/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_FUNCTIONS --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/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:56:48,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:48,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:48,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:48,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:48,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:48,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:48,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:48,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:48,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:48,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:48,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:48,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:48,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:48,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:48,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:48,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:48,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:48,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:48,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:48,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:48,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:48,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:48,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:48,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:56:48,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:48,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:48,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:48,263 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 12:56:48,285 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:48,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:48,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:48,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:48,287 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:48,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:48,288 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:48,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:48,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:48,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:48,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:48,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:48,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:48,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:48,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:48,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:48,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:48,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:48,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:48,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:48,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:48,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:48,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:48,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:48,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:48,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:48,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:48,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:48,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:48,293 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_FUNCTIONS 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 12:56:48,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:48,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:48,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:48,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:48,619 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:48,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 12:56:48,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b78870/8f2861d450a241f0906d72077a46fcd6/FLAGfa6345be5 [2020-07-21 12:56:49,078 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:49,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 12:56:49,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b78870/8f2861d450a241f0906d72077a46fcd6/FLAGfa6345be5 [2020-07-21 12:56:49,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b78870/8f2861d450a241f0906d72077a46fcd6 [2020-07-21 12:56:49,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:49,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:49,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:49,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:49,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:49,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125eb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49, skipping insertion in model container [2020-07-21 12:56:49,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:49,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:49,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:49,740 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:49,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:49,769 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:49,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49 WrapperNode [2020-07-21 12:56:49,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:49,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:49,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:49,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:49,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (1/1) ... [2020-07-21 12:56:49,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:49,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:49,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:49,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:49,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (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 12:56:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 12:56:49,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 12:56:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:50,117 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:50,118 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:50,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:50 BoogieIcfgContainer [2020-07-21 12:56:50,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:50,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:50,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:50,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:50,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:49" (1/3) ... [2020-07-21 12:56:50,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca5040a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:50, skipping insertion in model container [2020-07-21 12:56:50,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:49" (2/3) ... [2020-07-21 12:56:50,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca5040a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:50, skipping insertion in model container [2020-07-21 12:56:50,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:50" (3/3) ... [2020-07-21 12:56:50,129 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-21 12:56:50,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:50,147 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:50,162 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:50,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:50,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:50,189 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:50,189 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:50,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:50,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:50,190 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:50,190 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 12:56:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:56:50,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:50,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:50,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 12:56:50,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:50,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450666356] [2020-07-21 12:56:50,280 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 12:56:50,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:50,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:50,440 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 12:56:50,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:50,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450666356] [2020-07-21 12:56:50,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:50,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:50,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128879505] [2020-07-21 12:56:50,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:50,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:50,460 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 12:56:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:50,564 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 12:56:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:50,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 12:56:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:50,577 INFO L225 Difference]: With dead ends: 36 [2020-07-21 12:56:50,577 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 12:56:50,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 12:56:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 