/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:29:30,679 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 16:29:30,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:29:30,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:29:30,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:29:30,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:29:30,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:29:30,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:29:30,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:29:30,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:29:30,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:29:30,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:29:30,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:29:30,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:29:30,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:29:30,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:29:30,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:29:30,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:29:30,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:29:30,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:29:30,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:29:30,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:29:30,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:29:30,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:29:30,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:29:30,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:29:30,748 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 [2020-07-20 16:29:30,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:29:30,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:29:30,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:29:30,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:29:30,763 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:29:30,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:29:30,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:29:30,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:29:30,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:29:30,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:29:30,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:29:30,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:29:30,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:29:30,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:29:30,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:29:30,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:29:30,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:29:30,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:29:30,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:29:30,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:29:30,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:29:30,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:29:30,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:29:30,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:29:30,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:29:30,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:29:30,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:30,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:29:30,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:29:30,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:29:31,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:29:31,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:29:31,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:29:31,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:29:31,094 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:29:31,095 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 16:29:31,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6d69e0c/4ce7398f8c864451a1ef34c4e2931e42/FLAG3c1aa5f38 [2020-07-20 16:29:31,546 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:29:31,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 16:29:31,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6d69e0c/4ce7398f8c864451a1ef34c4e2931e42/FLAG3c1aa5f38 [2020-07-20 16:29:31,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6d69e0c/4ce7398f8c864451a1ef34c4e2931e42 [2020-07-20 16:29:31,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:29:31,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:29:31,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:31,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:29:31,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:29:31,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:31" (1/1) ... [2020-07-20 16:29:31,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd1c41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:31, skipping insertion in model container [2020-07-20 16:29:31,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:29:31" (1/1) ... [2020-07-20 16:29:32,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:29:32,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:29:32,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:32,266 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:29:32,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:29:32,302 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:29:32,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32 WrapperNode [2020-07-20 16:29:32,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:29:32,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:29:32,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:29:32,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:29:32,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (1/1) ... [2020-07-20 16:29:32,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:29:32,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:29:32,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:29:32,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:29:32,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (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 [2020-07-20 16:29:32,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:29:32,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:29:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 16:29:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:29:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:29:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:29:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 16:29:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:29:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:29:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:29:32,660 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:29:32,661 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:29:32,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:32 BoogieIcfgContainer [2020-07-20 16:29:32,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:29:32,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:29:32,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:29:32,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:29:32,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:29:31" (1/3) ... [2020-07-20 16:29:32,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6828e0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:32, skipping insertion in model container [2020-07-20 16:29:32,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:29:32" (2/3) ... [2020-07-20 16:29:32,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6828e0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:29:32, skipping insertion in model container [2020-07-20 16:29:32,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:29:32" (3/3) ... [2020-07-20 16:29:32,674 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-20 16:29:32,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:29:32,692 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:29:32,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:29:32,747 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:29:32,747 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:29:32,748 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:29:32,748 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:29:32,748 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:29:32,748 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:29:32,749 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:29:32,749 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:29:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 16:29:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:29:32,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:32,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:32,785 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-20 16:29:32,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:32,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425557453] [2020-07-20 16:29:32,805 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 [2020-07-20 16:29:32,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:29:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:32,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:32,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425557453] [2020-07-20 16:29:32,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:32,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:29:32,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242103742] [2020-07-20 16:29:32,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:29:32,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:29:32,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:29:32,995 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 16:29:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:33,107 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-20 16:29:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:29:33,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 16:29:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:33,121 INFO L225 Difference]: With dead ends: 33 [2020-07-20 16:29:33,121 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 16:29:33,125 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 [2020-07-20 16:29:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 16:29:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 16:29:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:29:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:29:33,222 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 16:29:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:33,223 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:29:33,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:29:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:29:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 16:29:33,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:33,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:33,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:33,441 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-20 16:29:33,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:33,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326240934] [2020-07-20 16:29:33,444 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 [2020-07-20 16:29:33,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:29:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:29:33,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:29:33,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326240934] [2020-07-20 