path program 1 times [2020-07-20 21:49:17,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:17,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927061317] [2020-07-20 21:49:17,542 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:17,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:17,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:17,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927061317] [2020-07-20 21:49:17,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:17,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:17,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678905427] [2020-07-20 21:49:17,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:17,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:17,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:17,605 INFO L87 Difference]: Start difference. First operand 7240 states and 9350 transitions. Second operand 3 states. [2020-07-20 21:49:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:17,806 INFO L93 Difference]: Finished difference Result 12108 states and 15752 transitions. [2020-07-20 21:49:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:17,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 21:49:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:17,845 INFO L225 Difference]: With dead ends: 12108 [2020-07-20 21:49:17,845 INFO L226 Difference]: Without dead ends: 12106 [2020-07-20 21:49:17,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 21:49:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2020-07-20 21:49:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 11080. [2020-07-20 21:49:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11080 states. [2020-07-20 21:49:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11080 states to 11080 states and 13958 transitions. [2020-07-20 21:49:18,221 INFO L78 Accepts]: Start accepts. Automaton has 11080 states and 13958 transitions. Word has length 28 [2020-07-20 21:49:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:18,222 INFO L479 AbstractCegarLoop]: Abstraction has 11080 states and 13958 transitions. [2020-07-20 21:49:18,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11080 states and 13958 transitions. [2020-07-20 21:49:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:49:18,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:18,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:18,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:18,464 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1408058793, now seen corresponding path program 1 times [2020-07-20 21:49:18,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:18,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307641650] [2020-07-20 21:49:18,466 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:18,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:18,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:18,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307641650] [2020-07-20 21:49:18,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:18,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:18,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242433363] [2020-07-20 21:49:18,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:18,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:18,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:18,540 INFO L87 Difference]: Start difference. First operand 11080 states and 13958 transitions. Second operand 3 states. [2020-07-20 21:49:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:18,951 INFO L93 Difference]: Finished difference Result 25164 states and 31624 transitions. [2020-07-20 21:49:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:18,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 21:49:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:18,988 INFO L225 Difference]: With dead ends: 25164 [2020-07-20 21:49:18,989 INFO L226 Difference]: Without dead ends: 14154 [2020-07-20 21:49:19,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 21:49:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14154 states. [2020-07-20 21:49:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14154 to 14152. [2020-07-20 21:49:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14152 states. [2020-07-20 21:49:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14152 states to 14152 states and 17286 transitions. [2020-07-20 21:49:19,376 INFO L78 Accepts]: Start accepts. Automaton has 14152 states and 17286 transitions. Word has length 28 [2020-07-20 21:49:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:19,376 INFO L479 AbstractCegarLoop]: Abstraction has 14152 states and 17286 transitions. [2020-07-20 21:49:19,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 14152 states and 17286 transitions. [2020-07-20 21:49:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 21:49:19,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:19,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:19,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:19,613 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1711482981, now seen corresponding path program 1 times [2020-07-20 21:49:19,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:19,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038072151] [2020-07-20 21:49:19,614 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:19,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:49:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:19,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:19,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:19,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:19,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038072151] [2020-07-20 21:49:19,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:19,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:19,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119928973] [2020-07-20 21:49:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:19,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:19,660 INFO L87 Difference]: Start difference. First operand 14152 states and 17286 transitions. Second operand 3 states. [2020-07-20 21:49:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:20,602 INFO L93 Difference]: Finished difference Result 23114 states and 28039 transitions. [2020-07-20 21:49:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:20,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 21:49:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:20,676 INFO L225 Difference]: With dead ends: 23114 [2020-07-20 21:49:20,676 INFO L226 Difference]: Without dead ends: 23112 [2020-07-20 21:49:20,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 21:49:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23112 states. [2020-07-20 21:49:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23112 to 22088. [2020-07-20 21:49:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22088 states. [2020-07-20 21:49:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22088 states to 22088 states and 26502 transitions. [2020-07-20 21:49:21,428 INFO L78 Accepts]: Start accepts. Automaton has 22088 states and 26502 transitions. Word has length 29 [2020-07-20 21:49:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:21,429 INFO L479 AbstractCegarLoop]: Abstraction has 22088 states and 26502 transitions. [2020-07-20 21:49:21,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22088 states and 26502 transitions. [2020-07-20 21:49:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 21:49:21,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:21,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:21,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:21,707 