/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:19:31,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:19:31,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:19:31,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:19:31,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:19:31,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:19:31,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:19:31,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:19:31,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:19:31,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:19:31,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:19:31,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:19:31,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:19:31,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:19:31,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:19:31,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:19:31,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:19:31,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:19:31,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:19:31,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:19:31,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:19:31,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:19:31,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:19:31,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:19:31,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:19:31,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:19:31,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:19:31,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:19:31,959 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 20:19:31,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:19:31,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:19:32,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:19:32,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:19:32,001 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:19:32,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:19:32,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:19:32,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:19:32,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:19:32,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:19:32,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:19:32,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:19:32,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:19:32,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:19:32,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:19:32,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:19:32,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:19:32,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:19:32,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:19:32,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:19:32,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:19:32,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:32,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:19:32,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:19:32,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:19:32,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:19:32,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:32,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:19:32,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:19:32,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:19:32,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:19:32,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:19:32,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:19:32,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:19:32,376 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:19:32,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-1.c [2020-07-21 20:19:32,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da135b1f/13526d3693404769821d4c9ce1caa575/FLAG639140a77 [2020-07-21 20:19:33,006 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:19:33,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-1.c [2020-07-21 20:19:33,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da135b1f/13526d3693404769821d4c9ce1caa575/FLAG639140a77 [2020-07-21 20:19:33,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9da135b1f/13526d3693404769821d4c9ce1caa575 [2020-07-21 20:19:33,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:19:33,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:19:33,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:33,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:19:33,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:19:33,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ad3b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33, skipping insertion in model container [2020-07-21 20:19:33,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:19:33,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:19:33,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:33,589 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:19:33,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:33,635 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:19:33,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33 WrapperNode [2020-07-21 20:19:33,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:33,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:19:33,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:19:33,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:19:33,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (1/1) ... [2020-07-21 20:19:33,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:19:33,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:19:33,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:19:33,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:19:33,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (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 20:19:33,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:19:33,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:19:33,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:19:33,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:19:33,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:19:33,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:19:33,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:19:33,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:19:33,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:19:33,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:19:33,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:19:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:19:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:19:33,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:19:34,157 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:19:34,158 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:19:34,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:34 BoogieIcfgContainer [2020-07-21 20:19:34,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:19:34,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:19:34,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:19:34,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:19:34,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:19:33" (1/3) ... [2020-07-21 20:19:34,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa08f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:34, skipping insertion in model container [2020-07-21 20:19:34,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:33" (2/3) ... [2020-07-21 20:19:34,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa08f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:34, skipping insertion in model container [2020-07-21 20:19:34,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:34" (3/3) ... [2020-07-21 20:19:34,183 INFO L109 eAbstractionObserver]: Analyzing ICFG array-1.c [2020-07-21 20:19:34,193 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:19:34,200 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:19:34,214 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:19:34,237 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:19:34,237 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:19:34,237 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:19:34,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:19:34,238 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:19:34,238 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:19:34,238 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:19:34,238 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:19:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 20:19:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:19:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:34,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:34,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times [2020-07-21 20:19:34,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:34,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307867792] [2020-07-21 20:19:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:34,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:34,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:19:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:34,424 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 20:19:34,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:34,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307867792] [2020-07-21 20:19:34,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:34,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:19:34,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490659112] [2020-07-21 20:19:34,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:19:34,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:19:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:19:34,456 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 20:19:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:34,479 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-07-21 20:19:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:19:34,481 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 20:19:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:34,489 INFO L225 Difference]: With dead ends: 35 [2020-07-21 20:19:34,489 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 20:19:34,493 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 20:19:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 20:19:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 20:19:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 20:19:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 20:19:34,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-07-21 20:19:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:34,538 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 20:19:34,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:19:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 