/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:47:45,611 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:47:45,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:47:45,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:47:45,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:47:45,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:47:45,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:47:45,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:47:45,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:47:45,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:47:45,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:47:45,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:47:45,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:47:45,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:47:45,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:47:45,668 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 00:47:45,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:47:45,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:47:45,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:47:45,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:47:45,685 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:47:45,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:47:45,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:47:45,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:47:45,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:47:45,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:47:45,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:47:45,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:47:45,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:47:45,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:47:45,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:47:45,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:47:45,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:47:45,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:47:45,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:47:45,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:47:45,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:47:45,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:47:45,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:47:45,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:47:45,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:47:45,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:47:45,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:45,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:47:45,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:47:45,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:47:45,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:47:45,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:47:45,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:47:45,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:47:45,979 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:47:45,980 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 00:47:46,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad37eba43/e63b5c304109493799b7f0d12792ce9d/FLAGe72d962a5 [2020-07-21 00:47:46,543 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:47:46,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 00:47:46,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad37eba43/e63b5c304109493799b7f0d12792ce9d/FLAGe72d962a5 [2020-07-21 00:47:46,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad37eba43/e63b5c304109493799b7f0d12792ce9d [2020-07-21 00:47:46,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:47:46,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:47:46,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:47:46,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:47:46,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:47:46,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:47:46" (1/1) ... [2020-07-21 00:47:46,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f34150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:46, skipping insertion in model container [2020-07-21 00:47:46,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:47:46" (1/1) ... [2020-07-21 00:47:46,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:47:46,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:47:47,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:47:47,172 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:47:47,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:47:47,205 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:47:47,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47 WrapperNode [2020-07-21 00:47:47,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:47:47,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:47:47,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:47:47,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:47:47,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (1/1) ... [2020-07-21 00:47:47,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:47:47,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:47:47,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:47:47,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:47:47,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (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 00:47:47,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:47:47,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:47:47,384 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 00:47:47,384 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 00:47:47,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:47:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:47:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:47:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 00:47:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 00:47:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:47:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:47:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:47:47,619 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:47:47,619 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:47:47,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:47:47 BoogieIcfgContainer [2020-07-21 00:47:47,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:47:47,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:47:47,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:47:47,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:47:47,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:47:46" (1/3) ... [2020-07-21 00:47:47,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fd97af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:47:47, skipping insertion in model container [2020-07-21 00:47:47,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:47:47" (2/3) ... [2020-07-21 00:47:47,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fd97af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:47:47, skipping insertion in model container [2020-07-21 00:47:47,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:47:47" (3/3) ... [2020-07-21 00:47:47,635 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-21 00:47:47,648 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:47:47,658 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:47:47,676 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:47:47,708 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:47:47,708 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:47:47,708 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:47:47,708 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:47:47,709 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:47:47,709 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:47:47,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:47:47,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:47:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 00:47:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:47:47,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:47,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:47,751 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 00:47:47,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:47,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191581301] [2020-07-21 00:47:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:47,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:47,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:47:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:47,937 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 00:47:47,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:47:47,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191581301] [2020-07-21 00:47:47,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:47:47,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:47:47,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587172393] [2020-07-21 00:47:47,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:47:47,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:47:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:47:47,965 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 00:47:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:48,075 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 00:47:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:47:48,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:47:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:48,089 INFO L225 Difference]: With dead ends: 44 [2020-07-21 00:47:48,089 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 00:47:48,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:47:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 00:47:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 00:47:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:47:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:47:48,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 00:47:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:48,147 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:47:48,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:47:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:47:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:47:48,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:48,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:48,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:48,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 00:47:48,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:48,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036859097] [2020-07-21 00:47:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:48,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:47:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:47:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:48,448 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 00:47:48,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:47:48,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036859097] [2020-07-21 00:47:48,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:47:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:47:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79025414] [2020-07-21 00:47:48,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:47:48,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:48,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:47:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:47:48,453 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 00:47:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:48,523 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 00:47:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:47:48,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:47:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:48,525 INFO L225 Difference]: With dead ends: 36 [2020-07-21 00:47:48,525 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 00:47:48,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:47:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 00:47:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 00:47:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 00:47:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 00:47:48,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 00:47:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:48,538 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 00:47:48,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:47:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 00:47:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:47:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:48,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:48,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:48,756 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 00:47:48,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:48,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909559467] [2020-07-21 00:47:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:48,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:47:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:47:48,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:49,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:47:49,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909559467] [2020-07-21 