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1124676967, now seen corresponding path program 1 times [2020-07-20 21:49:21,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:21,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896623362] [2020-07-20 21:49:21,709 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:21,756 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:21,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:21,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:21,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896623362] [2020-07-20 21:49:21,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:21,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:21,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963880421] [2020-07-20 21:49:21,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:21,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:21,772 INFO L87 Difference]: Start difference. First operand 22088 states and 26502 transitions. Second operand 3 states. [2020-07-20 21:49:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:22,332 INFO L93 Difference]: Finished difference Result 49736 states and 59270 transitions. [2020-07-20 21:49:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:22,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 21:49:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:22,333 INFO L225 Difference]: With dead ends: 49736 [2020-07-20 21:49:22,333 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:49:22,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 21:49:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:49:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:49:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:49:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:49:22,414 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-20 21:49:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:22,415 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:49:22,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:49:22,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:49:22,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:22,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:49:22,747 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:49:22,747 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:22,747 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:22,748 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:49:22,749 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:49:22,749 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:49:22,749 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-07-20 21:49:22,749 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-07-20 21:49:22,750 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,750 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,750 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,752 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,752 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-07-20 21:49:22,752 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,752 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-07-20 21:49:22,752 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,753 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,753 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,753 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-07-20 21:49:22,753 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-07-20 21:49:22,753 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-07-20 21:49:22,754 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-07-20 21:49:22,754 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-07-20 21:49:22,754 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-20 21:49:22,754 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-07-20 21:49:22,755 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,755 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,755 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-07-20 21:49:22,755 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-20 21:49:22,755 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-20 21:49:22,756 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,757 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-07-20 21:49:22,757 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,757 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-20 21:49:22,757 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-07-20 21:49:22,757 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,758 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 21:49:22,758 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-20 21:49:22,758 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-07-20 21:49:22,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:22 BoogieIcfgContainer [2020-07-20 21:49:22,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:49:22,783 INFO L168 Benchmark]: Toolchain (without parser) took 15760.91 ms. Allocated memory was 142.1 MB in the beginning and 507.0 MB in the end (delta: 364.9 MB). Free memory was 99.2 MB in the beginning and 248.2 MB in the end (delta: -149.1 MB). Peak memory consumption was 215.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,784 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.50 ms. Allocated memory is still 142.1 MB. Free memory was 98.7 MB in the beginning and 88.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,786 INFO L168 Benchmark]: Boogie Preprocessor took 149.17 ms. Allocated memory was 142.1 MB in the beginning and 198.7 MB in the end (delta: 56.6 MB). Free memory was 88.0 MB in the beginning and 176.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,787 INFO L168 Benchmark]: RCFGBuilder took 448.21 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 157.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,795 INFO L168 Benchmark]: TraceAbstraction took 14875.63 ms. Allocated memory was 198.7 MB in the beginning and 507.0 MB in the end (delta: 308.3 MB). Free memory was 157.0 MB in the beginning and 248.2 MB in the end (delta: -91.3 MB). Peak memory consumption was 217.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:22,800 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.50 ms. Allocated memory is still 142.1 MB. Free memory was 98.7 MB in the beginning and 88.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.17 ms. Allocated memory was 142.1 MB in the beginning and 198.7 MB in the end (delta: 56.6 MB). Free memory was 88.0 MB in the beginning and 176.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.21 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 157.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14875.63 ms. Allocated memory was 198.7 MB in the beginning and 507.0 MB in the end (delta: 308.3 MB). Free memory was 157.0 MB in the beginning and 248.2 MB in the end (delta: -91.3 MB). Peak memory consumption was 217.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.6s, OverallIterations: 26, TraceHistogramMax: 1, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2204 SDtfs, 1061 SDslu, 1510 SDs, 0 SdLazy, 139 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 611 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22088occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 26 MinimizatonAttempts, 4120 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 637 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 611 ConstructedInterpolants, 0 QuantifiedInterpolants, 28663 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2527 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...