16:29:33,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:29:33,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:29:33,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571940901] [2020-07-20 16:29:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:29:33,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:29:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:29:33,515 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 16:29:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:33,584 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 16:29:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:29:33,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 16:29:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:33,587 INFO L225 Difference]: With dead ends: 27 [2020-07-20 16:29:33,589 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 16:29:33,590 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 [2020-07-20 16:29:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 16:29:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 16:29:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:29:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 16:29:33,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 16:29:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:33,599 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 16:29:33,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:29:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 16:29:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:29:33,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:33,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:33,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:33,816 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:33,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-20 16:29:33,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:33,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298196686] [2020-07-20 16:29:33,819 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 [2020-07-20 16:29:33,854 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:29:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 16:29:33,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:34,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:34,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:29:34,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298196686] [2020-07-20 16:29:34,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:34,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:29:34,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602888940] [2020-07-20 16:29:34,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:29:34,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:29:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:29:34,104 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 16:29:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:34,203 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 16:29:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:29:34,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 16:29:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:34,206 INFO L225 Difference]: With dead ends: 32 [2020-07-20 16:29:34,206 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:29:34,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:29:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 16:29:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:29:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:29:34,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 16:29:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:34,217 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:29:34,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:29:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:29:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 16:29:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:34,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:34,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:34,435 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-20 16:29:34,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:34,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671758390] [2020-07-20 16:29:34,437 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 [2020-07-20 16:29:34,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:29:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 16:29:34,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:34,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:29:34,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671758390] [2020-07-20 16:29:34,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:34,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:29:34,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810116538] [2020-07-20 16:29:34,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:29:34,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:29:34,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:29:34,676 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 16:29:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:34,750 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 16:29:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:29:34,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 16:29:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:34,753 INFO L225 Difference]: With dead ends: 37 [2020-07-20 16:29:34,754 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 16:29:34,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 16:29:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 16:29:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 16:29:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 16:29:34,763 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 16:29:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:34,764 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 16:29:34,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:29:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 16:29:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 16:29:34,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:34,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:34,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:34,981 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-20 16:29:34,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:34,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395364595] [2020-07-20 16:29:34,982 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 [2020-07-20 16:29:35,015 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:35,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:29:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:29:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:35,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:35,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:29:35,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395364595] [2020-07-20 16:29:35,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:35,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:29:35,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957218303] [2020-07-20 16:29:35,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:29:35,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:29:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:35,426 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 16:29:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:35,579 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 16:29:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:29:35,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 16:29:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:35,585 INFO L225 Difference]: With dead ends: 42 [2020-07-20 16:29:35,585 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 16:29:35,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:29:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 16:29:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 16:29:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:29:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:29:35,596 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 16:29:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:35,597 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:29:35,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:29:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:29:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 16:29:35,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:35,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:35,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:35,816 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-20 16:29:35,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:35,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367938720] [2020-07-20 16:29:35,817 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 [2020-07-20 16:29:35,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:29:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 16:29:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:36,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:36,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:29:36,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367938720] [2020-07-20 16:29:36,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:36,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:29:36,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930048136] [2020-07-20 16:29:36,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:29:36,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:29:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:29:36,202 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 16:29:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:36,339 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 16:29:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:29:36,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 16:29:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:36,343 INFO L225 Difference]: With dead ends: 47 [2020-07-20 16:29:36,343 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 16:29:36,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:29:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 16:29:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 16:29:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 16:29:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 16:29:36,355 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 16:29:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:36,355 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 16:29:36,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:29:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 16:29:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:29:36,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:36,358 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:36,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:36,561 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-20 16:29:36,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:36,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652419034] [2020-07-20 16:29:36,564 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 [2020-07-20 