12:56:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 12:56:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:56:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 12:56:50,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 12:56:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:50,628 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 12:56:50,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 12:56:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:50,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:50,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:50,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:50,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:50,846 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 12:56:50,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:50,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938455372] [2020-07-21 12:56:50,847 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 12:56:50,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:56:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:50,904 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 12:56:50,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:50,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938455372] [2020-07-21 12:56:50,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:50,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:56:50,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835874099] [2020-07-21 12:56:50,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:56:50,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:56:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:56:50,909 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-21 12:56:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:50,976 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 12:56:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:56:50,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 12:56:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:50,978 INFO L225 Difference]: With dead ends: 28 [2020-07-21 12:56:50,978 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 12:56:50,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 12:56:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 12:56:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 12:56:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:56:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 12:56:50,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 12:56:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:50,988 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 12:56:50,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:56:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 12:56:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:56:50,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:50,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:51,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:51,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 12:56:51,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:51,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496461746] [2020-07-21 12:56:51,209 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 12:56:51,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:51,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:56:51,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:51,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:51,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:51,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496461746] [2020-07-21 12:56:51,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:51,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-21 12:56:51,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584675751] [2020-07-21 12:56:51,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:56:51,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:51,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:56:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:56:51,528 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2020-07-21 12:56:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:51,652 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-07-21 12:56:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:51,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 12:56:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:51,656 INFO L225 Difference]: With dead ends: 40 [2020-07-21 12:56:51,656 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 12:56:51,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 12:56:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-21 12:56:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 12:56:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2020-07-21 12:56:51,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 27 [2020-07-21 12:56:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:51,668 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2020-07-21 12:56:51,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:56:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-07-21 12:56:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 12:56:51,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:51,671 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:51,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:51,885 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:51,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 1 times [2020-07-21 12:56:51,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:51,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411523585] [2020-07-21 12:56:51,888 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 12:56:51,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:51,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:56:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-07-21 12:56:51,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:52,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 12:56:52,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411523585] [2020-07-21 12:56:52,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:52,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2020-07-21 12:56:52,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525594034] [2020-07-21 12:56:52,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:56:52,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:56:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:56:52,331 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2020-07-21 12:56:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:52,517 INFO L93 Difference]: Finished difference Result 58 states and 115 transitions. [2020-07-21 12:56:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:56:52,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-07-21 12:56:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:52,521 INFO L225 Difference]: With dead ends: 58 [2020-07-21 12:56:52,521 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 12:56:52,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:56:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 12:56:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-07-21 12:56:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 12:56:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 59 transitions. [2020-07-21 12:56:52,538 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 59 transitions. Word has length 55 [2020-07-21 12:56:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:52,538 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 59 transitions. [2020-07-21 12:56:52,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:56:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 59 transitions. [2020-07-21 12:56:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-21 12:56:52,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:52,545 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:52,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:52,760 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 433565041, now seen corresponding path program 2 times [2020-07-21 12:56:52,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:52,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521856585] [2020-07-21 12:56:52,763 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 12:56:52,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:52,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 12:56:52,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 69 proven. 