/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/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:52:26,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:52:26,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:52:26,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:52:26,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:52:26,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:52:26,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:52:26,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:52:26,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:52:26,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:52:26,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:52:26,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:52:26,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:52:26,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:52:26,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:52:26,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:52:26,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:52:26,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:52:26,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:52:26,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:52:26,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:52:26,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:52:26,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:52:26,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:52:26,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:52:26,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:52:26,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:52:26,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:52:26,849 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 01:52:26,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:52:26,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:52:26,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:52:26,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:52:26,868 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:52:26,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:52:26,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:52:26,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:52:26,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:52:26,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:52:26,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:52:26,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:52:26,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:52:26,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:52:26,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:52:26,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:52:26,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:52:26,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:52:26,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:52:26,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:52:26,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:52:26,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:26,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:52:26,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:52:26,873 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 01:52:27,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:52:27,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:52:27,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:52:27,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:52:27,252 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:52:27,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 01:52:27,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e8eecfc9/509c6c3bdad14b35b83927a6887833ed/FLAG45e62aecf [2020-07-21 01:52:27,877 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:52:27,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 01:52:27,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e8eecfc9/509c6c3bdad14b35b83927a6887833ed/FLAG45e62aecf [2020-07-21 01:52:28,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e8eecfc9/509c6c3bdad14b35b83927a6887833ed [2020-07-21 01:52:28,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:52:28,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:52:28,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:52:28,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:52:28,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:52:28,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138f3c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28, skipping insertion in model container [2020-07-21 01:52:28,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:52:28,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:52:28,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:52:28,451 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:52:28,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:52:28,485 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:52:28,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28 WrapperNode [2020-07-21 01:52:28,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:52:28,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:52:28,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:52:28,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:52:28,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (1/1) ... [2020-07-21 01:52:28,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:52:28,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:52:28,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:52:28,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:52:28,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (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 01:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:52:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:52:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:52:28,871 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:52:28,872 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:52:28,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:52:28 BoogieIcfgContainer [2020-07-21 01:52:28,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:52:28,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:52:28,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:52:28,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:52:28,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:52:28" (1/3) ... [2020-07-21 01:52:28,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c3d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:52:28, skipping insertion in model container [2020-07-21 01:52:28,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:28" (2/3) ... [2020-07-21 01:52:28,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c3d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:52:28, skipping insertion in model container [2020-07-21 01:52:28,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:52:28" (3/3) ... [2020-07-21 01:52:28,885 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-21 01:52:28,896 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:52:28,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:52:28,920 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:52:28,947 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:52:28,947 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:52:28,947 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:52:28,948 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:52:28,948 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:52:28,948 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:52:28,948 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:52:28,948 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:52:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 01:52:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:52:28,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:28,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:28,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-21 01:52:28,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:28,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924918698] [2020-07-21 01:52:28,996 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 01:52:29,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:52:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:29,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:29,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924918698] [2020-07-21 01:52:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:29,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:52:29,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421962687] [2020-07-21 01:52:29,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:52:29,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:52:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:52:29,172 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 01:52:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:29,199 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-21 01:52:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:52:29,201 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 01:52:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:29,211 INFO L225 Difference]: With dead ends: 37 [2020-07-21 01:52:29,211 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:52:29,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 01:52:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:52:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:52:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:52:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-21 