00:47:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:49,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:47:49,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856838525] [2020-07-21 00:47:49,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:47:49,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:49,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:47:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:47:49,210 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 00:47:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:49,360 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 00:47:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:47:49,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 00:47:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:49,364 INFO L225 Difference]: With dead ends: 41 [2020-07-21 00:47:49,364 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 00:47:49,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:47:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 00:47:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 00:47:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:47:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:47:49,376 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 00:47:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:49,377 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:47:49,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:47:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:47:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:47:49,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:49,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:49,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:49,594 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 00:47:49,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:49,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79933222] [2020-07-21 00:47:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:49,633 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:47:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:47:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:49,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 00:47:49,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79933222] [2020-07-21 00:47:49,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:49,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 00:47:49,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005813351] [2020-07-21 00:47:49,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 00:47:49,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 00:47:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 00:47:49,890 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 00:47:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:50,045 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 00:47:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:47:50,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 00:47:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:50,048 INFO L225 Difference]: With dead ends: 46 [2020-07-21 00:47:50,048 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 00:47:50,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:47:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 00:47:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 00:47:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 00:47:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 00:47:50,059 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 00:47:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:50,060 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 00:47:50,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 00:47:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 00:47:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:47:50,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:50,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:50,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:50,276 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 00:47:50,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:50,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136099376] [2020-07-21 00:47:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:50,313 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:47:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:47:50,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:50,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:47:50,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136099376] [2020-07-21 00:47:50,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:50,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 00:47:50,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333757590] [2020-07-21 00:47:50,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 00:47:50,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 00:47:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 00:47:50,748 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 00:47:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:50,936 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 00:47:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:47:50,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 00:47:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:50,938 INFO L225 Difference]: With dead ends: 51 [2020-07-21 00:47:50,938 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 00:47:50,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:47:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 00:47:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 00:47:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:47:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:47:50,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 00:47:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:50,950 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:47:50,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 00:47:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:47:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 00:47:50,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:50,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:51,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:51,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 00:47:51,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:51,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051261557] [2020-07-21 00:47:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:51,193 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:47:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 00:47:51,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:51,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:51,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:51,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:47:51,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051261557] [2020-07-21 00:47:51,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:51,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:47:51,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307153654] [2020-07-21 00:47:51,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:47:51,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:47:51,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:47:51,552 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-21 00:47:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:51,717 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 00:47:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:47:51,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 00:47:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:51,720 INFO L225 Difference]: With dead ends: 56 [2020-07-21 00:47:51,720 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 00:47:51,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:47:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 00:47:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 00:47:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 00:47:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 00:47:51,742 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 00:47:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:51,742 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 00:47:51,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:47:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 00:47:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 00:47:51,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:51,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:51,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:51,962 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:51,962 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 00:47:51,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:51,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954056599] [2020-07-21 00:47:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:52,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:47:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 00:47:52,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:52,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:52,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:52,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:52,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 00:47:52,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954056599] [2020-07-21 00:47:52,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:52,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:47:52,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397022485] [2020-07-21 00:47:52,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:47:52,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:47:52,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:47:52,629 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-21 00:47:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:52,837 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 00:47:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:47:52,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-21 00:47:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:52,840 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:47:52,840 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:47:52,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:47:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:47:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 00:47:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 00:47:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 00:47:52,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 00:47:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:52,853 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 00:47:52,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:47:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 00:47:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 00:47:52,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:52,856 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:53,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:53,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 00:47:53,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:53,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347194264] [2020-07-21 00:47:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:53,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:47:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:47:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 00:47:53,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:53,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 00:47:53,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347194264] [2020-07-21 00:47:53,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:53,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:47:53,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834898177] [2020-07-21 00:47:53,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:47:53,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:47:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:47:53,514 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-21 00:47:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:53,685 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-21 00:47:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:47:53,685 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-21 00:47:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:53,687 INFO L225 Difference]: With dead ends: 69 [2020-07-21 00:47:53,689 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 00:47:53,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:47:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 00:47:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-21 00:47:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 00:47:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-21 00:47:53,719 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-21 00:47:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:53,720 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-21 00:47:53,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:47:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-21 00:47:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 