16:29:36,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:36,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:29:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 16:29:36,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:37,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 16:29:37,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652419034] [2020-07-20 16:29:37,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:37,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:29:37,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687283103] [2020-07-20 16:29:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:29:37,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:29:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:29:37,255 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 16:29:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:37,435 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 16:29:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:29:37,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 16:29:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:37,438 INFO L225 Difference]: With dead ends: 52 [2020-07-20 16:29:37,439 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 16:29:37,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 16:29:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 16:29:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 16:29:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 16:29:37,464 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 16:29:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:37,469 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 16:29:37,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:29:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 16:29:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 16:29:37,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:37,475 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:37,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:37,690 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:37,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-20 16:29:37,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:37,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031102164] [2020-07-20 16:29:37,692 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 [2020-07-20 16:29:37,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:29:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 120 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-07-20 16:29:37,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:38,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 134 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-20 16:29:38,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031102164] [2020-07-20 16:29:38,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:38,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 16:29:38,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041854275] [2020-07-20 16:29:38,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:29:38,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:29:38,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:38,631 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 17 states. [2020-07-20 16:29:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:39,051 INFO L93 Difference]: Finished difference Result 79 states and 149 transitions. [2020-07-20 16:29:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 16:29:39,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-20 16:29:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:39,054 INFO L225 Difference]: With dead ends: 79 [2020-07-20 16:29:39,054 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 16:29:39,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:29:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 16:29:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-07-20 16:29:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 16:29:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-07-20 16:29:39,075 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 82 [2020-07-20 16:29:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:39,075 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-07-20 16:29:39,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:29:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-07-20 16:29:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:29:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:39,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:39,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:39,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 4 times [2020-07-20 16:29:39,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:39,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380745402] [2020-07-20 16:29:39,295 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 [2020-07-20 16:29:39,341 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:29:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-20 16:29:39,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:39,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 16:29:39,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380745402] [2020-07-20 16:29:39,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:39,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:29:39,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529291324] [2020-07-20 16:29:39,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:29:39,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:29:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:29:39,933 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 13 states. [2020-07-20 16:29:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:40,077 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-07-20 16:29:40,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:29:40,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-20 16:29:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:40,080 INFO L225 Difference]: With dead ends: 53 [2020-07-20 16:29:40,080 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 16:29:40,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 16:29:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-20 16:29:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 16:29:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-07-20 16:29:40,088 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 68 [2020-07-20 16:29:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:40,089 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-07-20 16:29:40,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:29:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-07-20 16:29:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 16:29:40,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:40,091 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:40,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:40,305 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1558928088, now seen corresponding path program 5 times [2020-07-20 16:29:40,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:40,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102059653] [2020-07-20 16:29:40,307 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 [2020-07-20 16:29:40,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:29:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 276 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-07-20 16:29:40,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:41,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 306 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-20 16:29:41,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102059653] [2020-07-20 16:29:41,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:41,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 16:29:41,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371010563] [2020-07-20 16:29:41,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:29:41,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:41,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:29:41,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:29:41,884 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 21 states. [2020-07-20 16:29:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:42,400 INFO L93 Difference]: Finished difference Result 109 states and 162 transitions. [2020-07-20 16:29:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 16:29:42,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-07-20 16:29:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:42,405 INFO L225 Difference]: With dead ends: 109 [2020-07-20 16:29:42,405 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 16:29:42,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 209 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 16:29:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 16:29:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-20 16:29:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:29:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 16:29:42,418 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 123 [2020-07-20 16:29:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:42,419 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 16:29:42,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:29:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 16:29:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 16:29:42,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:42,421 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:42,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:42,625 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 6 times [2020-07-20 16:29:42,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:42,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786932732] [2020-07-20 16:29:42,627 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 [2020-07-20 16:29:42,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:42,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:42,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:29:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-20 16:29:42,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:43,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-20 16:29:43,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786932732] [2020-07-20 16:29:43,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:43,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 16:29:43,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329401767] [2020-07-20 16:29:43,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 16:29:43,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:43,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 16:29:43,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:29:43,650 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-20 16:29:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:43,822 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-20 16:29:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:29:43,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-20 16:29:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:43,825 INFO L225 Difference]: With dead ends: 68 [2020-07-20 16:29:43,825 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:29:43,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:29:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:29:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-20 