01:52:29,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-21 01:52:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:29,263 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-21 01:52:29,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:52:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-21 01:52:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:52:29,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:29,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:29,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:29,477 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-21 01:52:29,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:29,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413759963] [2020-07-21 01:52:29,481 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 01:52:29,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:52:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:29,565 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 01:52:29,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:29,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413759963] [2020-07-21 01:52:29,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:29,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:52:29,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885487851] [2020-07-21 01:52:29,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:52:29,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:52:29,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:52:29,573 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-21 01:52:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:29,605 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 01:52:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:52:29,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 01:52:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:29,608 INFO L225 Difference]: With dead ends: 20 [2020-07-21 01:52:29,608 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:52:29,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 01:52:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:52:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:52:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:52:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 01:52:29,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-21 01:52:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:29,625 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 01:52:29,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:52:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 01:52:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:52:29,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:29,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:29,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:29,844 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-21 01:52:29,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:29,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747188944] [2020-07-21 01:52:29,848 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 01:52:29,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:52:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:29,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:29,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747188944] [2020-07-21 01:52:29,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:29,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:52:29,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185315629] [2020-07-21 01:52:29,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:52:29,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:52:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:52:29,906 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 01:52:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:29,920 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-21 01:52:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:52:29,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 01:52:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:29,922 INFO L225 Difference]: With dead ends: 25 [2020-07-21 01:52:29,922 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 01:52:29,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 01:52:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 01:52:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 01:52:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 01:52:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 01:52:29,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-21 01:52:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:29,929 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 01:52:29,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:52:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 01:52:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:52:29,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:29,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:30,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:30,132 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-21 01:52:30,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:30,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327214865] [2020-07-21 01:52:30,134 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 01:52:30,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:52:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:30,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:30,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327214865] [2020-07-21 01:52:30,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:30,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 01:52:30,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655303980] [2020-07-21 01:52:30,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:52:30,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:30,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:52:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:52:30,302 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2020-07-21 01:52:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:30,364 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-07-21 01:52:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:52:30,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-07-21 01:52:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:30,365 INFO L225 Difference]: With dead ends: 27 [2020-07-21 01:52:30,365 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:52:30,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:52:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:52:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:52:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:52:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 01:52:30,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-07-21 01:52:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:30,372 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 01:52:30,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:52:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 01:52:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:52:30,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:30,374 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:30,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:30,588 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash -395814058, now seen corresponding path program 2 times [2020-07-21 01:52:30,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:30,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739832676] [2020-07-21 01:52:30,591 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 01:52:30,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:52:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:30,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:30,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739832676] [2020-07-21 01:52:30,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:30,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 01:52:30,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097252690] [2020-07-21 01:52:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:52:30,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:52:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:52:30,831 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 12 states. [2020-07-21 01:52:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:31,045 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-07-21 01:52:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 01:52:31,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-21 01:52:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:31,047 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:52:31,047 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 01:52:31,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:52:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 01:52:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 01:52:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 01:52:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-07-21 01:52:31,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-07-21 01:52:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:31,055 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-07-21 01:52:31,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:52:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-07-21 01:52:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:52:31,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:31,056 