00:47:53,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:53,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:53,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:53,942 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-21 00:47:53,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:53,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608552968] [2020-07-21 00:47:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:53,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:47:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:47:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 00:47:54,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:54,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 00:47:54,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608552968] [2020-07-21 00:47:54,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:54,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 00:47:54,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070757479] [2020-07-21 00:47:54,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:47:54,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:47:54,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:47:54,238 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-21 00:47:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:54,376 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-21 00:47:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:47:54,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-21 00:47:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:54,378 INFO L225 Difference]: With dead ends: 61 [2020-07-21 00:47:54,378 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 00:47:54,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:47:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 00:47:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-21 00:47:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 00:47:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-21 00:47:54,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-21 00:47:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:54,405 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-21 00:47:54,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:47:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-21 00:47:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 00:47:54,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:54,408 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:54,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:54,612 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-21 00:47:54,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:54,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604717383] [2020-07-21 00:47:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:54,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:47:54,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:47:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 00:47:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:54,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:55,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:55,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 00:47:55,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604717383] [2020-07-21 00:47:55,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:55,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:47:55,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937767814] [2020-07-21 00:47:55,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:47:55,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:47:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:47:55,084 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-21 00:47:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:55,222 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-21 00:47:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:47:55,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-21 00:47:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:55,224 INFO L225 Difference]: With dead ends: 66 [2020-07-21 00:47:55,225 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 00:47:55,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:47:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 00:47:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-21 00:47:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 00:47:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 00:47:55,235 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-21 00:47:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:55,235 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 00:47:55,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:47:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 00:47:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 00:47:55,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:55,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:55,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:55,451 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:55,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-21 00:47:55,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:55,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615583531] [2020-07-21 00:47:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:55,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:47:55,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 00:47:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 00:47:55,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 00:47:56,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615583531] [2020-07-21 00:47:56,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:56,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-21 00:47:56,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59948131] [2020-07-21 00:47:56,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 00:47:56,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 00:47:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:47:56,108 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-21 00:47:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:56,330 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-21 00:47:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 00:47:56,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-21 00:47:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:56,334 INFO L225 Difference]: With dead ends: 94 [2020-07-21 00:47:56,334 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 00:47:56,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:47:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 00:47:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-21 00:47:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 00:47:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-21 00:47:56,369 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-21 00:47:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:56,372 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-21 00:47:56,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 00:47:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-21 00:47:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 00:47:56,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:56,377 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:56,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:56,593 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:56,594 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-21 00:47:56,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:56,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994562327] [2020-07-21 00:47:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:56,656 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:47:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:47:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 00:47:56,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:57,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 00:47:57,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994562327] [2020-07-21 00:47:57,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:57,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:47:57,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253620643] [2020-07-21 00:47:57,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:47:57,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:57,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:47:57,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:47:57,250 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-21 00:47:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:57,430 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-21 00:47:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:47:57,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 00:47:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:57,434 INFO L225 Difference]: With dead ends: 100 [2020-07-21 00:47:57,434 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 00:47:57,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:47:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 00:47:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 00:47:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 00:47:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 00:47:57,463 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-21 00:47:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:57,463 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 00:47:57,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:47:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 00:47:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 00:47:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:57,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:57,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:57,680 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-21 00:47:57,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:57,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24862464] [2020-07-21 00:47:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:47:57,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:47:57,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:47:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 00:47:57,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:57,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-21 00:47:58,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24862464] [2020-07-21 00:47:58,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:58,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 00:47:58,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318511889] [2020-07-21 00:47:58,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:47:58,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:58,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:47:58,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:47:58,134 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-21 00:47:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:58,288 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-21 00:47:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:47:58,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-21 00:47:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:58,292 INFO L225 Difference]: With dead ends: 100 [2020-07-21 00:47:58,292 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 00:47:58,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:47:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 00:47:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 00:47:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 00:47:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 00:47:58,304 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-21 00:47:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:58,304 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 00:47:58,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:47:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 00:47:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 00:47:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:58,306 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:58,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:58,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-21 00:47:58,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:58,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185333200] [2020-07-21 00:47:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:58,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:47:58,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:58,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:47:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 00:47:58,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:58,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:58,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:59,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:47:59,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185333200] [2020-07-21 00:47:59,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:47:59,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 00:47:59,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942308250] [2020-07-21 00:47:59,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:47:59,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:47:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:47:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:47:59,072 