/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:56:26,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:56:26,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:56:26,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:56:26,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:56:26,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:56:26,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:56:26,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:56:26,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:56:26,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:56:26,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:56:26,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:56:26,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:56:26,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:56:26,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:56:26,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:56:26,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:56:26,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:56:26,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:56:26,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:56:26,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:56:26,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:56:26,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:56:26,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:56:26,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:56:26,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:56:26,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:56:26,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:56:26,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:56:26,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:56:26,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:56:26,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:56:26,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:56:26,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:56:26,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:56:26,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:56:26,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:56:26,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:56:26,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:56:26,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:56:26,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:56:26,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:56:26,702 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:56:26,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:56:26,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:56:26,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:56:26,705 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:56:26,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:56:26,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:56:26,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:56:26,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:56:26,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:56:26,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:56:26,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:56:26,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:56:26,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:56:26,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:56:26,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:56:26,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:56:26,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:56:26,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:56:26,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:56:26,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:56:26,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:26,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:56:26,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:56:26,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:56:26,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:56:26,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:26,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:56:26,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:56:26,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 12:56:27,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:56:27,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:56:27,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:56:27,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:56:27,074 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:56:27,076 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 12:56:27,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eada9e3a4/38fa998768be4c078cab36ea8be05efb/FLAG8163c4f0b [2020-07-21 12:56:27,610 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:56:27,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 12:56:27,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eada9e3a4/38fa998768be4c078cab36ea8be05efb/FLAG8163c4f0b [2020-07-21 12:56:28,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eada9e3a4/38fa998768be4c078cab36ea8be05efb [2020-07-21 12:56:28,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:56:28,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:56:28,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:28,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:56:28,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:56:28,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204f065a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28, skipping insertion in model container [2020-07-21 12:56:28,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:56:28,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:56:28,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:28,225 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:56:28,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:56:28,250 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:56:28,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28 WrapperNode [2020-07-21 12:56:28,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:56:28,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:56:28,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:56:28,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:56:28,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... [2020-07-21 12:56:28,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:56:28,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:56:28,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:56:28,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:56:28,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:56:28,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:56:28,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:56:28,437 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 12:56:28,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:56:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:56:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:56:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 12:56:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:56:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:56:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:56:28,643 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:56:28,643 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:56:28,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:28 BoogieIcfgContainer [2020-07-21 12:56:28,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:56:28,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:56:28,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:56:28,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:56:28,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:56:28" (1/3) ... [2020-07-21 12:56:28,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8c0392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:28, skipping insertion in model container [2020-07-21 12:56:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:56:28" (2/3) ... [2020-07-21 12:56:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8c0392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:56:28, skipping insertion in model container [2020-07-21 12:56:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:56:28" (3/3) ... [2020-07-21 12:56:28,660 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-21 12:56:28,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:56:28,683 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:56:28,697 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:56:28,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:56:28,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:56:28,728 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:56:28,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:56:28,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:56:28,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:56:28,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:56:28,728 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:56:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 12:56:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:56:28,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:28,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:28,755 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 12:56:28,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:28,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671504225] [2020-07-21 12:56:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:28,829 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:28,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:56:28,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:28,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671504225] [2020-07-21 12:56:28,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:28,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:56:28,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606977830] [2020-07-21 12:56:28,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:56:28,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:28,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:56:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:28,999 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-21 12:56:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:29,173 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 12:56:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:29,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-21 12:56:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:29,187 INFO L225 Difference]: With dead ends: 36 [2020-07-21 12:56:29,187 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 12:56:29,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:56:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 12:56:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 12:56:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:56:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 12:56:29,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 12:56:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:29,242 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 12:56:29,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:56:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 12:56:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 12:56:29,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:29,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:29,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,461 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 12:56:29,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:29,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329796428] [2020-07-21 12:56:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:56:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:56:29,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:29,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329796428] [2020-07-21 