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:31,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:31,273 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash -751554218, now seen corresponding path program 3 times [2020-07-21 01:52:31,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:31,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627307047] [2020-07-21 01:52:31,275 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 01:52:31,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:31,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:52:31,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 01:52:31,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 01:52:31,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627307047] [2020-07-21 01:52:31,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:31,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 01:52:31,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217332723] [2020-07-21 01:52:31,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:52:31,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:31,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:52:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:52:31,353 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-07-21 01:52:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:31,391 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-21 01:52:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:52:31,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-21 01:52:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:31,393 INFO L225 Difference]: With dead ends: 39 [2020-07-21 01:52:31,393 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 01:52:31,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:52:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 01:52:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 01:52:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 01:52:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 01:52:31,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2020-07-21 01:52:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:31,402 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 01:52:31,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:52:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 01:52:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 01:52:31,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:31,404 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:31,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:31,619 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 4 times [2020-07-21 01:52:31,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:31,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796732161] [2020-07-21 01:52:31,621 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 01:52:31,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:31,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:31,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:52:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:31,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:32,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796732161] [2020-07-21 01:52:32,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:32,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 01:52:32,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707154460] [2020-07-21 01:52:32,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 01:52:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 01:52:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-07-21 01:52:32,042 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 20 states. [2020-07-21 01:52:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:32,642 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 01:52:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 01:52:32,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-21 01:52:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:32,644 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:52:32,644 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:52:32,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=685, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 01:52:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:52:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 01:52:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:52:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 01:52:32,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2020-07-21 01:52:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:32,654 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 01:52:32,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 01:52:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 01:52:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 01:52:32,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:32,656 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:32,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:32,870 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 5 times [2020-07-21 01:52:32,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:32,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835052749] [2020-07-21 01:52:32,872 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 01:52:32,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:52:32,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 01:52:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:33,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:33,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835052749] [2020-07-21 01:52:33,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:33,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 01:52:33,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408594053] [2020-07-21 01:52:33,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 01:52:33,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 01:52:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 01:52:33,930 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 36 states. [2020-07-21 01:52:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:35,846 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-07-21 01:52:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 01:52:35,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-07-21 01:52:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:35,848 INFO L225 Difference]: With dead ends: 78 [2020-07-21 01:52:35,848 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 01:52:35,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1637, Invalid=2653, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 01:52:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 01:52:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 01:52:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 01:52:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-21 01:52:35,861 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-07-21 01:52:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:35,862 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-21 01:52:35,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 01:52:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-21 01:52:35,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 01:52:35,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:35,864 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:36,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:36,077 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1471630604, now seen corresponding path program 6 times [2020-07-21 01:52:36,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:36,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139815093] [2020-07-21 01:52:36,080 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 01:52:36,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:36,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:36,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 01:52:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:37,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:39,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139815093] [2020-07-21 01:52:39,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:39,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 01:52:39,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892248757] [2020-07-21 01:52:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 01:52:39,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 01:52:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3332, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 01:52:39,564 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 68 states. [2020-07-21 01:52:42,666 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2020-07-21 01:52:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:47,938 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-21 01:52:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-21 01:52:47,942 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 57 [2020-07-21 01:52:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:47,944 INFO L225 Difference]: With dead ends: 110 [2020-07-21 01:52:47,944 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 01:52:47,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=6341, Invalid=10429, Unknown=0, NotChecked=0, Total=16770 [2020-07-21 01:52:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 01:52:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-21 01:52:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 01:52:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-07-21 01:52:47,965 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 57 [2020-07-21 