20:19:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:19:34,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:34,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:34,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:34,755 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times [2020-07-21 20:19:34,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:34,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846343483] [2020-07-21 20:19:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:34,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:19:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:19:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:34,862 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 20:19:34,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:34,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846343483] [2020-07-21 20:19:34,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:34,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:19:34,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321845664] [2020-07-21 20:19:34,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:19:34,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:19:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:19:34,868 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2020-07-21 20:19:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:34,911 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-21 20:19:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:19:34,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-21 20:19:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:34,913 INFO L225 Difference]: With dead ends: 24 [2020-07-21 20:19:34,913 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 20:19:34,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:19:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 20:19:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-07-21 20:19:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 20:19:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-07-21 20:19:34,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-07-21 20:19:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:34,926 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-07-21 20:19:34,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:19:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-07-21 20:19:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:19:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:34,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:35,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:35,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times [2020-07-21 20:19:35,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:35,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350058953] [2020-07-21 20:19:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:35,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:35,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:19:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:35,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-07-21 20:19:35,296 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,318 INFO L624 ElimStorePlain]: treesize reduction 5, result has 80.8 percent of original size [2020-07-21 20:19:35,338 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-07-21 20:19:35,339 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,347 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:35,349 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,350 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:3 [2020-07-21 20:19:35,373 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 20:19:35,377 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,381 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:35,381 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 20:19:35,396 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:19:35,427 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 20:19:35,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:35,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,592 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2020-07-21 20:19:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,603 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,624 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:35,637 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:35,639 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2020-07-21 20:19:35,641 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,644 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:35,645 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,659 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:35,660 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,663 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:35,664 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,722 INFO L624 ElimStorePlain]: treesize reduction 144, result has 23.0 percent of original size [2020-07-21 20:19:35,728 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2020-07-21 20:19:35,747 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:35,748 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 118 [2020-07-21 20:19:35,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,760 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 20:19:35,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:35,767 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2020-07-21 20:19:35,784 INFO L624 ElimStorePlain]: treesize reduction 90, result has 9.1 percent of original size [2020-07-21 20:19:35,785 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:35,793 INFO L624 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2020-07-21 20:19:35,794 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:19:35,795 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:367, output treesize:9 [2020-07-21 20:19:35,821 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 20:19:35,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350058953] [2020-07-21 20:19:35,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:35,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-07-21 20:19:35,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785611376] [2020-07-21 20:19:35,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:35,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:35,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:35,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:35,824 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2020-07-21 20:19:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:35,951 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-07-21 20:19:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:19:35,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-07-21 20:19:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:35,953 INFO L225 Difference]: With dead ends: 26 [2020-07-21 20:19:35,954 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 20:19:35,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:19:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 20:19:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-21 20:19:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 20:19:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-21 20:19:35,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-07-21 20:19:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:35,961 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-21 20:19:35,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-21 20:19:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:19:35,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:35,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:36,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:36,177 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1573562706, now seen corresponding path program 1 times [2020-07-21 20:19:36,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:36,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646058420] [2020-07-21 20:19:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:36,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:36,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:19:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:36,270 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 20:19:36,271 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,277 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:36,278 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,278 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:7 [2020-07-21 20:19:36,300 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-07-21 20:19:36,302 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,304 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:36,305 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,305 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-07-21 20:19:36,316 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:19:36,342 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 20:19:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:36,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:36,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:36,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:36,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:36,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:36,444 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2020-07-21 20:19:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:36,460 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2020-07-21 20:19:36,462 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,465 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:36,465 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,470 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:36,471 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,475 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:36,475 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2020-07-21 20:19:36,485 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:36,495 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2020-07-21 20:19:36,496 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,498 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:36,498 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:36,512 INFO L624 ElimStorePlain]: treesize reduction 25, result has 26.5 percent of original size [2020-07-21 20:19:36,513 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:19:36,513 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:203, output treesize:9 [2020-07-21 20:19:36,538 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 20:19:36,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646058420] [2020-07-21 20:19:36,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:36,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 20:19:36,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361276139] [2020-07-21 20:19:36,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:19:36,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:19:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:19:36,542 