379 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2020-07-21 12:56:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:53,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2020-07-21 12:56:54,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521856585] [2020-07-21 12:56:54,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:54,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2020-07-21 12:56:54,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920037888] [2020-07-21 12:56:54,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 12:56:54,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 12:56:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:56:54,144 INFO L87 Difference]: Start difference. First operand 37 states and 59 transitions. Second operand 16 states. [2020-07-21 12:56:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:54,498 INFO L93 Difference]: Finished difference Result 73 states and 184 transitions. [2020-07-21 12:56:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:56:54,499 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2020-07-21 12:56:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:54,503 INFO L225 Difference]: With dead ends: 73 [2020-07-21 12:56:54,503 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 12:56:54,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:56:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 12:56:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2020-07-21 12:56:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 12:56:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 91 transitions. [2020-07-21 12:56:54,523 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 91 transitions. Word has length 157 [2020-07-21 12:56:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:54,524 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 91 transitions. [2020-07-21 12:56:54,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 12:56:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 91 transitions. [2020-07-21 12:56:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-21 12:56:54,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:54,530 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 29, 17, 17, 17, 17, 17, 17, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:54,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:54,744 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1759711241, now seen corresponding path program 2 times [2020-07-21 12:56:54,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:54,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279425584] [2020-07-21 12:56:54,747 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 12:56:54,848 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:54,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 132 proven. 828 refuted. 0 times theorem prover too weak. 2370 trivial. 0 not checked. [2020-07-21 12:56:54,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:56,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 132 proven. 868 refuted. 0 times theorem prover too weak. 2330 trivial. 0 not checked. [2020-07-21 12:56:56,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279425584] [2020-07-21 12:56:56,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:56,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2020-07-21 12:56:56,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581188302] [2020-07-21 12:56:56,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 12:56:56,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:56,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 12:56:56,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-07-21 12:56:56,692 INFO L87 Difference]: Start difference. First operand 47 states and 91 transitions. Second operand 18 states. [2020-07-21 12:56:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:57,140 INFO L93 Difference]: Finished difference Result 88 states and 271 transitions. [2020-07-21 12:56:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:56:57,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 247 [2020-07-21 12:56:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:57,148 INFO L225 Difference]: With dead ends: 88 [2020-07-21 12:56:57,148 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 12:56:57,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 466 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-07-21 12:56:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 12:56:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-07-21 12:56:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 12:56:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 110 transitions. [2020-07-21 12:56:57,172 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 110 transitions. Word has length 247 [2020-07-21 12:56:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:57,173 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 110 transitions. [2020-07-21 12:56:57,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 12:56:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 110 transitions. [2020-07-21 12:56:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1172 [2020-07-21 12:56:57,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:57,217 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 90, 89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:57,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:57,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash 396575871, now seen corresponding path program 3 times [2020-07-21 12:56:57,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:57,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858578292] [2020-07-21 12:56:57,436 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 12:56:57,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:56:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 83304 backedges. 991 proven. 6102 refuted. 0 times theorem prover too weak. 76211 trivial. 0 not checked. [2020-07-21 12:56:58,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:02,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:03,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:04,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 83304 backedges. 991 proven. 6172 refuted. 0 times theorem prover too weak. 76141 trivial. 0 not checked. [2020-07-21 12:57:05,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858578292] [2020-07-21 12:57:05,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:05,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2020-07-21 12:57:05,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051074134] [2020-07-21 12:57:05,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:57:05,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:57:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:57:05,262 INFO L87 Difference]: Start difference. First operand 52 states and 110 transitions. Second operand 22 states. [2020-07-21 12:57:05,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:05,756 INFO L93 Difference]: Finished difference Result 103 states and 376 transitions. [2020-07-21 12:57:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:57:05,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1171 [2020-07-21 12:57:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:05,764 INFO L225 Difference]: With dead ends: 103 [2020-07-21 12:57:05,765 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 12:57:05,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2351 GetRequests, 2307 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-07-21 12:57:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 12:57:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2020-07-21 12:57:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 12:57:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-07-21 12:57:05,789 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 1171 [2020-07-21 12:57:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:05,792 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-07-21 12:57:05,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:57:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-07-21 12:57:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1796 [2020-07-21 12:57:05,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:05,857 INFO L422 BasicCegarLoop]: trace histogram [263, 263, 209, 131, 131, 131, 131, 131, 131, 131, 78, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:06,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:06,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1095714831, now seen corresponding path program 3 times [2020-07-21 12:57:06,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:06,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517211253] [2020-07-21 12:57:06,068 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 12:57:06,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:06,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 3989 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:57:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 193608 backedges. 31016 proven. 418 refuted. 0 times theorem prover too weak. 162174 trivial. 0 not checked. [2020-07-21 12:57:08,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:15,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:15,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 193608 backedges. 1796 proven. 13893 refuted. 0 times theorem prover too weak. 177919 trivial. 