/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:45:09,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:45:09,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:45:09,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:45:09,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:45:09,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:45:09,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:45:09,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:45:09,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:45:09,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:45:09,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:45:09,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:45:09,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:45:09,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:45:09,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:45:09,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:45:09,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:45:09,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:45:09,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:45:09,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:45:09,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:45:09,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:45:09,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:45:09,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:45:09,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:45:09,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:45:09,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:45:09,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:45:09,328 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 15:45:09,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:45:09,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:45:09,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:45:09,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:45:09,344 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:45:09,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:45:09,344 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:45:09,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:45:09,346 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:45:09,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:45:09,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:45:09,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:45:09,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:45:09,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:45:09,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:45:09,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:45:09,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:45:09,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:45:09,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:45:09,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:09,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:09,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:09,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:09,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:09,655 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:09,656 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 15:45:09,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b983da2/0bf2f87a872b4bddb003e6e157593b70/FLAGdccd2b28b [2020-07-21 15:45:10,190 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:10,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-07-21 15:45:10,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b983da2/0bf2f87a872b4bddb003e6e157593b70/FLAGdccd2b28b [2020-07-21 15:45:10,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b983da2/0bf2f87a872b4bddb003e6e157593b70 [2020-07-21 15:45:10,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:10,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:10,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:10,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:10,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:10,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca38bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10, skipping insertion in model container [2020-07-21 15:45:10,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:10,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:10,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:10,795 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:10,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:10,825 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:10,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10 WrapperNode [2020-07-21 15:45:10,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:10,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:10,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:10,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:10,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (1/1) ... [2020-07-21 15:45:10,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:10,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:10,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:10,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:10,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (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 15:45:11,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 15:45:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:45:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 15:45:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:11,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:11,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:11,173 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:45:11,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:11 BoogieIcfgContainer [2020-07-21 15:45:11,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:11,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:11,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:11,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:11,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:10" (1/3) ... [2020-07-21 15:45:11,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b595e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:11, skipping insertion in model container [2020-07-21 15:45:11,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:10" (2/3) ... [2020-07-21 15:45:11,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b595e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:11, skipping insertion in model container [2020-07-21 15:45:11,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:11" (3/3) ... [2020-07-21 15:45:11,186 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-07-21 15:45:11,196 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:11,204 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:11,214 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:11,236 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:11,237 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:11,237 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:11,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:11,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:11,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:11,238 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:11,238 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 15:45:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:45:11,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 15:45:11,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856577393] [2020-07-21 15:45:11,279 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 15:45:11,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:11,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,499 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 15:45:11,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:11,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856577393] [2020-07-21 15:45:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:11,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:11,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143812033] [2020-07-21 15:45:11,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:11,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:11,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:11,521 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 15:45:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:11,636 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 15:45:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:11,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:45:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:11,649 INFO L225 Difference]: With dead ends: 36 [2020-07-21 15:45:11,649 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 15:45:11,652 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 15:45:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 15:45:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 15:45:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 15:45:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 15:45:11,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 15:45:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:11,699 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 15:45:11,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 15:45:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 15:45:11,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:11,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:11,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:11,916 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 15:45:11,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:11,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254101046] [2020-07-21 15:45:11,917 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 15:45:11,944 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:11,978 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 15:45:11,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:11,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254101046] [2020-07-21 15:45:11,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:11,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:45:11,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630594597] [2020-07-21 15:45:11,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:45:11,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:45:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:45:11,984 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-07-21 15:45:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:12,073 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 15:45:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:45:12,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 15:45:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:12,077 INFO L225 Difference]: With dead ends: 28 [2020-07-21 15:45:12,077 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 15:45:12,079 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 15:45:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 15:45:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 15:45:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 15:45:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 15:45:12,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 15:45:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:12,088 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 15:45:12,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 15:45:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:45:12,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:12,090 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 15:45:12,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,306 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 15:45:12,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:12,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904882003] [2020-07-21 15:45:12,310 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 15:45:12,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:45:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:12,398 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 15:45:12,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:12,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:12,607 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 15:45:12,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904882003] [2020-07-21 15:45:12,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:12,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-07-21 15:45:12,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290864425] [2020-07-21 15:45:12,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:45:12,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:12,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:45:12,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:12,610 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 10 states. [2020-07-21 15:45:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:12,742 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-07-21 15:45:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:12,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 15:45:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:12,745 INFO L225 Difference]: With dead ends: 40 [2020-07-21 15:45:12,745 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 15:45:12,746 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 15:45:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 15:45:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-21 15:45:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 15:45:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2020-07-21 15:45:12,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 27 [2020-07-21 15:45:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:12,763 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2020-07-21 15:45:12,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:45:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-07-21 15:45:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 15:45:12,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:12,766 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 15:45:12,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:12,981 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 1 times [2020-07-21 15:45:12,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:12,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309844701] [2020-07-21 15:45:12,983 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 15:45:13,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 15:45:13,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:13,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 15:45:13,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309844701] [2020-07-21 15:45:13,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:13,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 15:45:13,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274582337] [2020-07-21 15:45:13,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:45:13,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:45:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:45:13,629 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 13 states. [2020-07-21 15:45:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:13,907 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2020-07-21 15:45:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:45:13,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-21 15:45:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:13,910 INFO L225 Difference]: With dead ends: 64 [2020-07-21 15:45:13,910 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 15:45:13,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:45:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 15:45:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 15:45:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 15:45:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-07-21 15:45:13,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 55 [2020-07-21 15:45:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:13,922 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-07-21 15:45:13,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:45:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-07-21 15:45:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 15:45:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:13,926 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:14,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:14,140 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1197309312, now seen corresponding path program 2 times [2020-07-21 15:45:14,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:14,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101351486] [2020-07-21 15:45:14,142 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 15:45:14,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:45:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 221 proven. 12 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-07-21 15:45:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:14,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 126 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 15:45:14,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101351486] [2020-07-21 15:45:14,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:14,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 15:45:14,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980350347] [2020-07-21 15:45:14,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:45:14,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:45:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:45:14,787 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 11 states. [2020-07-21 15:45:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:14,944 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-07-21 15:45:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:45:14,947 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-07-21 15:45:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:14,949 INFO L225 Difference]: With dead ends: 75 [2020-07-21 15:45:14,950 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 15:45:14,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:45:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 15:45:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-21 15:45:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 15:45:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 15:45:14,964 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 94 [2020-07-21 15:45:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 15:45:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:45:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 15:45:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 15:45:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:14,970 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:15,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:15,178 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1611334083, now seen corresponding path program 3 times [2020-07-21 15:45:15,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:15,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743069064] [2020-07-21 15:45:15,181 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 15:45:15,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:15,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:45:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 120 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-21 15:45:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:15,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:15,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-21 15:45:16,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743069064] [2020-07-21 15:45:16,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:16,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 15:45:16,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036020215] [2020-07-21 15:45:16,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:45:16,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:45:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:45:16,164 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 17 states. [2020-07-21 15:45:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:16,547 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2020-07-21 15:45:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:45:16,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-07-21 15:45:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:16,551 INFO L225 Difference]: With dead ends: 85 [2020-07-21 15:45:16,551 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 15:45:16,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:45:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 15:45:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-07-21 15:45:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 15:45:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-07-21 15:45:16,562 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 83 [2020-07-21 15:45:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:16,563 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-07-21 15:45:16,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:45:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-07-21 15:45:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 15:45:16,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:16,565 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:16,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:16,778 