12:56:29,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:29,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:56:29,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956666347] [2020-07-21 12:56:29,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:56:29,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:56:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:29,556 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-21 12:56:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:29,648 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 12:56:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:29,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 12:56:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:29,651 INFO L225 Difference]: With dead ends: 28 [2020-07-21 12:56:29,651 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 12:56:29,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:56:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 12:56:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 12:56:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:56:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 12:56:29,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 12:56:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:29,660 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 12:56:29,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:56:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 12:56:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:56:29,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:29,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:29,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,877 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:29,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 12:56:29,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:29,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061045249] [2020-07-21 12:56:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:29,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:29,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:56:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:56:30,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:30,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:30,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:30,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:30,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061045249] [2020-07-21 12:56:30,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:30,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 12:56:30,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661528526] [2020-07-21 12:56:30,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:30,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:30,416 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2020-07-21 12:56:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:30,605 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-21 12:56:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:56:30,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-07-21 12:56:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:30,608 INFO L225 Difference]: With dead ends: 34 [2020-07-21 12:56:30,608 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 12:56:30,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-07-21 12:56:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 12:56:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 12:56:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 12:56:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-07-21 12:56:30,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 27 [2020-07-21 12:56:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:30,619 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-07-21 12:56:30,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-07-21 12:56:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 12:56:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:30,622 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, 1] [2020-07-21 12:56:30,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,835 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-21 12:56:30,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:30,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786645436] [2020-07-21 12:56:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:30,870 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:30,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:30,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:56:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 12:56:30,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:31,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 12:56:31,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786645436] [2020-07-21 12:56:31,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:31,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 12:56:31,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975263365] [2020-07-21 12:56:31,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:31,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:31,329 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 17 states. [2020-07-21 12:56:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:31,599 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-07-21 12:56:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:56:31,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-21 12:56:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:31,602 INFO L225 Difference]: With dead ends: 39 [2020-07-21 12:56:31,602 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 12:56:31,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:56:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 12:56:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 12:56:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:56:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2020-07-21 12:56:31,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 28 [2020-07-21 12:56:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:31,615 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2020-07-21 12:56:31,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2020-07-21 12:56:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 12:56:31,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:31,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:31,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:31,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash -928122994, now seen corresponding path program 2 times [2020-07-21 12:56:31,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:31,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563610744] [2020-07-21 12:56:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:31,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:31,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:56:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:56:31,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:56:32,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563610744] [2020-07-21 12:56:32,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:32,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 12:56:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113890865] [2020-07-21 12:56:32,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:56:32,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:56:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:32,121 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand 11 states. [2020-07-21 12:56:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:32,322 INFO L93 Difference]: Finished difference Result 68 states and 116 transitions. [2020-07-21 12:56:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:32,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 12:56:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:32,325 INFO L225 Difference]: With dead ends: 68 [2020-07-21 12:56:32,325 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 12:56:32,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:56:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 12:56:32,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-07-21 12:56:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 12:56:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-21 12:56:32,351 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 41 [2020-07-21 12:56:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:32,352 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-21 12:56:32,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:56:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-21 12:56:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 12:56:32,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:32,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:32,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,559 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1952548262, now seen corresponding path program 2 times [2020-07-21 12:56:32,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:32,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100369640] [2020-07-21 12:56:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:32,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:56:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 12:56:32,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:56:32,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100369640] [2020-07-21 12:56:32,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:56:32,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 12:56:32,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184546112] [2020-07-21 12:56:32,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:56:32,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:56:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:56:32,642 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 6 states. [2020-07-21 12:56:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:32,714 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-21 12:56:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:56:32,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-07-21 12:56:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:32,716 INFO L225 Difference]: With dead ends: 62 [2020-07-21 12:56:32,717 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 12:56:32,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:56:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 12:56:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 12:56:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 12:56:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-07-21 12:56:32,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 40 [2020-07-21 12:56:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:32,737 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-07-21 12:56:32,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:56:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-07-21 12:56:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 12:56:32,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:32,739 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:32,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,940 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-07-21 12:56:32,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:32,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052018690] [2020-07-21 12:56:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:32,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 12:56:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 12:56:33,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:33,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:33,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 