/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/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:52:41,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:52:41,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:52:41,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:52:41,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:52:41,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:52:41,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:52:41,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:52:41,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:52:41,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:52:41,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:52:41,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:52:41,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:52:41,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:52:41,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:52:41,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:52:41,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:52:41,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:52:41,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:52:41,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:52:41,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:52:41,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:52:41,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:52:41,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:52:41,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:52:41,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:52:41,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:52:41,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:52:41,877 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 01:52:41,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:52:41,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:52:41,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:52:41,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:52:41,921 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:52:41,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:52:41,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:52:41,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:52:41,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:52:41,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:52:41,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:52:41,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:52:41,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:52:41,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:52:41,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:52:41,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:52:41,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:52:41,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:52:41,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:52:41,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:52:41,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:52:41,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:52:41,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:52:41,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:52:41,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:52:41,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:52:41,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:41,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:52:41,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:52:41,926 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 01:52:42,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:52:42,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:52:42,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:52:42,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:52:42,345 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:52:42,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 01:52:42,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8a662d/af9a7ebee7e946f5bc7dcac88874440b/FLAG9e4ca1c02 [2020-07-21 01:52:42,920 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:52:42,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 01:52:42,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8a662d/af9a7ebee7e946f5bc7dcac88874440b/FLAG9e4ca1c02 [2020-07-21 01:52:43,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8a662d/af9a7ebee7e946f5bc7dcac88874440b [2020-07-21 01:52:43,291 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:52:43,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:52:43,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:52:43,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:52:43,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:52:43,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143da84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43, skipping insertion in model container [2020-07-21 01:52:43,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:52:43,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:52:43,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:52:43,536 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:52:43,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:52:43,567 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:52:43,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43 WrapperNode [2020-07-21 01:52:43,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:52:43,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:52:43,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:52:43,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:52:43,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (1/1) ... [2020-07-21 01:52:43,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:52:43,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:52:43,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:52:43,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:52:43,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (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 01:52:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:52:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:52:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:52:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:52:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:52:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:52:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:52:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:52:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:52:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:52:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:52:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:52:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:52:44,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:52:44,223 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:52:44,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:52:44 BoogieIcfgContainer [2020-07-21 01:52:44,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:52:44,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:52:44,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:52:44,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:52:44,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:52:43" (1/3) ... [2020-07-21 01:52:44,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1306be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:52:44, skipping insertion in model container [2020-07-21 01:52:44,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:52:43" (2/3) ... [2020-07-21 01:52:44,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1306be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:52:44, skipping insertion in model container [2020-07-21 01:52:44,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:52:44" (3/3) ... [2020-07-21 01:52:44,234 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-21 01:52:44,247 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:52:44,255 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:52:44,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:52:44,299 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:52:44,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:52:44,300 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:52:44,300 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:52:44,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:52:44,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:52:44,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:52:44,301 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:52:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 01:52:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 01:52:44,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:44,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:44,330 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-21 01:52:44,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:44,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517464369] [2020-07-21 01:52:44,345 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 01:52:44,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:44,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:52:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:44,451 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 01:52:44,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:44,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517464369] [2020-07-21 01:52:44,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:44,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:52:44,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704844799] [2020-07-21 01:52:44,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:52:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:44,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:52:44,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:52:44,478 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 01:52:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:44,504 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-21 01:52:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:52:44,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 01:52:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:44,515 INFO L225 Difference]: With dead ends: 35 [2020-07-21 01:52:44,515 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:52:44,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:52:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:52:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:52:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:52:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 01:52:44,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-21 01:52:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:44,566 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 01:52:44,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:52:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 