/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 BIGGEST_EQUIVALENCE_CLASS --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/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:42:01,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:42:01,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:42:01,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:42:01,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:42:01,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:42:01,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:42:01,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:42:01,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:42:01,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:42:01,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:42:01,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:42:01,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:42:01,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:42:01,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:42:01,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:42:01,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:42:01,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:42:01,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:42:01,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:42:01,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:42:01,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:42:01,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:42:01,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:42:01,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:42:01,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:42:01,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:42:01,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:42:01,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:42:01,285 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:42:01,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:42:01,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:42:01,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:42:01,291 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:42:01,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:42:01,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:42:01,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:42:01,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:42:01,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:42:01,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:42:01,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:42:01,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:42:01,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:42:01,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:42:01,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:42:01,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:42:01,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:42:01,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:42:01,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:42:01,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:42:01,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:42:01,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:42:01,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:42:01,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:42:01,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:42:01,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:01,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:42:01,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:42:01,303 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:42:01,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:42:01,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:42:01,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:42:01,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:42:01,829 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:42:01,830 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 01:42:01,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3f4fdf5b/07579100dacb4daeae5aa7700704eff4/FLAG1008986a3 [2020-07-21 01:42:02,723 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:42:02,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 01:42:02,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3f4fdf5b/07579100dacb4daeae5aa7700704eff4/FLAG1008986a3 [2020-07-21 01:42:02,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3f4fdf5b/07579100dacb4daeae5aa7700704eff4 [2020-07-21 01:42:02,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:42:02,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:42:02,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:02,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:42:03,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:42:03,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:02" (1/1) ... [2020-07-21 01:42:03,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740fa54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03, skipping insertion in model container [2020-07-21 01:42:03,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:02" (1/1) ... [2020-07-21 01:42:03,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:42:03,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:42:03,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:03,463 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:42:03,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:03,690 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:42:03,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03 WrapperNode [2020-07-21 01:42:03,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:03,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:42:03,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:42:03,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:42:03,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... [2020-07-21 01:42:03,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:42:03,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:42:03,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:42:03,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:42:03,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:42:03,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:42:03,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:42:03,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:42:03,883 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-21 01:42:03,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:42:03,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-21 01:42:03,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:42:03,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:42:03,885 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-21 01:42:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-21 01:42:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:42:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 01:42:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 01:42:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:42:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:42:03,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:42:03,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:42:04,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:42:04,698 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-21 01:42:04,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:04 BoogieIcfgContainer [2020-07-21 01:42:04,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:42:04,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:42:04,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:42:04,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:42:04,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:02" (1/3) ... [2020-07-21 01:42:04,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23504cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:04, skipping insertion in model container [2020-07-21 01:42:04,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:03" (2/3) ... [2020-07-21 01:42:04,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23504cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:04, skipping insertion in model container [2020-07-21 01:42:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:04" (3/3) ... [2020-07-21 01:42:04,721 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-21 01:42:04,740 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:42:04,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:42:04,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:42:04,814 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:42:04,815 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:42:04,815 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:42:04,815 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:42:04,815 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:42:04,815 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:42:04,816 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:42:04,816 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:42:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-21 01:42:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 01:42:04,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:04,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:04,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-21 01:42:04,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:04,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964008703] [2020-07-21 01:42:04,879 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 [2020-07-21 01:42:05,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:05,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:42:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:05,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:05,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964008703] [2020-07-21 