12:56:33,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052018690] [2020-07-21 12:56:33,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:33,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 12:56:33,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536927436] [2020-07-21 12:56:33,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:56:33,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:56:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:56:33,310 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-07-21 12:56:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:33,437 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-21 12:56:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:56:33,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 12:56:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:33,440 INFO L225 Difference]: With dead ends: 57 [2020-07-21 12:56:33,440 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 12:56:33,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 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 12:56:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 12:56:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 12:56:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 12:56:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 12:56:33,447 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2020-07-21 12:56:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:33,448 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 12:56:33,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:56:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 12:56:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 12:56:33,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:33,450 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:33,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:33,664 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-07-21 12:56:33,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:33,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570383048] [2020-07-21 12:56:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:33,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:33,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:33,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 12:56:33,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 12:56:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:34,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 12:56:34,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570383048] [2020-07-21 12:56:34,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:34,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-07-21 12:56:34,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527398332] [2020-07-21 12:56:34,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 12:56:34,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:34,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 12:56:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-07-21 12:56:34,507 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 23 states. [2020-07-21 12:56:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:34,881 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-07-21 12:56:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 12:56:34,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-07-21 12:56:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:34,885 INFO L225 Difference]: With dead ends: 51 [2020-07-21 12:56:34,885 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 12:56:34,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 12:56:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 12:56:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-21 12:56:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 12:56:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2020-07-21 12:56:34,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 42 [2020-07-21 12:56:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:34,896 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2020-07-21 12:56:34,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 12:56:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2020-07-21 12:56:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 12:56:34,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:34,898 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 12:56:35,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:35,101 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1434057987, now seen corresponding path program 5 times [2020-07-21 12:56:35,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:35,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114528493] [2020-07-21 12:56:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:35,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:35,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:56:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-07-21 12:56:35,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:35,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-07-21 12:56:35,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114528493] [2020-07-21 12:56:35,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:35,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 12:56:35,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536863423] [2020-07-21 12:56:35,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:56:35,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:35,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:56:35,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:56:35,699 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 13 states. [2020-07-21 12:56:35,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:35,932 INFO L93 Difference]: Finished difference Result 88 states and 136 transitions. [2020-07-21 12:56:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:56:35,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-07-21 12:56:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:35,934 INFO L225 Difference]: With dead ends: 88 [2020-07-21 12:56:35,934 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 12:56:35,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 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 12:56:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 12:56:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-07-21 12:56:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 12:56:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-07-21 12:56:35,956 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 83 [2020-07-21 12:56:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:35,957 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-07-21 12:56:35,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:56:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-07-21 12:56:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 12:56:35,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:35,962 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:36,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:36,163 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-07-21 12:56:36,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:36,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049911403] [2020-07-21 12:56:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:36,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:56:36,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-21 12:56:36,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:36,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:36,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-21 12:56:37,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049911403] [2020-07-21 12:56:37,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:37,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 12:56:37,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428085559] [2020-07-21 12:56:37,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:56:37,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:56:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:56:37,191 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 17 states. [2020-07-21 12:56:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:37,575 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2020-07-21 12:56:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 12:56:37,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-07-21 12:56:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:37,579 INFO L225 Difference]: With dead ends: 106 [2020-07-21 12:56:37,579 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 12:56:37,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 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 12:56:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 12:56:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-07-21 12:56:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 12:56:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2020-07-21 12:56:37,592 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 97 [2020-07-21 12:56:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:37,592 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2020-07-21 12:56:37,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:56:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2020-07-21 12:56:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 12:56:37,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:37,594 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:37,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:37,804 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -680629368, now seen corresponding path program 7 times [2020-07-21 12:56:37,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:37,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462897773] [2020-07-21 12:56:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:37,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:56:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 276 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-07-21 12:56:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:38,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:38,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 306 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 12:56:39,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462897773] [2020-07-21 12:56:39,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:39,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 12:56:39,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612389228] [2020-07-21 12:56:39,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 12:56:39,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 12:56:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 12:56:39,380 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand 21 states. [2020-07-21 12:56:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:39,938 INFO L93 Difference]: Finished difference Result 130 states and 222 transitions. [2020-07-21 12:56:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 12:56:39,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 124 [2020-07-21 12:56:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:39,943 INFO L225 Difference]: With dead ends: 130 [2020-07-21 12:56:39,943 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 12:56:39,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 211 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:56:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 12:56:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-07-21 12:56:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 12:56:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-07-21 12:56:39,956 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 124 [2020-07-21 12:56:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:39,956 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-07-21 