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 4 times [2020-07-21 15:45:16,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:16,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832096417] [2020-07-21 15:45:16,780 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 15:45:16,843 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:45:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 15:45:16,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:17,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 15:45:17,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832096417] [2020-07-21 15:45:17,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:17,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2020-07-21 15:45:17,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777058515] [2020-07-21 15:45:17,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:45:17,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:45:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:17,447 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 14 states. [2020-07-21 15:45:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:17,643 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-07-21 15:45:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:45:17,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-07-21 15:45:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:17,646 INFO L225 Difference]: With dead ends: 61 [2020-07-21 15:45:17,646 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 15:45:17,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 15:45:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 15:45:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 15:45:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2020-07-21 15:45:17,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 69 [2020-07-21 15:45:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:17,662 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2020-07-21 15:45:17,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:45:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2020-07-21 15:45:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-07-21 15:45:17,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:17,667 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 15:45:17,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:17,872 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1194505795, now seen corresponding path program 5 times [2020-07-21 15:45:17,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:17,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368775300] [2020-07-21 15:45:17,874 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 15:45:17,973 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:45:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 1896 proven. 276 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-07-21 15:45:18,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:19,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:19,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:19,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 316 proven. 1092 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-07-21 15:45:20,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368775300] [2020-07-21 15:45:20,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:20,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 15:45:20,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898501723] [2020-07-21 15:45:20,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:45:20,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:45:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:45:20,222 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand 21 states. [2020-07-21 15:45:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:20,761 INFO L93 Difference]: Finished difference Result 118 states and 183 transitions. [2020-07-21 15:45:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:45:20,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 247 [2020-07-21 15:45:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:20,765 INFO L225 Difference]: With dead ends: 118 [2020-07-21 15:45:20,765 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:45:20,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 457 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 15:45:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:45:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-07-21 15:45:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 15:45:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-07-21 15:45:20,788 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 247 [2020-07-21 15:45:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:20,788 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-07-21 15:45:20,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:45:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-07-21 15:45:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-21 15:45:20,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:20,797 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:21,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:21,012 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 6 times [2020-07-21 15:45:21,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:21,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917863201] [2020-07-21 15:45:21,014 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 15:45:21,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:21,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:45:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-21 15:45:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:22,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:22,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-21 15:45:23,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917863201] [2020-07-21 15:45:23,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:23,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:45:23,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208090649] [2020-07-21 15:45:23,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:45:23,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:23,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:45:23,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:45:23,799 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 25 states. [2020-07-21 15:45:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:24,562 INFO L93 Difference]: Finished difference Result 145 states and 221 transitions. [2020-07-21 15:45:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 15:45:24,563 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 219 [2020-07-21 15:45:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:24,567 INFO L225 Difference]: With dead ends: 145 [2020-07-21 15:45:24,567 INFO L226 Difference]: Without dead ends: 89 [2020-07-21 15:45:24,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 393 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:45:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-21 15:45:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-07-21 15:45:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 15:45:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-07-21 15:45:24,580 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2020-07-21 15:45:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:24,581 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-07-21 15:45:24,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:45:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-07-21 15:45:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 15:45:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:24,586 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:24,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:24,800 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2082787635, now seen corresponding path program 7 times [2020-07-21 15:45:24,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:24,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124822728] [2020-07-21 15:45:24,802 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 15:45:24,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:45:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 964 proven. 1596 refuted. 0 times theorem prover too weak. 3479 trivial. 0 not checked. [2020-07-21 15:45:25,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:26,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:27,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:28,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:29,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:29,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:29,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 964 proven. 1676 refuted. 0 times theorem prover too weak. 3399 trivial. 0 not checked. [2020-07-21 15:45:29,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124822728] [2020-07-21 15:45:29,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:29,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 15:45:29,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395568302] [2020-07-21 15:45:29,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:45:29,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:45:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:45:29,261 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 29 states. [2020-07-21 15:45:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:30,239 INFO L93 Difference]: Finished difference Result 183 states and 294 transitions. [2020-07-21 15:45:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:45:30,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 328 [2020-07-21 15:45:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:30,244 INFO L225 Difference]: With dead ends: 183 [2020-07-21 15:45:30,245 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 15:45:30,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 603 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 15:45:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 15:45:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-21 15:45:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 15:45:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2020-07-21 15:45:30,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 328 [2020-07-21 15:45:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:30,267 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2020-07-21 15:45:30,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:45:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2020-07-21 15:45:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 15:45:30,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:30,269 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:30,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:30,470 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 