/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:58:32,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:58:32,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:58:32,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:58:32,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:58:32,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:58:32,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:58:32,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:58:32,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:58:32,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:58:32,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:58:32,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:58:32,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:58:32,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:58:32,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:58:32,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:58:32,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:58:32,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:58:32,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:58:32,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:58:32,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:58:32,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:58:32,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:58:32,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:58:32,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:58:32,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:58:32,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:58:32,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:58:32,737 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 16:58:32,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:58:32,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:58:32,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:58:32,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:58:32,761 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:58:32,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:58:32,761 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:58:32,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:58:32,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:58:32,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:58:32,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:58:32,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:58:32,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:58:32,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:58:32,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:58:32,764 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:58:32,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:58:32,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:58:32,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:58:32,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:58:32,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:58:32,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:58:32,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:58:32,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:58:32,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:58:32,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:58:32,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:32,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:58:32,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:58:32,767 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:58:33,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:58:33,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:58:33,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:58:33,065 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:58:33,065 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:58:33,066 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 16:58:33,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7168b8b/dc1bf989a64348368254bb269a97d18f/FLAGfb76da112 [2020-07-21 16:58:33,562 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:58:33,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 16:58:33,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7168b8b/dc1bf989a64348368254bb269a97d18f/FLAGfb76da112 [2020-07-21 16:58:33,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7168b8b/dc1bf989a64348368254bb269a97d18f [2020-07-21 16:58:34,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:58:34,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:58:34,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:58:34,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:58:34,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:58:34,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:58:33" (1/1) ... [2020-07-21 16:58:34,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f65fbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34, skipping insertion in model container [2020-07-21 16:58:34,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:58:33" (1/1) ... [2020-07-21 16:58:34,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:58:34,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:58:34,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:58:34,248 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:58:34,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:58:34,277 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:58:34,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34 WrapperNode [2020-07-21 16:58:34,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:58:34,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:58:34,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:58:34,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:58:34,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (1/1) ... [2020-07-21 16:58:34,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:58:34,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:58:34,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:58:34,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:58:34,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (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 16:58:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:58:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:58:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:58:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:58:34,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:58:34,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:58:34,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:58:34,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:58:34,653 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:58:34,653 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:58:34,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:58:34 BoogieIcfgContainer [2020-07-21 16:58:34,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:58:34,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:58:34,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:58:34,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:58:34,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:58:33" (1/3) ... [2020-07-21 16:58:34,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56219783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:58:34, skipping insertion in model container [2020-07-21 16:58:34,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:34" (2/3) ... [2020-07-21 16:58:34,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56219783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:58:34, skipping insertion in model container [2020-07-21 16:58:34,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:58:34" (3/3) ... [2020-07-21 16:58:34,669 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-21 16:58:34,681 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:58:34,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:58:34,704 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:58:34,729 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:58:34,729 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:58:34,729 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:58:34,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:58:34,730 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:58:34,730 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:58:34,730 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:58:34,731 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:58:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 16:58:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:58:34,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:34,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:34,759 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-21 16:58:34,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:34,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452293372] [2020-07-21 16:58:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:34,841 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:58:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:34,870 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 16:58:34,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:58:34,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452293372] [2020-07-21 16:58:34,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:58:34,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:58:34,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474733711] [2020-07-21 16:58:34,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:58:34,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:34,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:58:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:58:34,899 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 16:58:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:34,931 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-21 16:58:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:58:34,933 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 16:58:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:34,945 INFO L225 Difference]: With dead ends: 35 [2020-07-21 16:58:34,945 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 16:58:34,950 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 16:58:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 16:58:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 16:58:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 16:58:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 16:58:34,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-21 16:58:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:34,992 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 16:58:34,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:58:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 