01:52:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:52:44,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:44,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:44,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:44,784 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-21 01:52:44,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:44,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315447534] [2020-07-21 01:52:44,786 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 01:52:44,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:52:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:44,851 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 01:52:44,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:44,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315447534] [2020-07-21 01:52:44,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:44,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:52:44,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656577348] [2020-07-21 01:52:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:52:44,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:52:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:52:44,856 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 01:52:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:44,871 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-21 01:52:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:52:44,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 01:52:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:44,873 INFO L225 Difference]: With dead ends: 24 [2020-07-21 01:52:44,873 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 01:52:44,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 01:52:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 01:52:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 01:52:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 01:52:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 01:52:44,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-21 01:52:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:44,880 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 01:52:44,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:52:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 01:52:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:52:44,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:44,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:45,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:45,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-21 01:52:45,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:45,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368540763] [2020-07-21 01:52:45,086 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 01:52:45,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:52:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:45,202 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 01:52:45,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:45,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368540763] [2020-07-21 01:52:45,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:45,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:52:45,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081317286] [2020-07-21 01:52:45,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:52:45,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:52:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:52:45,207 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 01:52:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:45,263 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-21 01:52:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:52:45,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 01:52:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:45,266 INFO L225 Difference]: With dead ends: 23 [2020-07-21 01:52:45,266 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 01:52:45,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 01:52:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 01:52:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 01:52:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 01:52:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-21 01:52:45,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-21 01:52:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:45,275 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-21 01:52:45,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:52:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-21 01:52:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:52:45,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:45,277 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:45,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:45,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-21 01:52:45,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:45,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077267618] [2020-07-21 01:52:45,495 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 01:52:45,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:45,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:45,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:52:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:45,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:52:45,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077267618] [2020-07-21 01:52:45,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:52:45,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:52:45,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077458110] [2020-07-21 01:52:45,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:52:45,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:52:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:52:45,570 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-21 01:52:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:45,623 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 01:52:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:52:45,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 01:52:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:45,627 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:52:45,628 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 01:52:45,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:52:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 01:52:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-21 01:52:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:52:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 01:52:45,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-21 01:52:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:45,635 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 01:52:45,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:52:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 01:52:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:52:45,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:45,637 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:45,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:45,847 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-21 01:52:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:45,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871314318] [2020-07-21 01:52:45,850 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 01:52:45,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:52:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:52:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:46,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:52:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:46,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871314318] [2020-07-21 01:52:46,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:46,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 01:52:46,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759208374] [2020-07-21 01:52:46,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:52:46,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:52:46,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:52:46,164 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-21 01:52:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:46,332 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-21 01:52:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:52:46,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 01:52:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:46,338 INFO L225 Difference]: With dead ends: 26 [2020-07-21 01:52:46,339 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 01:52:46,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:52:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 01:52:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 01:52:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:52:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 01:52:46,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-21 01:52:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:46,355 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 01:52:46,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:52:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 01:52:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:52:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:46,357 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:46,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:46,558 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-21 01:52:46,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:46,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794592961] [2020-07-21 01:52:46,559 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 01:52:46,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:52:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:52:46,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:46,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 01:52:46,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794592961] [2020-07-21 01:52:46,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 01:52:46,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-21 01:52:46,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133774407] [2020-07-21 01:52:46,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:52:46,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:52:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:52:46,714 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 01:52:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:52:46,741 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 01:52:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:52:46,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 01:52:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:52:46,747 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:52:46,748 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 01:52:46,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:52:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 01:52:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 