0 not checked. [2020-07-21 12:57:16,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517211253] [2020-07-21 12:57:16,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:16,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 12:57:16,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33822796] [2020-07-21 12:57:16,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 12:57:16,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 12:57:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 12:57:16,981 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 21 states. [2020-07-21 12:57:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:17,460 INFO L93 Difference]: Finished difference Result 135 states and 390 transitions. [2020-07-21 12:57:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 12:57:17,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1795 [2020-07-21 12:57:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:17,465 INFO L225 Difference]: With dead ends: 135 [2020-07-21 12:57:17,466 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 12:57:17,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3605 GetRequests, 3553 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:57:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 12:57:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-07-21 12:57:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 12:57:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-07-21 12:57:17,485 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 1795 [2020-07-21 12:57:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:17,486 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-07-21 12:57:17,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 12:57:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-07-21 12:57:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2020-07-21 12:57:17,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:17,496 INFO L422 BasicCegarLoop]: trace histogram [147, 147, 119, 73, 73, 73, 73, 73, 73, 73, 46, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:17,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2114371631, now seen corresponding path program 4 times [2020-07-21 12:57:17,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:17,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618827872] [2020-07-21 12:57:17,706 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 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 12:57:18,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 12:57:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 27596 proven. 1596 refuted. 0 times theorem prover too weak. 31265 trivial. 0 not checked. [2020-07-21 12:57:18,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:23,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:24,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:25,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 1682 proven. 8762 refuted. 0 times theorem prover too weak. 50013 trivial. 0 not checked. [2020-07-21 12:57:26,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618827872] [2020-07-21 12:57:26,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:26,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 12:57:26,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054465302] [2020-07-21 12:57:26,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 12:57:26,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 12:57:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 12:57:26,416 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand 29 states. [2020-07-21 12:57:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:27,336 INFO L93 Difference]: Finished difference Result 189 states and 388 transitions. [2020-07-21 12:57:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 12:57:27,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1009 [2020-07-21 12:57:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:27,341 INFO L225 Difference]: With dead ends: 189 [2020-07-21 12:57:27,341 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 12:57:27,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2043 GetRequests, 1965 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 12:57:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 12:57:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2020-07-21 12:57:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 12:57:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2020-07-21 12:57:27,358 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 1009 [2020-07-21 12:57:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:27,359 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2020-07-21 12:57:27,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 12:57:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2020-07-21 12:57:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2020-07-21 12:57:27,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:27,368 INFO L422 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:27,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:27,584 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash 838202223, now seen corresponding path program 5 times [2020-07-21 12:57:27,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:27,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083142296] [2020-07-21 12:57:27,585 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:27,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-21 12:57:27,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 4043 proven. 7419 refuted. 0 times theorem prover too weak. 39448 trivial. 0 not checked. [2020-07-21 12:57:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:32,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:32,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:32,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:33,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:33,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:33,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:33,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:34,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:34,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 4043 proven. 7566 refuted. 0 times theorem prover too weak. 39301 trivial. 0 not checked. [2020-07-21 12:57:38,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083142296] [2020-07-21 12:57:38,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:38,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35] total 37 [2020-07-21 12:57:38,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23687892] [2020-07-21 12:57:38,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 12:57:38,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:38,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 12:57:38,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:57:38,468 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 37 states. [2020-07-21 12:57:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:40,049 INFO L93 Difference]: Finished difference Result 258 states and 499 transitions. [2020-07-21 12:57:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 12:57:40,050 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 927 [2020-07-21 12:57:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:40,053 INFO L225 Difference]: With dead ends: 258 [2020-07-21 12:57:40,054 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 12:57:40,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1889 GetRequests, 1785 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1259, Invalid=3997, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 12:57:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 12:57:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2020-07-21 12:57:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 12:57:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 187 transitions. [2020-07-21 12:57:40,091 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 187 transitions. Word has length 927 [2020-07-21 12:57:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:40,096 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 187 transitions. [2020-07-21 12:57:40,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 12:57:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 187 transitions. [2020-07-21 12:57:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 12:57:40,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:40,106 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:40,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:40,321 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 6 times [2020-07-21 12:57:40,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:40,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855566684] [2020-07-21 12:57:40,322 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:40,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:40,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-21 12:57:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 12:57:41,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:43,009 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:43,190 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:43,449 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:43,631 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:44,919 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:57:45,307 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:57:45,700 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:57:46,100 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:57:47,604 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:47,780 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:47,964 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:48,150 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:49,062 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 12:57:49,975 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 12:57:50,901 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 12:57:51,895 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 12:57:53,466 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:53,667 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:57:53,855 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:54,042 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:57:55,406 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:57:55,806 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:57:56,213 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:57:56,616 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:57:58,992 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 