01:52:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:47,966 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-07-21 01:52:47,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 01:52:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-07-21 01:52:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-21 01:52:47,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:47,970 INFO L422 BasicCegarLoop]: trace histogram [63, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:48,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:48,185 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash -374211316, now seen corresponding path program 7 times [2020-07-21 01:52:48,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:48,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123533929] [2020-07-21 01:52:48,187 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 01:52:48,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:52:48,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 01:52:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:52:51,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:53:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 01:53:01,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123533929] [2020-07-21 01:53:01,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:53:01,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 01:53:01,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548975992] [2020-07-21 01:53:01,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 01:53:01,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:53:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 01:53:01,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4404, Invalid=12888, Unknown=0, NotChecked=0, Total=17292 [2020-07-21 01:53:01,602 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 132 states. [2020-07-21 01:53:01,850 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 10 [2020-07-21 01:53:02,128 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 12 [2020-07-21 01:53:02,353 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 01:53:02,567 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 13 [2020-07-21 01:53:02,804 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 13 [2020-07-21 01:53:03,032 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 13 [2020-07-21 01:53:03,264 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 13 [2020-07-21 01:53:03,505 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 13 [2020-07-21 01:53:03,741 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 13 [2020-07-21 01:53:03,967 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 13 [2020-07-21 01:53:04,200 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 13 [2020-07-21 01:53:04,440 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 13 [2020-07-21 01:53:04,675 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 13 [2020-07-21 01:53:04,911 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 13 [2020-07-21 01:53:05,146 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 13 [2020-07-21 01:53:05,396 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 13 [2020-07-21 01:53:05,642 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 13 [2020-07-21 01:53:05,885 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 01:53:06,124 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 13 [2020-07-21 01:53:06,359 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 13 [2020-07-21 01:53:06,610 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 13 [2020-07-21 01:53:06,849 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 13 [2020-07-21 01:53:07,102 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 13 [2020-07-21 01:53:07,375 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 13 [2020-07-21 01:53:07,618 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 13 [2020-07-21 01:53:08,371 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 13 [2020-07-21 01:53:16,837 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 16 [2020-07-21 01:53:17,471 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-07-21 01:53:18,106 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 9 [2020-07-21 01:53:18,753 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 9 [2020-07-21 01:53:19,391 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-07-21 01:53:20,033 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 9 [2020-07-21 01:53:20,665 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 9 [2020-07-21 01:53:21,307 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-07-21 01:53:21,932 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-07-21 01:53:22,583 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 9 [2020-07-21 01:53:23,210 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-07-21 01:53:23,828 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 9 [2020-07-21 01:53:24,459 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 9 [2020-07-21 01:53:25,076 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-07-21 01:53:25,700 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 9 [2020-07-21 01:53:26,331 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 9 [2020-07-21 01:53:26,985 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-07-21 01:53:27,614 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 9 [2020-07-21 01:53:28,229 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 9 [2020-07-21 01:53:28,850 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-07-21 01:53:30,667 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-07-21 01:53:32,482 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-07-21 01:53:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:53:47,637 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2020-07-21 01:53:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-21 01:53:47,640 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 89 [2020-07-21 01:53:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:53:47,642 INFO L225 Difference]: With dead ends: 167 [2020-07-21 01:53:47,642 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 01:53:47,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11163 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=23060, Invalid=39690, Unknown=0, NotChecked=0, Total=62750 [2020-07-21 01:53:47,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 01:53:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 01:53:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 01:53:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-07-21 01:53:47,668 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 89 [2020-07-21 01:53:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:53:47,669 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-07-21 01:53:47,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-21 01:53:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-07-21 01:53:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-21 01:53:47,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:53:47,675 INFO L422 BasicCegarLoop]: trace histogram [120, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:53:47,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:47,876 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:53:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:53:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1451426972, now seen corresponding path program 8 times [2020-07-21 01:53:47,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:53:47,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852068816] [2020-07-21 01:53:47,878 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 01:53:47,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:53:47,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:53:47,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:53:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:53:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:48,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:53:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:48,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852068816] [2020-07-21 01:53:48,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:53:48,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 01:53:48,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641602699] [2020-07-21 01:53:48,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 01:53:48,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:53:48,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 01:53:48,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:53:48,243 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-07-21 01:53:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:53:48,347 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2020-07-21 01:53:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 01:53:48,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-07-21 01:53:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:53:48,352 INFO L225 Difference]: With dead ends: 176 [2020-07-21 01:53:48,352 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 01:53:48,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:53:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 01:53:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-21 01:53:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 01:53:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-07-21 01:53:48,373 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 146 [2020-07-21 01:53:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:53:48,373 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-07-21 01:53:48,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 