39069676, now seen corresponding path program 8 times [2020-07-21 15:45:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:30,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061922686] [2020-07-21 15:45:30,472 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 15:45:30,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:30,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:45:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-21 15:45:30,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:32,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:32,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:33,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:33,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:33,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-21 15:45:33,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061922686] [2020-07-21 15:45:33,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:33,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2020-07-21 15:45:33,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071475959] [2020-07-21 15:45:33,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 15:45:33,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:33,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 15:45:33,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-07-21 15:45:33,323 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand 20 states. [2020-07-21 15:45:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:33,610 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-21 15:45:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:33,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 287 [2020-07-21 15:45:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:33,614 INFO L225 Difference]: With dead ends: 110 [2020-07-21 15:45:33,614 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 15:45:33,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 542 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-07-21 15:45:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 15:45:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-21 15:45:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 15:45:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2020-07-21 15:45:33,627 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 287 [2020-07-21 15:45:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:33,628 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2020-07-21 15:45:33,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 15:45:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2020-07-21 15:45:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-07-21 15:45:33,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:33,635 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:33,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:33,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1040725259, now seen corresponding path program 9 times [2020-07-21 15:45:33,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:33,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157693377] [2020-07-21 15:45:33,851 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:34,147 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 15:45:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 19991 proven. 3340 refuted. 0 times theorem prover too weak. 16157 trivial. 0 not checked. [2020-07-21 15:45:34,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:39,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:39,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:40,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:41,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:42,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:42,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:42,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:42,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:43,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:43,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 2346 proven. 6780 refuted. 0 times theorem prover too weak. 30362 trivial. 0 not checked. [2020-07-21 15:45:43,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157693377] [2020-07-21 15:45:43,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:43,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-21 15:45:43,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941204721] [2020-07-21 15:45:43,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:45:43,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:45:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:45:43,625 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 33 states. [2020-07-21 15:45:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:44,822 INFO L93 Difference]: Finished difference Result 226 states and 393 transitions. [2020-07-21 15:45:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 15:45:44,823 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 818 [2020-07-21 15:45:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:44,826 INFO L225 Difference]: With dead ends: 226 [2020-07-21 15:45:44,826 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 15:45:44,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1575 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-21 15:45:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 15:45:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2020-07-21 15:45:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-21 15:45:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 165 transitions. [2020-07-21 15:45:44,842 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 165 transitions. Word has length 818 [2020-07-21 15:45:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:44,843 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 165 transitions. [2020-07-21 15:45:44,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:45:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 165 transitions. [2020-07-21 15:45:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2020-07-21 15:45:44,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:44,854 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:45,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:45,068 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash 405953011, now seen corresponding path program 10 times [2020-07-21 15:45:45,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:45,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180599739] [2020-07-21 15:45:45,070 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:45,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-21 15:45:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 4390 proven. 9059 refuted. 0 times theorem prover too weak. 50332 trivial. 0 not checked. [2020-07-21 15:45:46,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:51,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:52,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:53,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:54,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:54,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:54,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:54,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:54,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:56,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:57,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:58,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:45:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 4390 proven. 9236 refuted. 0 times theorem prover too weak. 50155 trivial. 0 not checked. [2020-07-21 15:45:59,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180599739] [2020-07-21 15:45:59,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:59,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37] total 41 [2020-07-21 15:45:59,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367779849] [2020-07-21 15:45:59,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-21 15:45:59,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-21 15:45:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:45:59,348 INFO L87 Difference]: Start difference. First operand 116 states and 165 transitions. Second operand 41 states. [2020-07-21 15:46:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:01,940 INFO L93 Difference]: Finished difference Result 295 states and 563 transitions. [2020-07-21 15:46:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-21 15:46:01,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 1036 [2020-07-21 15:46:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:01,948 INFO L225 Difference]: With dead ends: 295 [2020-07-21 15:46:01,948 INFO L226 Difference]: Without dead ends: 188 [2020-07-21 15:46:01,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2112 GetRequests, 1999 SyntacticMatches, 33 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1531, Invalid=5111, Unknown=0, NotChecked=0, Total=6642 [2020-07-21 15:46:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-21 15:46:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2020-07-21 15:46:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 15:46:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2020-07-21 15:46:01,996 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 1036 [2020-07-21 15:46:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:02,001 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2020-07-21 15:46:02,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-21 15:46:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2020-07-21 15:46:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 15:46:02,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:02,011 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 15:46:02,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:02,225 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 11 times [2020-07-21 15:46:02,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:02,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851617248] [2020-07-21 15:46:02,226 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:02,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 220 conjunts are in the unsatisfiable core [2020-07-21 15:46:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:03,534 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 15:46:03,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:05,162 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:05,350 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:05,556 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:05,757 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:07,212 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:07,640 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:08,121 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:08,552 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:10,235 