12:58:01,418 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 12:58:03,813 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 12:58:06,219 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 12:58:08,137 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:08,341 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:08,551 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:08,755 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:09,738 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:09,846 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:10,274 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:58:10,707 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:58:11,148 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:58:11,593 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:58:12,062 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-21 12:58:12,517 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-21 12:58:12,961 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-21 12:58:13,386 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-21 12:58:13,811 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-07-21 12:58:14,236 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-07-21 12:58:14,645 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2020-07-21 12:58:15,050 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-07-21 12:58:15,446 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-07-21 12:58:15,830 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-21 12:58:16,207 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 12:58:16,577 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-07-21 12:58:16,940 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-07-21 12:58:17,312 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 12:58:17,702 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-07-21 12:58:18,038 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-07-21 12:58:18,367 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-07-21 12:58:18,691 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-21 12:58:19,006 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 12:58:19,316 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-07-21 12:58:19,620 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-07-21 12:58:19,912 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 12:58:20,209 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 12:58:20,496 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-07-21 12:58:20,780 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 12:58:21,051 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-07-21 12:58:21,311 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-07-21 12:58:21,573 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-07-21 12:58:21,825 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-07-21 12:58:22,073 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-21 12:58:22,310 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-07-21 12:58:22,544 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 12:58:22,774 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-07-21 12:58:22,997 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 12:58:23,210 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 12:58:23,415 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 12:58:23,616 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 12:58:23,810 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 12:58:23,999 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 12:58:24,184 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 12:58:24,363 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 12:58:24,536 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-07-21 12:58:24,704 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 12:58:24,868 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 12:58:25,026 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 12:58:25,178 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 12:58:25,324 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 12:58:25,464 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 12:58:25,599 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 12:58:25,726 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 12:58:25,851 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 12:58:25,969 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 12:58:26,084 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 12:58:26,192 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 12:58:26,298 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 12:58:28,339 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:28,444 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:28,556 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:28,665 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:28,782 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 12:58:28,888 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:58:29,028 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 12:58:33,182 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:33,290 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:33,407 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:33,519 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:34,295 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:34,518 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:34,748 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:34,982 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:37,540 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:37,654 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:37,770 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:37,882 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:40,567 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:40,678 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:40,794 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:40,910 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:41,706 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:41,937 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:42,177 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:42,413 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:43,346 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:43,458 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:43,578 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:43,695 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:44,169 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:58:44,697 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:58:45,197 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:58:45,697 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:58:46,625 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:46,737 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:46,857 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:46,977 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:47,789 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:48,026 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:48,272 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:48,515 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:49,639 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 12:58:50,806 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 12:58:51,957 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 12:58:53,114 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 12:58:54,344 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:54,486 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:58:54,611 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:54,738 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:58:55,637 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:55,880 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:56,136 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:56,391 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:58:56,690 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 12:58:56,936 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 12:58:57,183 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 12:58:57,424 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 12:58:57,658 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 12:58:57,886 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 12:58:58,106 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 12:58:58,321 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-07-21 12:58:58,531 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 12:58:58,734 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-07-21 12:58:58,929 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 12:58:59,122 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 12:58:59,304 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 12:58:59,477 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-21 12:58:59,639 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-07-21 12:58:59,800 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:58:59,955 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 12:59:00,100 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 12:59:00,243 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 12:59:00,380 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 12:59:00,510 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:59:00,639 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 12:59:00,758 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 12:59:00,872 