01:52:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:52:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 01:52:46,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 19 [2020-07-21 01:52:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:52:46,764 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 01:52:46,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:52:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 01:52:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:52:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:52:46,765 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:52:46,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:52:46,979 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:52:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:52:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-07-21 01:52:46,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:52:46,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065502243] [2020-07-21 01:52:46,982 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 01:52:47,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:52:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:52:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 01:52:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:52:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:47,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:52:47,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:52:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:52:47,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065502243] [2020-07-21 01:52:47,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:52:47,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 01:52:47,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876731235] [2020-07-21 01:52:47,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:52:47,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:52:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:52:47,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:52:47,508 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2020-07-21 01:52:49,741 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-21 01:53:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:53:04,389 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 01:53:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:53:04,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-21 01:53:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:53:04,392 INFO L225 Difference]: With dead ends: 39 [2020-07-21 01:53:04,392 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 01:53:04,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2020-07-21 01:53:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 01:53:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 01:53:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 01:53:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-21 01:53:04,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2020-07-21 01:53:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:53:04,400 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-21 01:53:04,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:53:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-21 01:53:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:53:04,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:53:04,402 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:53:04,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:53:04,603 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:53:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:53:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 3 times [2020-07-21 01:53:04,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:53:04,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137563057] [2020-07-21 01:53:04,606 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 01:53:04,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:53:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:53:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 01:53:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:53:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:53:04,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:53:04,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:53:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:53:08,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137563057] [2020-07-21 01:53:08,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:53:08,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-21 01:53:08,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196390888] [2020-07-21 01:53:08,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 01:53:08,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:53:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 01:53:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=544, Unknown=1, NotChecked=0, Total=650 [2020-07-21 01:53:08,366 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-07-21 01:53:21,930 WARN L193 SmtUtils]: Spent 10.32 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 01:53:42,627 WARN L193 SmtUtils]: Spent 14.07 s on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 01:54:04,349 WARN L193 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 01:54:25,936 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 01:54:51,320 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 01:55:12,593 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 01:57:18,934 WARN L193 SmtUtils]: Spent 10.63 s on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 01:57:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:57:19,036 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-07-21 01:57:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 01:57:19,037 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-07-21 01:57:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:57:19,039 INFO L225 Difference]: With dead ends: 63 [2020-07-21 01:57:19,039 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 01:57:19,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 165.0s TimeCoverageRelationStatistics Valid=240, Invalid=1119, Unknown=47, NotChecked=0, Total=1406 [2020-07-21 01:57:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 01:57:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-21 01:57:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 01:57:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-21 01:57:19,051 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 28 [2020-07-21 01:57:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:57:19,052 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-21 01:57:19,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 01:57:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-21 01:57:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 01:57:19,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:57:19,054 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:57:19,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:57:19,270 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:57:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:57:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1188694230, now seen corresponding path program 4 times [2020-07-21 01:57:19,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:57:19,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005485757] [2020-07-21 01:57:19,271 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 01:57:19,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:57:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:57:19,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 01:57:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:57:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:57:20,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:57:20,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:57:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 184 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:57:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005485757] [2020-07-21 01:57:49,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:57:49,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2020-07-21 01:57:49,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309131569] [2020-07-21 01:57:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 01:57:49,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:57:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 01:57:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2094, Unknown=11, NotChecked=0, Total=2450 [2020-07-21 01:57:49,782 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 50 states. [2020-07-21 01:58:08,904 WARN L193 SmtUtils]: Spent 17.64 s on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-07-21 01:58:11,460 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 18 [2020-07-21 01:58:13,960 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296)) (= (mod (+ c_main_~a~0 9) 4294967296) (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287) 18) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 8) 4294967296) (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288) 16) 4294967296)) (= (mod (+ c_main_~a~0 7) 4294967296) (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289) 14) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296)) (= (mod (+ c_main_~a~0 10) 4294967296) (mod (+ (* c_main_~j~0 10) c_main_~b~0 (* c_main_~i~0 4294967286) 20) 4294967296))) is different from false [2020-07-21 01:59:32,298 WARN L193 SmtUtils]: Spent 43.23 s on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 02:00:53,208 WARN L193 SmtUtils]: Spent 40.28 s on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 02:01:01,297 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287)) 4294967296) (mod (+ c_main_~a~0 9) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:02:05,656 WARN L193 SmtUtils]: Spent 30.71 s on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 02:02:13,730 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:02:15,748 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 7) 4294967296) (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289) 14) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296))) is different from false [2020-07-21 02:02:17,780 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:03:19,880 WARN L193 SmtUtils]: Spent 20.83 s on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 02:03:32,196 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296) (mod (+ c_main_~a~0 6) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:03:34,275 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296))) is different from false [2020-07-21 02:03:36,313 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:04:27,298 WARN L193 SmtUtils]: Spent 12.03 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 02:04:43,793 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 02:05:28,144 WARN L193 SmtUtils]: Spent 8.22 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 02:06:28,448 WARN L193 SmtUtils]: Spent 9.18 s on a formula simplification that was a NOOP. DAG size: 42