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:10,428 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:10,630 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:10,832 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:11,849 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 15:46:12,857 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 15:46:13,976 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 15:46:15,015 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 15:46:15,779 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:15,882 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:15,994 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:16,103 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:16,790 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:16,998 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:17,204 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:17,407 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:18,457 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:18,926 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:19,355 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:19,804 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:20,247 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:22,759 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 15:46:25,329 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 491 [2020-07-21 15:46:27,960 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 15:46:30,644 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 493 [2020-07-21 15:46:31,605 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:31,708 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:31,818 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:31,930 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:32,715 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:32,947 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:46:33,191 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:33,448 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:34,401 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:34,508 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:34,624 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:34,739 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:35,214 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:35,672 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:36,151 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:36,642 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:46:37,157 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2020-07-21 15:46:37,645 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-07-21 15:46:38,119 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2020-07-21 15:46:38,611 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2020-07-21 15:46:39,091 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-21 15:46:39,549 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 252 [2020-07-21 15:46:40,001 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-21 15:46:40,473 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2020-07-21 15:46:40,910 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 15:46:41,321 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2020-07-21 15:46:41,737 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-07-21 15:46:42,137 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-07-21 15:46:42,528 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 15:46:42,919 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 15:46:43,307 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-07-21 15:46:43,697 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-07-21 15:46:44,080 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 15:46:44,449 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-21 15:46:44,809 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-07-21 15:46:45,153 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 15:46:45,478 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-21 15:46:45,812 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-07-21 15:46:46,134 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 15:46:46,447 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-07-21 15:46:46,753 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:46:47,049 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 15:46:47,370 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-07-21 15:46:47,652 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-07-21 15:46:47,925 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 15:46:48,208 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-07-21 15:46:48,466 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 15:46:48,723 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-07-21 15:46:48,974 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 15:46:49,231 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-07-21 15:46:49,477 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-07-21 15:46:49,711 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-21 15:46:49,943 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-21 15:46:50,181 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 15:46:50,405 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-21 15:46:50,619 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-21 15:46:50,826 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 15:46:51,018 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 15:46:51,212 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 15:46:51,399 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 15:46:51,579 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-21 15:46:51,752 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:46:51,918 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 15:46:52,081 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 15:46:52,240 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 15:46:52,392 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-07-21 15:46:52,544 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:46:52,682 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 15:46:52,819 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 15:46:52,950 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 15:46:53,067 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 15:46:53,180 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 15:46:53,289 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 15:46:55,587 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:55,712 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:46:55,847 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:55,979 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:46:56,139 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 15:46:56,268 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:46:56,392 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 15:46:56,510 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 15:46:56,626 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 15:46:56,734 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 15:46:56,840 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:47:00,998 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:01,130 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:01,263 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:01,391 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:02,301 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:02,558 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:02,841 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:03,128 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:06,834 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:06,972 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:07,115 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:07,255 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:10,230 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:10,359 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:10,499 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:10,639 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:11,636 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:11,898 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:12,163 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:12,421 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:13,464 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:13,587 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:13,716 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:13,844 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:14,360 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:47:14,888 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:47:15,437 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:47:15,989 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:47:17,179 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:17,309 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:17,448 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:17,587 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:18,630 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:18,918 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:19,229 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:19,531 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:20,743 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 15:47:21,989 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 15:47:23,220 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 15:47:24,460 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-21 15:47:25,832 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:25,974 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:26,129 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:26,272 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:27,484 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:27,778 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:28,081 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:28,369 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:28,674 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-07-21 15:47:28,953 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 15:47:29,231 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-07-21 15:47:29,501 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-07-21 15:47:29,779 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 15:47:30,050 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 15:47:30,313 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-07-21 15:47:30,564 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 15:47:30,793 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-21 15:47:31,019 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 15:47:31,237 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 15:47:31,454 