16:58:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:58:34,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:34,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:35,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,204 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:35,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-21 16:58:35,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:35,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433320796] [2020-07-21 16:58:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:58:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:35,273 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 16:58:35,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:58:35,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433320796] [2020-07-21 16:58:35,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:58:35,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:58:35,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433852961] [2020-07-21 16:58:35,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:58:35,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:58:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:58:35,278 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 16:58:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:35,291 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-21 16:58:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:58:35,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 16:58:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:35,296 INFO L225 Difference]: With dead ends: 24 [2020-07-21 16:58:35,296 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 16:58:35,297 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 16:58:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 16:58:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 16:58:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 16:58:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 16:58:35,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-21 16:58:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:35,307 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 16:58:35,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:58:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 16:58:35,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:58:35,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:35,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:35,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,526 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-21 16:58:35,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:35,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081317286] [2020-07-21 16:58:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:58:35,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:35,616 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 16:58:35,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:58:35,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081317286] [2020-07-21 16:58:35,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:58:35,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:58:35,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444361464] [2020-07-21 16:58:35,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:58:35,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:35,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:58:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:58:35,620 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 16:58:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:35,657 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-21 16:58:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:58:35,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 16:58:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:35,658 INFO L225 Difference]: With dead ends: 23 [2020-07-21 16:58:35,658 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 16:58:35,659 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 16:58:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 16:58:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 16:58:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 16:58:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-21 16:58:35,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-21 16:58:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:35,665 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-21 16:58:35,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:58:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-21 16:58:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:58:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:35,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:35,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-21 16:58:35,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:35,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494604437] [2020-07-21 16:58:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:35,911 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:58:35,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:58:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:35,933 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 16:58:35,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:58:35,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494604437] [2020-07-21 16:58:35,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:58:35,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:58:35,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063216876] [2020-07-21 16:58:35,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:58:35,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:58:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:58:35,936 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-21 16:58:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:35,981 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 16:58:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:58:35,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 16:58:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:35,985 INFO L225 Difference]: With dead ends: 31 [2020-07-21 16:58:35,986 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 16:58:35,986 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 16:58:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 16:58:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-21 16:58:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:58:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 16:58:35,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-21 16:58:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:35,998 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 16:58:35,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:58:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 16:58:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:58:36,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:36,001 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:36,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:36,215 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:36,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-21 16:58:36,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:36,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266676555] [2020-07-21 16:58:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:36,248 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:58:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:36,320 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 16:58:36,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:58:36,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:58:36,415 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 16:58:36,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266676555] [2020-07-21 16:58:36,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:58:36,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:58:36,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672536824] [2020-07-21 16:58:36,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:58:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:58:36,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:58:36,419 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-21 16:58:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:36,506 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-21 16:58:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:58:36,506 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 16:58:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:36,507 INFO L225 Difference]: With dead ends: 26 [2020-07-21 16:58:36,507 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 16:58:36,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:58:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 16:58:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 16:58:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 16:58:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 16:58:36,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-21 16:58:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:36,513 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 16:58:36,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:58:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 16:58:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:58:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:36,514 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:36,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:36,727 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-21 16:58:36,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:36,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116964748] [2020-07-21 16:58:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:58:36,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:58:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:58:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:36,810 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 16:58:36,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:58:36,850 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 16:58:36,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116964748] [2020-07-21 16:58:36,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 16:58:36,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-21 16:58:36,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216102125] [2020-07-21 16:58:36,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:58:36,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:58:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:58:36,859 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 16:58:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:36,875 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 