01:53:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-07-21 01:53:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-21 01:53:48,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:53:48,376 INFO L422 BasicCegarLoop]: trace histogram [120, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:53:48,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:48,590 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:53:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:53:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash -699301936, now seen corresponding path program 9 times [2020-07-21 01:53:48,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:53:48,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324828895] [2020-07-21 01:53:48,593 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 01:53:48,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:53:48,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:53:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:53:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:53:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:48,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:53:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:49,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324828895] [2020-07-21 01:53:49,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:53:49,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 01:53:49,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570419542] [2020-07-21 01:53:49,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 01:53:49,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:53:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 01:53:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:53:49,454 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2020-07-21 01:53:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:53:49,680 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2020-07-21 01:53:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 01:53:49,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-07-21 01:53:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:53:49,686 INFO L225 Difference]: With dead ends: 224 [2020-07-21 01:53:49,687 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 01:53:49,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 01:53:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 01:53:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-07-21 01:53:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 01:53:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-07-21 01:53:49,724 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 170 [2020-07-21 01:53:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:53:49,725 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-07-21 01:53:49,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 01:53:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-07-21 01:53:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 01:53:49,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:53:49,729 INFO L422 BasicCegarLoop]: trace histogram [120, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:53:49,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:49,944 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:53:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:53:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -377226072, now seen corresponding path program 10 times [2020-07-21 01:53:49,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:53:49,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41588824] [2020-07-21 01:53:49,946 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 01:53:50,048 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:53:50,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:53:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 01:53:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:53:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:50,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:53:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:52,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41588824] [2020-07-21 01:53:52,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:53:52,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 01:53:52,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564601083] [2020-07-21 01:53:52,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 01:53:52,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:53:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 01:53:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 01:53:52,679 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 48 states. [2020-07-21 01:53:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:53:53,116 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2020-07-21 01:53:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 01:53:53,118 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 218 [2020-07-21 01:53:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:53:53,121 INFO L225 Difference]: With dead ends: 320 [2020-07-21 01:53:53,121 INFO L226 Difference]: Without dead ends: 315 [2020-07-21 01:53:53,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 01:53:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-21 01:53:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-07-21 01:53:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-21 01:53:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-07-21 01:53:53,141 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 218 [2020-07-21 01:53:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:53:53,142 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-07-21 01:53:53,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 01:53:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-07-21 01:53:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-21 01:53:53,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:53:53,148 INFO L422 BasicCegarLoop]: trace histogram [120, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:53:53,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:53,363 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:53:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:53:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1906391464, now seen corresponding path program 11 times [2020-07-21 01:53:53,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:53:53,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555824978] [2020-07-21 01:53:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:53,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:53:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:53:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 01:53:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:53:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:53:56,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:54:03,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555824978] [2020-07-21 01:54:03,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:03,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 01:54:03,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174787724] [2020-07-21 01:54:03,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 01:54:03,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 01:54:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 01:54:03,566 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 96 states. [2020-07-21 01:54:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:05,095 INFO L93 Difference]: Finished difference Result 512 states and 747 transitions. [2020-07-21 01:54:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 01:54:05,097 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 314 [2020-07-21 01:54:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:05,101 INFO L225 Difference]: With dead ends: 512 [2020-07-21 01:54:05,101 INFO L226 Difference]: Without dead ends: 507 [2020-07-21 01:54:05,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 01:54:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-21 01:54:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2020-07-21 01:54:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-07-21 01:54:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 695 transitions. [2020-07-21 01:54:05,124 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 695 transitions. Word has length 314 [2020-07-21 01:54:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:05,124 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 695 transitions. [2020-07-21 01:54:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 01:54:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 695 transitions. [2020-07-21 01:54:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 01:54:05,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:05,129 INFO L422 BasicCegarLoop]: trace histogram [120, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:05,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:05,338 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1953208760, now seen corresponding path program 12 times [2020-07-21 01:54:05,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416830962] [2020-07-21 01:54:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:05,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:05,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:05,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 01:54:05,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:54:16,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:54:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 01:54:28,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416830962] [2020-07-21 