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-07-21 15:47:31,667 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-21 15:47:31,886 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 15:47:32,095 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 15:47:32,286 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-07-21 15:47:32,472 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-07-21 15:47:32,643 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 15:47:32,813 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 15:47:32,971 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 15:47:33,120 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 15:47:33,266 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 15:47:33,407 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:47:33,541 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 15:47:33,675 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:47:33,807 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 15:47:33,926 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 15:47:34,055 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 15:47:34,192 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:34,302 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:47:39,055 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:39,197 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:39,335 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:39,478 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:43,038 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:43,175 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:43,328 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:43,469 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:44,511 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:44,787 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:47:45,073 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:45,352 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:47:45,942 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:47:46,641 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:46,783 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:46,920 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:47,057 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:47,611 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:47:48,171 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 15:47:48,735 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:47:49,286 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 15:47:50,713 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:50,884 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:51,053 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:51,216 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:51,390 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 15:47:51,560 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 15:47:51,696 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 15:47:51,830 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 15:47:51,950 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 15:47:52,068 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:47:52,175 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 15:47:52,277 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 15:47:55,387 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 15:47:58,252 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:58,408 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:47:58,577 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:58,747 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:47:59,883 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:48:00,189 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 15:48:00,512 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:48:00,834 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 15:48:05,356 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:48:05,519 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:48:05,691 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:48:05,858 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:48:09,226 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 15:48:09,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851617248] [2020-07-21 15:48:09,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:09,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 15:48:09,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791722431] [2020-07-21 15:48:09,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 15:48:09,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 15:48:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 15:48:09,230 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand 36 states. [2020-07-21 15:48:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:09,715 INFO L93 Difference]: Finished difference Result 147 states and 218 transitions. [2020-07-21 15:48:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 15:48:09,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2020-07-21 15:48:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:09,719 INFO L225 Difference]: With dead ends: 147 [2020-07-21 15:48:09,720 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:48:09,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1301 SyntacticMatches, 164 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 15:48:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:48:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:48:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:48:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:48:09,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 15:48:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:09,723 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:48:09,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 15:48:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:48:09,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:48:09,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:09,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:48:11,188 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 8 [2020-07-21 15:48:12,683 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-21 15:48:12,690 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:48:12,690 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 15:48:12,690 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 15:48:12,690 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (or (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6)) (and (<= 2 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 4)) (and (<= 8 |fibonacci_#t~ret0|) (<= fibonacci_~n 7)) (and (<= |fibonacci_#in~n| 5) (<= 3 |fibonacci_#t~ret0|)) (and (< |fibonacci_#in~n| 9) (<= 13 |fibonacci_#t~ret0|)) (<= |fibonacci_#in~n| 3) (<= 21 |fibonacci_#t~ret0|)) (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:48:12,691 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:48:12,692 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:48:12,692 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:48:12,692 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:48:12,692 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 15:48:12,692 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 15:48:12,693 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 15:48:12,694 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 15:48:12,694 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 15:48:12,694 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 15:48:12,694 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 15:48:12,694 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 15:48:12,694 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 15:48:12,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:48:12 BoogieIcfgContainer [2020-07-21 15:48:12,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:48:12,701 INFO L168 Benchmark]: Toolchain (without parser) took 182108.07 ms. Allocated memory was 144.2 MB in the beginning and 952.6 MB in the end (delta: 808.5 MB). Free memory was 102.0 MB in the beginning and 764.3 MB in the end (delta: -662.3 MB). Peak memory consumption was 895.1 MB. Max. memory is 7.1 GB. [2020-07-21 15:48:12,701 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 144.2 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 15:48:12,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.68 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:48:12,702 INFO L168 Benchmark]: Boogie Preprocessor took 25.95 ms. Allocated memory is still 144.2 MB. Free memory was 92.3 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:48:12,702 INFO L168 Benchmark]: RCFGBuilder took 325.64 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.8 MB in the beginning and 168.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:48:12,703 INFO L168 Benchmark]: TraceAbstraction took 181520.74 ms. Allocated memory was 201.3 MB in the beginning and 952.6 MB in the end (delta: 751.3 MB). Free memory was 168.0 MB in the beginning and 764.3 MB in the end (delta: -596.3 MB). Peak memory consumption was 904.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:48:12,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 144.2 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.68 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.95 ms. Allocated memory is still 144.2 MB. Free memory was 92.3 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.64 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.8 MB in the beginning and 168.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 181520.74 ms. Allocated memory was 201.3 MB in the beginning and 952.6 MB in the end (delta: 751.3 MB). Free memory was 168.0 MB in the beginning and 764.3 MB in the end (delta: -596.3 MB). Peak memory consumption was 904.0 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: 178.7s, OverallIterations: 14, TraceHistogramMax: 151, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 387 SDtfs, 1941 SDslu, 2097 SDs, 0 SdLazy, 3087 SolverSat, 2709 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8228 GetRequests, 7458 SyntacticMatches, 341 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7771 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 96 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 320 PreInvPairs, 427 NumberOfFragments, 71 HoareAnnotationTreeSize, 320 FomulaSimplifications, 1419 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3543 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 164.9s InterpolantComputationTime, 4042 NumberOfCodeBlocks, 2590 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 8029 ConstructedInterpolants, 0 QuantifiedInterpolants, 8308925 SizeOfPredicates, 113 NumberOfNonLiveVariables, 6908 ConjunctsInSsa, 424 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 260104/307770 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...