01:42:05,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:05,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:42:05,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677170486] [2020-07-21 01:42:05,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:42:05,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:42:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:42:05,112 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2020-07-21 01:42:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:05,170 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2020-07-21 01:42:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:42:05,173 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 01:42:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:05,192 INFO L225 Difference]: With dead ends: 122 [2020-07-21 01:42:05,193 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 01:42:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:42:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 01:42:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 01:42:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:42:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 01:42:05,274 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-21 01:42:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:05,275 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 01:42:05,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:42:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 01:42:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 01:42:05,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:05,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:05,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:05,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-21 01:42:05,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:05,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937570600] [2020-07-21 01:42:05,491 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 [2020-07-21 01:42:05,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:05,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:42:05,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:05,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:05,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937570600] [2020-07-21 01:42:05,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:05,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:42:05,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129702767] [2020-07-21 01:42:05,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:42:05,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:42:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:42:05,733 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-07-21 01:42:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:05,816 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-07-21 01:42:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:42:05,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 01:42:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:05,819 INFO L225 Difference]: With dead ends: 38 [2020-07-21 01:42:05,819 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 01:42:05,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:42:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 01:42:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-07-21 01:42:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 01:42:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-21 01:42:05,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-21 01:42:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:05,834 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-21 01:42:05,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:42:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-21 01:42:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:42:05,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:05,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:06,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:06,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-21 01:42:06,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:06,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486472657] [2020-07-21 01:42:06,057 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 [2020-07-21 01:42:06,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:42:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:06,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:06,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486472657] [2020-07-21 01:42:06,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:06,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 01:42:06,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126362862] [2020-07-21 01:42:06,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:42:06,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:06,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:42:06,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:06,308 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-07-21 01:42:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:06,460 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 01:42:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:42:06,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-21 01:42:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:06,464 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:42:06,464 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:42:06,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:42:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:42:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 01:42:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:42:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 01:42:06,476 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-21 01:42:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:06,477 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 01:42:06,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:42:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 01:42:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:42:06,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:06,479 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:06,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:06,694 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1296658810, now seen corresponding path program 2 times [2020-07-21 01:42:06,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:06,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116237427] [2020-07-21 01:42:06,696 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 [2020-07-21 01:42:06,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:42:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:42:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:42:06,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:06,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116237427] [2020-07-21 01:42:06,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:06,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:42:06,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724816037] [2020-07-21 01:42:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:42:06,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:42:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:42:06,839 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 4 states. [2020-07-21 01:42:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:06,947 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-07-21 01:42:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:42:06,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-21 01:42:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:06,952 INFO L225 Difference]: With dead ends: 87 [2020-07-21 01:42:06,952 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 01:42:06,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:42:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 01:42:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-21 01:42:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:42:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 01:42:06,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 28 [2020-07-21 01:42:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:06,974 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 01:42:06,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:42:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 01:42:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:42:06,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:06,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:07,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:07,178 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:07,179 INFO L82 PathProgramCache]: Analyzing trace with hash -479010360, now seen corresponding path program 1 times [2020-07-21 01:42:07,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:07,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847906590] [2020-07-21 01:42:07,181 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 [2020-07-21 01:42:07,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:07,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:42:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:07,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:07,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847906590] [2020-07-21 01:42:07,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:07,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 01:42:07,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526074743] [2020-07-21 