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-21 00:47:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:47:59,277 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-21 00:47:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:47:59,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 00:47:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:47:59,283 INFO L225 Difference]: With dead ends: 97 [2020-07-21 00:47:59,283 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:47:59,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:47:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:47:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-21 00:47:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 00:47:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-21 00:47:59,298 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-21 00:47:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:47:59,299 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-21 00:47:59,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:47:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-21 00:47:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 00:47:59,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:47:59,301 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:47:59,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:59,515 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:47:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:47:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-21 00:47:59,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:47:59,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610355537] [2020-07-21 00:47:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:47:59,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:47:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:47:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:47:59,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:47:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 00:47:59,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:47:59,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:47:59,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 00:48:00,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610355537] [2020-07-21 00:48:00,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:00,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 00:48:00,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216807810] [2020-07-21 00:48:00,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:00,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:00,157 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-21 00:48:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:00,362 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-21 00:48:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:00,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-21 00:48:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:00,364 INFO L225 Difference]: With dead ends: 97 [2020-07-21 00:48:00,364 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 00:48:00,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:48:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 00:48:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 00:48:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 00:48:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-21 00:48:00,379 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-21 00:48:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:00,380 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-21 00:48:00,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-21 00:48:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 00:48:00,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:00,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:00,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:00,597 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-21 00:48:00,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:00,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533025893] [2020-07-21 00:48:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:00,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:00,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 00:48:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 00:48:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:01,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:01,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:01,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:01,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:48:01,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533025893] [2020-07-21 00:48:01,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:01,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 00:48:01,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095684701] [2020-07-21 00:48:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:48:01,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:48:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:48:01,235 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-21 00:48:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:01,419 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-21 00:48:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:48:01,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 00:48:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:01,425 INFO L225 Difference]: With dead ends: 86 [2020-07-21 00:48:01,426 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 00:48:01,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:48:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 00:48:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 00:48:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 00:48:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 00:48:01,434 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-21 00:48:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:01,434 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 00:48:01,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:48:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 00:48:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 00:48:01,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:48:01,437 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:48:01,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:01,651 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:48:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:48:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 00:48:01,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:48:01,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38303938] [2020-07-21 00:48:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:01,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:48:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:48:01,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:48:01,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:48:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-21 00:48:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:48:02,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:02,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:02,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:02,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:48:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 00:48:02,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38303938] [2020-07-21 00:48:02,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:48:02,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 00:48:02,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373860452] [2020-07-21 00:48:02,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:48:02,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:48:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:48:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:48:02,497 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-21 00:48:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:48:02,699 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-21 00:48:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:48:02,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-21 00:48:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:48:02,700 INFO L225 Difference]: With dead ends: 89 [2020-07-21 00:48:02,700 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:48:02,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:48:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:48:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:48:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:48:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:48:02,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-21 00:48:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:48:02,703 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:48:02,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:48:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:48:02,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:48:02,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:48:02,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:48:03,813 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-21 00:48:04,169 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-21 00:48:04,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:48:04,173 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:48:04,173 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 00:48:04,173 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:48:04,173 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 00:48:04,174 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 00:48:04,174 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:48:04,174 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-21 00:48:04,174 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 00:48:04,174 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 00:48:04,174 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 00:48:04,174 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 00:48:04,175 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (and (= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (<= 4 |fibo2_#in~n|)) (<= |fibo2_#in~n| fibo2_~n)) [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:48:04,175 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 00:48:04,176 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 00:48:04,176 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 00:48:04,176 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 00:48:04,176 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (= 2 |fibo1_#t~ret0|) .cse1) (and .cse1 (<= |fibo1_#in~n| 3)) (and (<= 5 |fibo1_#in~n|) .cse1)))) [2020-07-21 00:48:04,176 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:48:04,176 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 00:48:04,176 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 00:48:04,177 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 00:48:04,177 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 00:48:04,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:48:04 BoogieIcfgContainer [2020-07-21 00:48:04,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:48:04,186 INFO L168 Benchmark]: Toolchain (without parser) took 17246.77 ms. Allocated memory was 138.4 MB in the beginning and 367.0 MB in the end (delta: 228.6 MB). Free memory was 103.3 MB in the beginning and 306.3 MB in the end (delta: -203.0 MB). Peak memory consumption was 213.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,187 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.35 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,188 INFO L168 Benchmark]: Boogie Preprocessor took 106.51 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,189 INFO L168 Benchmark]: RCFGBuilder took 313.17 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 167.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,189 INFO L168 Benchmark]: TraceAbstraction took 16556.89 ms. Allocated memory was 201.9 MB in the beginning and 367.0 MB in the end (delta: 165.2 MB). Free memory was 166.7 MB in the beginning and 306.3 MB in the end (delta: -139.7 MB). Peak memory consumption was 213.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:48:04,192 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.35 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.51 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.17 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 167.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16556.89 ms. Allocated memory was 201.9 MB in the beginning and 367.0 MB in the end (delta: 165.2 MB). Free memory was 166.7 MB in the beginning and 306.3 MB in the end (delta: -139.7 MB). Peak memory consumption was 213.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.2s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 435 SDslu, 2603 SDs, 0 SdLazy, 2048 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 71 PreInvPairs, 292 NumberOfFragments, 92 HoareAnnotationTreeSize, 71 FomulaSimplifications, 103936 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 915 NumberOfCodeBlocks, 638 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 231460 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1436 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1521/2030 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...