01:54:28,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:54:28,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 103 [2020-07-21 01:54:28,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226373794] [2020-07-21 01:54:28,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 01:54:28,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:28,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 01:54:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 01:54:28,206 INFO L87 Difference]: Start difference. First operand 507 states and 695 transitions. Second operand 103 states. [2020-07-21 01:54:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:29,913 INFO L93 Difference]: Finished difference Result 540 states and 748 transitions. [2020-07-21 01:54:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 01:54:29,916 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 506 [2020-07-21 01:54:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:29,922 INFO L225 Difference]: With dead ends: 540 [2020-07-21 01:54:29,922 INFO L226 Difference]: Without dead ends: 535 [2020-07-21 01:54:29,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 821 SyntacticMatches, 89 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 01:54:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-07-21 01:54:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-07-21 01:54:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-21 01:54:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2020-07-21 01:54:29,957 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 506 [2020-07-21 01:54:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:29,958 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2020-07-21 01:54:29,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 01:54:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2020-07-21 01:54:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-21 01:54:29,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:54:29,965 INFO L422 BasicCegarLoop]: trace histogram [120, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:54:30,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:30,181 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:54:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:54:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1254004406, now seen corresponding path program 13 times [2020-07-21 01:54:30,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:54:30,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393692310] [2020-07-21 01:54:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:30,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:54:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:54:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:54:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:54:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 39561 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 39360 trivial. 0 not checked. [2020-07-21 01:54:30,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:54:30,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393692310] [2020-07-21 01:54:30,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:54:30,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:54:30,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034357664] [2020-07-21 01:54:30,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:54:30,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:54:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:54:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:54:30,540 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand 5 states. [2020-07-21 01:54:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:54:30,602 INFO L93 Difference]: Finished difference Result 940 states and 1344 transitions. [2020-07-21 01:54:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:54:30,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 534 [2020-07-21 01:54:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:54:30,603 INFO L225 Difference]: With dead ends: 940 [2020-07-21 01:54:30,603 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:54:30,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 530 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 01:54:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:54:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:54:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:54:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:54:30,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 534 [2020-07-21 01:54:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:54:30,610 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:54:30,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:54:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:54:30,611 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:54:30,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:54:30,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:54:31,051 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 3 [2020-07-21 01:54:31,267 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 7 [2020-07-21 01:54:31,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:54:31,466 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:54:31,466 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:54:31,466 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:54:31,466 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:54:31,466 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:54:31,466 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:54:31,467 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:54:31,467 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:54:31,467 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:54:31,467 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-21 01:54:31,468 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-21 01:54:31,468 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-21 01:54:31,468 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 01:54:31,468 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 01:54:31,468 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) (* 62 main_~i~0))) (= 4 main_~k~0)) [2020-07-21 01:54:31,468 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-21 01:54:31,468 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-21 01:54:31,469 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 01:54:31,469 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 01:54:31,469 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:54:31,469 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 01:54:31,469 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 01:54:31,469 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 01:54:31,470 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 01:54:31,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:54:31 BoogieIcfgContainer [2020-07-21 01:54:31,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:54:31,500 INFO L168 Benchmark]: Toolchain (without parser) took 123277.01 ms. Allocated memory was 138.4 MB in the beginning and 559.4 MB in the end (delta: 421.0 MB). Free memory was 102.2 MB in the beginning and 272.2 MB in the end (delta: -170.0 MB). Peak memory consumption was 251.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,504 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.13 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,505 INFO L168 Benchmark]: Boogie Preprocessor took 35.71 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,507 INFO L168 Benchmark]: RCFGBuilder took 352.62 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.5 MB in the beginning and 168.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,508 INFO L168 Benchmark]: TraceAbstraction took 122621.32 ms. Allocated memory was 201.3 MB in the beginning and 559.4 MB in the end (delta: 358.1 MB). Free memory was 168.5 MB in the beginning and 272.2 MB in the end (delta: -103.7 MB). Peak memory consumption was 254.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:54:31,515 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.13 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.71 ms. Allocated memory is still 138.4 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.62 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.5 MB in the beginning and 168.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 122621.32 ms. Allocated memory was 201.3 MB in the beginning and 559.4 MB in the end (delta: 358.1 MB). Free memory was 168.5 MB in the beginning and 272.2 MB in the end (delta: -103.7 MB). Peak memory consumption was 254.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 62 * i) || 4 == k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 121.8s, OverallIterations: 16, TraceHistogramMax: 120, AutomataDifference: 61.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 2098 SDslu, 2884 SDs, 0 SdLazy, 1273 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4039 GetRequests, 3171 SyntacticMatches, 89 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 108.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 25 PreInvPairs, 450 NumberOfFragments, 33 HoareAnnotationTreeSize, 25 FomulaSimplifications, 5777 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 55.2s InterpolantComputationTime, 2195 NumberOfCodeBlocks, 2118 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3794 ConstructedInterpolants, 0 QuantifiedInterpolants, 3109882 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4894 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 113142/205374 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...