01:42:07,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:42:07,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:42:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:07,607 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-21 01:42:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:07,849 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-07-21 01:42:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:42:07,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-07-21 01:42:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:07,851 INFO L225 Difference]: With dead ends: 71 [2020-07-21 01:42:07,852 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 01:42:07,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-21 01:42:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 01:42:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 01:42:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 01:42:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-21 01:42:07,867 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 28 [2020-07-21 01:42:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:07,868 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-21 01:42:07,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:42:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-21 01:42:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 01:42:07,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:07,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:08,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:08,079 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 2 times [2020-07-21 01:42:08,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:08,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197322112] [2020-07-21 01:42:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:08,208 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:08,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:42:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:08,254 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:42:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 01:42:08,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:08,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197322112] [2020-07-21 01:42:08,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:08,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:42:08,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142389955] [2020-07-21 01:42:08,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:42:08,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:42:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:42:08,309 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-07-21 01:42:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:08,427 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-07-21 01:42:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:42:08,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-21 01:42:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:08,430 INFO L225 Difference]: With dead ends: 76 [2020-07-21 01:42:08,431 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 01:42:08,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:42:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 01:42:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-21 01:42:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 01:42:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-21 01:42:08,449 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2020-07-21 01:42:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:08,449 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-21 01:42:08,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:42:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-21 01:42:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 01:42:08,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:08,453 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:08,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:08,669 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 1 times [2020-07-21 01:42:08,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:08,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033748345] [2020-07-21 01:42:08,673 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 [2020-07-21 01:42:08,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:42:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 01:42:08,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 01:42:08,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033748345] [2020-07-21 01:42:08,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:08,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 01:42:08,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293678640] [2020-07-21 01:42:08,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:42:08,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:42:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:08,980 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-21 01:42:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:09,156 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-21 01:42:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:42:09,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 01:42:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:09,159 INFO L225 Difference]: With dead ends: 168 [2020-07-21 01:42:09,160 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 01:42:09,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:42:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 01:42:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-21 01:42:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 01:42:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-21 01:42:09,177 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-21 01:42:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:09,178 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-21 01:42:09,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:42:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-21 01:42:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 01:42:09,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:09,181 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:09,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:09,395 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 2 times [2020-07-21 01:42:09,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:09,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132676527] [2020-07-21 01:42:09,398 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 [2020-07-21 01:42:09,596 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:09,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:42:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:09,625 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:42:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 01:42:09,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:09,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 01:42:09,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132676527] [2020-07-21 01:42:09,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:09,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 01:42:09,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072415825] [2020-07-21 01:42:09,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:42:09,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:42:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:09,727 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-07-21 01:42:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:09,922 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2020-07-21 01:42:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:42:09,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 01:42:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:09,927 INFO L225 Difference]: With dead ends: 167 [2020-07-21 01:42:09,928 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 01:42:09,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:42:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 01:42:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-07-21 01:42:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 01:42:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-07-21 01:42:09,995 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 69 [2020-07-21 01:42:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:09,996 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-07-21 01:42:09,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:42:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-07-21 01:42:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 01:42:10,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:10,010 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:10,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:10,212 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 419958136, now seen corresponding path program 3 times [2020-07-21 01:42:10,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:10,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478458547] [2020-07-21 01:42:10,215 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 [2020-07-21 01:42:10,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:42:10,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 01:42:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1019 proven. 297 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-21 01:42:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1007 proven. 