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2020-07-21 20:19:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:36,731 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-21 20:19:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:19:36,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-07-21 20:19:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:36,733 INFO L225 Difference]: With dead ends: 27 [2020-07-21 20:19:36,734 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 20:19:36,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-07-21 20:19:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 20:19:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-07-21 20:19:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 20:19:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-21 20:19:36,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-07-21 20:19:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:36,740 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-21 20:19:36,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:19:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-21 20:19:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:19:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:36,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:36,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:36,957 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:36,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2070630979, now seen corresponding path program 2 times [2020-07-21 20:19:36,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:36,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227827192] [2020-07-21 20:19:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:37,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:37,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 20:19:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:37,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-07-21 20:19:37,063 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,068 INFO L624 ElimStorePlain]: treesize reduction 35, result has 2.8 percent of original size [2020-07-21 20:19:37,069 INFO L512 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2020-07-21 20:19:37,069 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:1 [2020-07-21 20:19:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:37,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:37,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:37,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:37,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:37,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:37,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:37,283 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2020-07-21 20:19:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:37,307 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2020-07-21 20:19:37,309 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,313 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:37,314 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,332 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:37,333 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,337 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-07-21 20:19:37,337 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2020-07-21 20:19:37,348 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:37,354 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 20:19:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:37,362 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2020-07-21 20:19:37,363 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:37,365 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:37,366 INFO L544 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:39,517 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2020-07-21 20:19:39,519 INFO L624 ElimStorePlain]: treesize reduction 40, result has 40.3 percent of original size [2020-07-21 20:19:39,520 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 20:19:39,520 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:269, output treesize:27 [2020-07-21 20:19:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:39,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227827192] [2020-07-21 20:19:39,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11] total 13 [2020-07-21 20:19:39,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451734716] [2020-07-21 20:19:39,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 20:19:39,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 20:19:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-21 20:19:39,662 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 13 states. [2020-07-21 20:19:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:39,735 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-07-21 20:19:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:19:39,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-07-21 20:19:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:39,736 INFO L225 Difference]: With dead ends: 21 [2020-07-21 20:19:39,736 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:19:39,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-21 20:19:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:19:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:19:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:19:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:19:39,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-21 20:19:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:39,739 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:19:39,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 20:19:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:19:39,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:19:39,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:39,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:19:40,112 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:19:40,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:19:40,112 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:19:40,112 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:19:40,112 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:19:40,113 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:19:40,113 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:19:40,113 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 29) the Hoare annotation is: true [2020-07-21 20:19:40,113 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= main_~menor~0 (select (select |#memory_int| |main_~#array~0.base|) |main_~#array~0.offset|)) (<= main_~menor~0 |main_#t~mem5|)) [2020-07-21 20:19:40,113 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-21 20:19:40,113 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 29) no Hoare annotation was computed. [2020-07-21 20:19:40,114 INFO L268 CegarLoopResult]: For program point L22(lines 22 23) no Hoare annotation was computed. [2020-07-21 20:19:40,114 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 24) no Hoare annotation was computed. [2020-07-21 20:19:40,114 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 24) the Hoare annotation is: (let ((.cse0 (= 1 main_~SIZE~0))) (or (and (<= main_~menor~0 (select (select |#memory_int| |main_~#array~0.base|) |main_~#array~0.offset|)) .cse0 (= 1 main_~j~0)) (and .cse0 (= 0 main_~j~0)))) [2020-07-21 20:19:40,114 INFO L268 CegarLoopResult]: For program point L19-4(lines 19 24) no Hoare annotation was computed. [2020-07-21 20:19:40,115 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 29) no Hoare annotation was computed. [2020-07-21 20:19:40,117 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 20:19:40,117 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:19:40,118 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 20:19:40,118 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:19:40,118 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 20:19:40,119 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:19:40,133 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 20:19:40,142 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 20:19:40,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:19:40 BoogieIcfgContainer [2020-07-21 20:19:40,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:19:40,156 INFO L168 Benchmark]: Toolchain (without parser) took 6835.21 ms. Allocated memory was 145.2 MB in the beginning and 244.8 MB in the end (delta: 99.6 MB). Free memory was 103.9 MB in the beginning and 180.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,158 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 145.2 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,160 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.77 ms. Allocated memory is still 145.2 MB. Free memory was 103.5 MB in the beginning and 93.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,168 INFO L168 Benchmark]: Boogie Preprocessor took 127.80 ms. Allocated memory was 145.2 MB in the beginning and 204.5 MB in the end (delta: 59.2 MB). Free memory was 93.1 MB in the beginning and 182.5 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,169 INFO L168 Benchmark]: RCFGBuilder took 397.42 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 167.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,172 INFO L168 Benchmark]: TraceAbstraction took 5977.49 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 167.1 MB in the beginning and 180.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,184 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 145.2 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.77 ms. Allocated memory is still 145.2 MB. Free memory was 103.5 MB in the beginning and 93.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.80 ms. Allocated memory was 145.2 MB in the beginning and 204.5 MB in the end (delta: 59.2 MB). Free memory was 93.1 MB in the beginning and 182.5 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.42 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 167.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5977.49 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 167.1 MB in the beginning and 180.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * 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: 19]: Loop Invariant [2020-07-21 20:19:40,197 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 20:19:40,198 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((menor <= unknown-#memory_int-unknown[array][array] && 1 == SIZE) && 1 == j) || (1 == SIZE && 0 == j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 21 SDslu, 171 SDs, 0 SdLazy, 159 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 38 HoareAnnotationTreeSize, 11 FomulaSimplifications, 43 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 36 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 72 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 8401 SizeOfPredicates, 27 NumberOfNonLiveVariables, 299 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 4/14 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...