16:58:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:58:36,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 16:58:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:36,878 INFO L225 Difference]: With dead ends: 29 [2020-07-21 16:58:36,878 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 16:58:36,878 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 16:58:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 16:58:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 16:58:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 16:58:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 16:58:36,883 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 19 [2020-07-21 16:58:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:36,884 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 16:58:36,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:58:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 16:58:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:58:36,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:36,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:37,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:37,100 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-07-21 16:58:37,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:37,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028874481] [2020-07-21 16:58:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:58:37,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 16:58:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:37,238 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 16:58:37,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:58:37,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:58:37,430 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 16:58:37,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028874481] [2020-07-21 16:58:37,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:58:37,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 16:58:37,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519025653] [2020-07-21 16:58:37,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:58:37,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:58:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:58:37,433 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2020-07-21 16:58:39,605 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-21 16:58:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:54,236 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 16:58:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:58:54,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-21 16:58:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:54,237 INFO L225 Difference]: With dead ends: 39 [2020-07-21 16:58:54,238 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 16:58:54,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2020-07-21 16:58:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 16:58:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 16:58:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 16:58:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-21 16:58:54,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2020-07-21 16:58:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:54,244 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-21 16:58:54,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:58:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-21 16:58:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:58:54,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:54,245 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:54,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:54,446 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 3 times [2020-07-21 16:58:54,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:54,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785611376] [2020-07-21 16:58:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:58:54,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 16:58:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:54,763 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 16:58:54,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:58:54,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:58:56,468 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 16:58:56,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785611376] [2020-07-21 16:58:56,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:58:56,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-21 16:58:56,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423553094] [2020-07-21 16:58:56,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 16:58:56,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 16:58:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-07-21 16:58:56,470 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-07-21 16:59:03,111 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-07-21 16:59:14,207 WARN L193 SmtUtils]: Spent 8.77 s on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2020-07-21 16:59:27,846 WARN L193 SmtUtils]: Spent 10.27 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:59:48,616 WARN L193 SmtUtils]: Spent 16.54 s on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-07-21 17:00:11,290 WARN L193 SmtUtils]: Spent 8.26 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 17:00:33,850 WARN L193 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 17:01:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:03,103 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 17:01:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 17:01:03,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-07-21 17:01:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:03,124 INFO L225 Difference]: With dead ends: 39 [2020-07-21 17:01:03,124 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 17:01:03,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 95.4s TimeCoverageRelationStatistics Valid=175, Invalid=871, Unknown=10, NotChecked=0, Total=1056 [2020-07-21 17:01:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 17:01:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 17:01:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 17:01:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 17:01:03,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-21 17:01:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:03,127 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 17:01:03,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 17:01:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 17:01:03,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 17:01:03,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:03,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 17:01:28,906 WARN L193 SmtUtils]: Spent 25.45 s on a formula simplification. DAG size of input: 125 DAG size of output: 21 [2020-07-21 17:01:28,910 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 17:01:28,910 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:01:28,910 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:01:28,910 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 17:01:28,911 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 17:01:28,911 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-07-21 17:01:28,912 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-07-21 17:01:28,913 INFO L268 CegarLoopResult]: For program point L24-2(lines 13 38) no Hoare annotation was computed. [2020-07-21 17:01:28,913 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (or (and (= 1 main_~b~0) (= 1 main_~a~0)) (and (= (mod main_~a~0 4294967296) (mod main_~b~0 4294967296)) (= 0 (mod main_~i~0 2))) (and (= 0 main_~a~0) (= 0 main_~b~0))) [2020-07-21 17:01:28,913 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 17:01:28,913 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 17:01:28,913 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 17:01:28,913 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 17:01:28,914 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 17:01:28,914 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 17:01:28,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:01:28 BoogieIcfgContainer [2020-07-21 17:01:28,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 17:01:28,922 INFO L168 Benchmark]: Toolchain (without parser) took 174916.54 ms. Allocated memory was 145.2 MB in the beginning and 246.4 MB in the end (delta: 101.2 MB). Free memory was 101.5 MB in the beginning and 206.0 MB in the end (delta: -104.5 MB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,923 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.15 ms. Allocated memory is still 145.2 MB. Free memory was 101.1 MB in the beginning and 91.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,929 INFO L168 Benchmark]: Boogie Preprocessor took 115.81 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 181.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,929 INFO L168 Benchmark]: RCFGBuilder took 262.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 167.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,935 INFO L168 Benchmark]: TraceAbstraction took 174260.75 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 167.3 MB in the beginning and 206.0 MB in the end (delta: -38.8 MB). Peak memory consumption was 113.8 MB. Max. memory is 7.1 GB. [2020-07-21 17:01:28,943 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.15 ms. Allocated memory is still 145.2 MB. Free memory was 101.1 MB in the beginning and 91.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.81 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 181.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 167.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 174260.75 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 167.3 MB in the beginning and 206.0 MB in the end (delta: -38.8 MB). Peak memory consumption was 113.8 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 148.6s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 143.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 127 SDtfs, 58 SDslu, 419 SDs, 0 SdLazy, 294 SolverSat, 17 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 42.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 102.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 17 PreInvPairs, 25 NumberOfFragments, 33 HoareAnnotationTreeSize, 17 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 197 FormulaSimplificationTreeSizeReductionInter, 25.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 136 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 206 ConstructedInterpolants, 0 QuantifiedInterpolants, 24994 SizeOfPredicates, 13 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 13/114 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...