297 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 01:42:10,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478458547] [2020-07-21 01:42:10,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:10,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 01:42:10,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156148479] [2020-07-21 01:42:10,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:42:10,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:42:10,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:42:10,801 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 11 states. [2020-07-21 01:42:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:11,159 INFO L93 Difference]: Finished difference Result 303 states and 358 transitions. [2020-07-21 01:42:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:42:11,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-07-21 01:42:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:11,172 INFO L225 Difference]: With dead ends: 303 [2020-07-21 01:42:11,172 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 01:42:11,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 01:42:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-07-21 01:42:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 01:42:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-07-21 01:42:11,201 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 168 [2020-07-21 01:42:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:11,202 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-07-21 01:42:11,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:42:11,202 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-07-21 01:42:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 01:42:11,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:11,206 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:11,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:11,421 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 4 times [2020-07-21 01:42:11,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:11,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796066191] [2020-07-21 01:42:11,423 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 [2020-07-21 01:42:11,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:11,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 01:42:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 838 proven. 768 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-21 01:42:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 828 proven. 768 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 01:42:12,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796066191] [2020-07-21 01:42:12,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:12,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-21 01:42:12,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25855771] [2020-07-21 01:42:12,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:42:12,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:42:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:12,168 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 14 states. [2020-07-21 01:42:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:12,712 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-07-21 01:42:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 01:42:12,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 01:42:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:12,720 INFO L225 Difference]: With dead ends: 268 [2020-07-21 01:42:12,721 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 01:42:12,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-07-21 01:42:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 01:42:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-07-21 01:42:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 01:42:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2020-07-21 01:42:12,750 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 168 [2020-07-21 01:42:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:12,752 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2020-07-21 01:42:12,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:42:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2020-07-21 01:42:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 01:42:12,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:12,765 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:12,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:12,967 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 5 times [2020-07-21 01:42:12,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:12,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273444582] [2020-07-21 01:42:12,970 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 [2020-07-21 01:42:14,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 01:42:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 01:42:14,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 01:42:14,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273444582] [2020-07-21 01:42:14,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:14,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-07-21 01:42:14,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324280666] [2020-07-21 01:42:14,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 01:42:14,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 01:42:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-07-21 01:42:14,550 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand 17 states. [2020-07-21 01:42:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:15,517 INFO L93 Difference]: Finished difference Result 271 states and 313 transitions. [2020-07-21 01:42:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 01:42:15,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-07-21 01:42:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:15,525 INFO L225 Difference]: With dead ends: 271 [2020-07-21 01:42:15,525 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 01:42:15,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-07-21 01:42:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 01:42:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2020-07-21 01:42:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 01:42:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2020-07-21 01:42:15,552 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 168 [2020-07-21 01:42:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:15,555 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2020-07-21 01:42:15,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 01:42:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2020-07-21 01:42:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 01:42:15,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:15,561 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 25, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:15,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:15,776 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2135886202, now seen corresponding path program 6 times [2020-07-21 01:42:15,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:15,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196119835] [2020-07-21 01:42:15,778 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 [2020-07-21 01:42:17,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:42:17,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:17,254 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:42:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 01:42:17,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:17,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 01:42:17,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196119835] [2020-07-21 01:42:17,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:17,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 01:42:17,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655111246] [2020-07-21 01:42:17,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:42:17,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:42:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:17,471 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand 14 states. [2020-07-21 01:42:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:17,886 INFO L93 Difference]: Finished difference Result 345 states and 414 transitions. [2020-07-21 01:42:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 01:42:17,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 01:42:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:17,891 INFO L225 Difference]: With dead ends: 345 [2020-07-21 01:42:17,892 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 01:42:17,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-21 01:42:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 01:42:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-07-21 01:42:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-21 01:42:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 410 transitions. [2020-07-21 01:42:17,926 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 410 transitions. Word has length 168 [2020-07-21 01:42:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:17,928 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 410 transitions. [2020-07-21 01:42:17,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:42:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 410 transitions. [2020-07-21 01:42:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 01:42:17,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:17,940 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 61, 11, 11, 11, 11, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:18,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:18,142 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1434461414, now seen corresponding path program 7 times [2020-07-21 01:42:18,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:18,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395593148] [2020-07-21 01:42:18,145 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 [2020-07-21 01:42:21,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:42:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 7345 proven. 