12:56:39,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 12:56:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-07-21 12:56:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-21 12:56:39,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:39,959 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:40,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:40,175 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:40,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1288458278, now seen corresponding path program 8 times [2020-07-21 12:56:40,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:40,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593758686] [2020-07-21 12:56:40,177 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 12:56:40,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 12:56:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 730 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-07-21 12:56:40,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:41,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:41,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 782 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2020-07-21 12:56:42,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593758686] [2020-07-21 12:56:42,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:42,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 12:56:42,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252524025] [2020-07-21 12:56:42,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 12:56:42,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 12:56:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 12:56:42,800 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 25 states. [2020-07-21 12:56:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:43,601 INFO L93 Difference]: Finished difference Result 157 states and 259 transitions. [2020-07-21 12:56:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 12:56:43,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 205 [2020-07-21 12:56:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:43,604 INFO L225 Difference]: With dead ends: 157 [2020-07-21 12:56:43,605 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 12:56:43,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 365 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 12:56:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 12:56:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-07-21 12:56:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 12:56:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2020-07-21 12:56:43,618 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 205 [2020-07-21 12:56:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:43,619 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2020-07-21 12:56:43,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 12:56:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2020-07-21 12:56:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 12:56:43,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:56:43,621 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:56:43,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:43,836 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:56:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:56:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 9 times [2020-07-21 12:56:43,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:56:43,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043205421] [2020-07-21 12:56:43,838 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 12:56:43,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:56:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:56:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-21 12:56:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:56:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-21 12:56:44,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:56:45,338 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 12:56:45,459 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 12:56:45,591 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:56:45,725 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:56:46,363 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 12:56:46,613 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 12:56:46,871 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 12:56:47,127 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 12:56:49,335 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 12:56:49,459 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 12:56:49,595 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:56:49,729 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 12:56:50,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:50,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:50,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:51,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:51,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:52,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:56:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-21 12:56:53,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043205421] [2020-07-21 12:56:53,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:56:53,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48 [2020-07-21 12:56:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014840182] [2020-07-21 12:56:53,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 12:56:53,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:56:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 12:56:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 12:56:53,304 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand 48 states. [2020-07-21 12:56:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:56:54,355 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2020-07-21 12:56:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 12:56:54,356 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178 [2020-07-21 12:56:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:56:54,357 INFO L225 Difference]: With dead ends: 90 [2020-07-21 12:56:54,358 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:56:54,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 268 SyntacticMatches, 41 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=658, Invalid=4034, Unknown=0, NotChecked=0, Total=4692 [2020-07-21 12:56:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:56:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:56:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:56:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:56:54,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2020-07-21 12:56:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:56:54,361 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:56:54,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 12:56:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:56:54,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:56:54,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:56:54,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:56:55,430 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 19 [2020-07-21 12:56:55,434 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:56:55,435 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 12:56:55,435 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 12:56:55,435 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 12:56:55,436 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (or (and (<= 2 |fibonacci_#t~ret0|) (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 5))) (<= |fibonacci_#in~n| 3)) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 12:56:55,436 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 12:56:55,436 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 12:56:55,436 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 12:56:55,436 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 12:56:55,436 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:56:55,436 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:55,437 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:56:55,437 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:56:55,437 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:56:55,437 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:56:55,437 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 12:56:55,437 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 12:56:55,438 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 12:56:55,438 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 12:56:55,438 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 12:56:55,438 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 12:56:55,438 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 12:56:55,438 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 12:56:55,438 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 12:56:55,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:56:55 BoogieIcfgContainer [2020-07-21 12:56:55,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:56:55,448 INFO L168 Benchmark]: Toolchain (without parser) took 27428.10 ms. Allocated memory was 145.2 MB in the beginning and 425.2 MB in the end (delta: 280.0 MB). Free memory was 102.8 MB in the beginning and 258.6 MB in the end (delta: -155.8 MB). Peak memory consumption was 124.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:55,448 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 145.2 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 12:56:55,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.96 ms. Allocated memory is still 145.2 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:55,450 INFO L168 Benchmark]: Boogie Preprocessor took 23.69 ms. Allocated memory is still 145.2 MB. Free memory was 93.2 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:55,450 INFO L168 Benchmark]: RCFGBuilder took 373.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 168.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:55,451 INFO L168 Benchmark]: TraceAbstraction took 26794.40 ms. Allocated memory was 202.4 MB in the beginning and 425.2 MB in the end (delta: 222.8 MB). Free memory was 168.9 MB in the beginning and 258.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 133.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:56:55,454 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 145.2 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.96 ms. Allocated memory is still 145.2 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.69 ms. Allocated memory is still 145.2 MB. Free memory was 93.2 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.73 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 168.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26794.40 ms. Allocated memory was 202.4 MB in the beginning and 425.2 MB in the end (delta: 222.8 MB). Free memory was 168.9 MB in the beginning and 258.6 MB in the end (delta: -89.8 MB). Peak memory consumption was 133.1 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: 25.8s, OverallIterations: 13, TraceHistogramMax: 29, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 932 SDslu, 1278 SDs, 0 SdLazy, 2260 SolverSat, 1144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1912 GetRequests, 1478 SyntacticMatches, 127 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 45 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 167 PreInvPairs, 212 NumberOfFragments, 42 HoareAnnotationTreeSize, 167 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1548 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 935 NumberOfCodeBlocks, 935 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1778 ConstructedInterpolants, 0 QuantifiedInterpolants, 542826 SizeOfPredicates, 78 NumberOfNonLiveVariables, 2113 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 7013/11113 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...