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 12:59:00,982 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 12:59:01,091 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 12:59:05,191 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:05,320 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:05,452 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:05,586 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:08,768 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:08,895 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:09,030 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:09,167 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:10,112 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:59:10,369 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:59:10,641 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:59:10,911 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:59:12,034 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:12,159 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:12,292 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:12,421 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:12,949 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:59:13,547 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 12:59:14,091 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:59:14,635 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 12:59:15,864 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:16,000 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:16,139 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:16,274 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:16,420 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 12:59:16,554 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:59:16,682 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 12:59:16,806 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 12:59:16,922 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 12:59:17,036 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 12:59:17,144 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 12:59:17,247 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 12:59:21,636 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:21,769 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:21,910 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:22,052 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:23,069 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:59:23,338 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 12:59:23,618 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:59:23,896 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 12:59:27,361 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:27,494 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 12:59:27,637 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:27,780 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 12:59:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 12:59:30,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855566684] [2020-07-21 12:59:30,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:30,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 12:59:30,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289813810] [2020-07-21 12:59:30,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 12:59:30,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 12:59:30,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 12:59:30,577 INFO L87 Difference]: Start difference. First operand 130 states and 187 transitions. Second operand 36 states. [2020-07-21 12:59:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:31,135 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2020-07-21 12:59:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 12:59:31,138 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-21 12:59:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:31,140 INFO L225 Difference]: With dead ends: 131 [2020-07-21 12:59:31,140 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:59:31,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:59:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:59:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:59:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:59:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:59:31,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 12:59:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:31,144 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:59:31,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 12:59:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:59:31,144 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:59:31,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:31,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:59:32,427 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 8 [2020-07-21 12:59:33,569 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-07-21 12:59:33,573 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:59:33,574 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 12:59:33,574 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 12:59:33,574 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 12:59:33,574 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (<= 8 |fibonacci_#in~n|)) (.cse3 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|) (<= 5 |fibonacci_#in~n|) .cse1) (and .cse0 .cse2 (<= 21 |fibonacci_#t~ret0|) .cse1) (and .cse3 .cse0 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1) (and .cse0 (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7) (<= 7 |fibonacci_#in~n|)) (and .cse0 (< |fibonacci_#in~n| 9) .cse2 .cse1 (<= 13 |fibonacci_#t~ret0|)) (and (<= 3 |fibonacci_#in~n|) .cse3 .cse0 (<= |fibonacci_#in~n| 3) .cse1) (and .cse0 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 4) .cse1) (and (<= 5 |fibonacci_#t~ret0|) .cse0 (<= 6 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 6) .cse1))) [2020-07-21 12:59:33,574 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:59:33,574 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:59:33,575 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 12:59:33,575 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 12:59:33,576 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 12:59:33,576 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 12:59:33,576 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 12:59:33,576 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 12:59:33,576 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 12:59:33,576 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 12:59:33,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:59:33 BoogieIcfgContainer [2020-07-21 12:59:33,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:59:33,584 INFO L168 Benchmark]: Toolchain (without parser) took 164078.12 ms. Allocated memory was 144.7 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 102.4 MB in the beginning and 1.0 GB in the end (delta: -942.3 MB). Peak memory consumption was 809.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,589 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,590 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.33 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,591 INFO L168 Benchmark]: Boogie Preprocessor took 116.42 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 179.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,594 INFO L168 Benchmark]: RCFGBuilder took 234.40 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 167.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,594 INFO L168 Benchmark]: TraceAbstraction took 163460.61 ms. Allocated memory was 200.8 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 167.0 MB in the beginning and 1.0 GB in the end (delta: -877.6 MB). Peak memory consumption was 818.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:59:33,601 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.33 ms. Allocated memory is still 144.7 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.42 ms. Allocated memory was 144.7 MB in the beginning and 200.8 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 179.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 234.40 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 167.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 163460.61 ms. Allocated memory was 200.8 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 167.0 MB in the beginning and 1.0 GB in the end (delta: -877.6 MB). Peak memory consumption was 818.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 161.1s, OverallIterations: 11, TraceHistogramMax: 263, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 279 SDtfs, 1216 SDslu, 1609 SDs, 0 SdLazy, 2083 SolverSat, 2086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12408 GetRequests, 11827 SyntacticMatches, 282 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 151 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 194 PreInvPairs, 314 NumberOfFragments, 139 HoareAnnotationTreeSize, 194 FomulaSimplifications, 7646 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2567 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 150.2s InterpolantComputationTime, 6167 NumberOfCodeBlocks, 6167 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 12285 ConstructedInterpolants, 0 QuantifiedInterpolants, 17827293 SizeOfPredicates, 80 NumberOfNonLiveVariables, 13738 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 787816/852220 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...