0 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2020-07-21 01:42:22,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:22,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395593148] [2020-07-21 01:42:22,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:22,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 01:42:22,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093942906] [2020-07-21 01:42:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:42:22,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:42:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:42:22,132 INFO L87 Difference]: Start difference. First operand 341 states and 410 transitions. Second operand 9 states. [2020-07-21 01:42:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:22,344 INFO L93 Difference]: Finished difference Result 345 states and 413 transitions. [2020-07-21 01:42:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:42:22,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2020-07-21 01:42:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:22,349 INFO L225 Difference]: With dead ends: 345 [2020-07-21 01:42:22,349 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:42:22,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:42:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:42:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:42:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:42:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:42:22,353 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2020-07-21 01:42:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:22,354 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:42:22,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:42:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:42:22,355 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:42:22,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:22,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:42:22,938 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-21 01:42:23,150 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-07-21 01:42:23,299 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 01:42:23,511 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-21 01:42:23,564 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-21 01:42:23,564 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-21 01:42:23,565 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-21 01:42:23,565 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-21 01:42:23,565 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-21 01:42:23,565 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-21 01:42:23,565 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-21 01:42:23,565 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-21 01:42:23,565 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-21 01:42:23,565 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-21 01:42:23,566 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-21 01:42:23,566 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-21 01:42:23,566 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-21 01:42:23,566 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-21 01:42:23,566 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-21 01:42:23,566 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-21 01:42:23,566 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-21 01:42:23,567 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-21 01:42:23,568 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-21 01:42:23,569 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-21 01:42:23,569 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-21 01:42:23,569 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-21 01:42:23,569 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 01:42:23,569 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-21 01:42:23,569 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-21 01:42:23,569 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-21 01:42:23,570 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:42:23,571 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:42:23,572 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:42:23,572 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-21 01:42:23,572 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-21 01:42:23,575 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-21 01:42:23,575 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-21 01:42:23,576 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-21 01:42:23,576 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:42:23,576 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:42:23,576 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:42:23,576 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:42:23,576 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-21 01:42:23,576 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-21 01:42:23,577 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-21 01:42:23,577 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-21 01:42:23,578 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 4 main_~i~0)) (and .cse0 .cse1 (= 0 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (< main_~i~0 47) (<= 6 main_~i~0)))) [2020-07-21 01:42:23,578 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-21 01:42:23,578 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-21 01:42:23,578 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 01:42:23,578 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 01:42:23,578 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-21 01:42:23,579 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-21 01:42:23,579 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 01:42:23,579 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 01:42:23,579 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 01:42:23,579 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 01:42:23,579 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 01:42:23,580 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 01:42:23,580 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 01:42:23,580 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 01:42:23,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:23 BoogieIcfgContainer [2020-07-21 01:42:23,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:42:23,653 INFO L168 Benchmark]: Toolchain (without parser) took 20659.96 ms. Allocated memory was 141.0 MB in the beginning and 320.9 MB in the end (delta: 179.8 MB). Free memory was 105.7 MB in the beginning and 100.1 MB in the end (delta: 5.6 MB). Peak memory consumption was 185.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,661 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 141.0 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.92 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 105.3 MB in the beginning and 181.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,669 INFO L168 Benchmark]: Boogie Preprocessor took 91.39 ms. Allocated memory is still 203.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,670 INFO L168 Benchmark]: RCFGBuilder took 921.69 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 152.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,676 INFO L168 Benchmark]: TraceAbstraction took 18943.92 ms. Allocated memory was 203.9 MB in the beginning and 320.9 MB in the end (delta: 116.9 MB). Free memory was 151.3 MB in the beginning and 100.1 MB in the end (delta: 51.2 MB). Peak memory consumption was 168.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:23,681 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 141.0 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 693.92 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 105.3 MB in the beginning and 181.7 MB in the end (delta: -76.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.39 ms. Allocated memory is still 203.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 921.69 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 152.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18943.92 ms. Allocated memory was 203.9 MB in the beginning and 320.9 MB in the end (delta: 116.9 MB). Free memory was 151.3 MB in the beginning and 100.1 MB in the end (delta: 51.2 MB). Peak memory consumption was 168.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: ((((((n <= 5 && 5 <= n) && 0 == i) || (((n <= 5 && i <= 4) && 5 <= n) && 4 <= i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n) - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: (((((((n <= 5 && 5 <= n) && 4 == i) || ((n <= 5 && 5 <= n) && 0 == i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i < 47) && 6 <= i) - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.7s, OverallIterations: 13, TraceHistogramMax: 66, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 342 SDtfs, 295 SDslu, 1105 SDs, 0 SdLazy, 1956 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2175 GetRequests, 2053 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=341occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 227 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 55 PreInvPairs, 121 NumberOfFragments, 238 HoareAnnotationTreeSize, 55 FomulaSimplifications, 2209 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 21 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1308 NumberOfCodeBlocks, 1053 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 2141 ConstructedInterpolants, 0 QuantifiedInterpolants, 1138863 SizeOfPredicates, 24 NumberOfNonLiveVariables, 2767 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 18097/26797 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...