16:29:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 16:29:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 16:29:43,835 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-20 16:29:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:43,836 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 16:29:43,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 16:29:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 16:29:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 16:29:43,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:43,839 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:44,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:44,042 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:44,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1442326180, now seen corresponding path program 7 times [2020-07-20 16:29:44,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:44,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518320833] [2020-07-20 16:29:44,044 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 [2020-07-20 16:29:44,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:44,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:44,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:29:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-20 16:29:44,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:45,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-20 16:29:45,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518320833] [2020-07-20 16:29:45,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:45,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 16:29:45,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945652202] [2020-07-20 16:29:45,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:29:45,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:29:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:29:45,741 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 17 states. [2020-07-20 16:29:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:45,972 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2020-07-20 16:29:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:29:45,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-07-20 16:29:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:45,975 INFO L225 Difference]: With dead ends: 73 [2020-07-20 16:29:45,975 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 16:29:45,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:29:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 16:29:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 16:29:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:29:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2020-07-20 16:29:45,984 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 177 [2020-07-20 16:29:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:45,985 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2020-07-20 16:29:45,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:29:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2020-07-20 16:29:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 16:29:45,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:45,990 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:46,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:46,206 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2107730799, now seen corresponding path program 8 times [2020-07-20 16:29:46,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:46,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724494035] [2020-07-20 16:29:46,208 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 [2020-07-20 16:29:46,345 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:29:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 3187 proven. 839 refuted. 0 times theorem prover too weak. 2013 trivial. 0 not checked. [2020-07-20 16:29:46,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:48,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:48,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 632 proven. 1750 refuted. 0 times theorem prover too weak. 3657 trivial. 0 not checked. [2020-07-20 16:29:49,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724494035] [2020-07-20 16:29:49,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:49,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 16:29:49,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273502274] [2020-07-20 16:29:49,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:29:49,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:29:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:29:49,852 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand 25 states. [2020-07-20 16:29:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:50,626 INFO L93 Difference]: Finished difference Result 149 states and 239 transitions. [2020-07-20 16:29:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 16:29:50,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 327 [2020-07-20 16:29:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:50,629 INFO L225 Difference]: With dead ends: 149 [2020-07-20 16:29:50,629 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 16:29:50,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 609 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 16:29:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 16:29:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-07-20 16:29:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 16:29:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-20 16:29:50,641 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 327 [2020-07-20 16:29:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:50,641 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-20 16:29:50,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:29:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-20 16:29:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 16:29:50,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:50,646 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:50,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:50,862 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash -902141708, now seen corresponding path program 9 times [2020-07-20 16:29:50,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:50,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774216096] [2020-07-20 16:29:50,864 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 [2020-07-20 16:29:51,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:51,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:29:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-20 16:29:51,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:52,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-20 16:29:53,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774216096] [2020-07-20 16:29:53,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:53,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 16:29:53,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776421893] [2020-07-20 16:29:53,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:29:53,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:53,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:29:53,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:29:53,720 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 19 states. [2020-07-20 16:29:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:54,009 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2020-07-20 16:29:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:29:54,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 286 [2020-07-20 16:29:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:54,013 INFO L225 Difference]: With dead ends: 90 [2020-07-20 16:29:54,013 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 16:29:54,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:29:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 16:29:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-20 16:29:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 16:29:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-20 16:29:54,030 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 286 [2020-07-20 16:29:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:54,036 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-20 16:29:54,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:29:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-20 16:29:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-20 16:29:54,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:54,047 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:54,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:54,257 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash 15696592, now seen corresponding path program 10 times [2020-07-20 16:29:54,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:54,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637629952] [2020-07-20 16:29:54,259 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 [2020-07-20 16:29:54,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:29:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 16:29:54,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1939 proven. 3340 refuted. 0 times theorem prover too weak. 11128 trivial. 0 not checked. [2020-07-20 16:29:54,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:57,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:57,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:58,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:00,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:00,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:00,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:00,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:01,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:01,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:01,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:01,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1939 proven. 3454 refuted. 0 times theorem prover too weak. 11014 trivial. 0 not checked. [2020-07-20 16:30:01,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637629952] [2020-07-20 16:30:01,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:01,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 33 [2020-07-20 16:30:01,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149247391] [2020-07-20 16:30:01,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:30:01,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:30:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:30:01,390 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 33 states. [2020-07-20 16:30:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:02,785 INFO L93 Difference]: Finished difference Result 215 states and 403 transitions. [2020-07-20 16:30:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 16:30:02,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 531 [2020-07-20 16:30:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:02,789 INFO L225 Difference]: With dead ends: 215 [2020-07-20 16:30:02,790 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 16:30:02,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 1001 SyntacticMatches, 29 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=987, Invalid=3045, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:30:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 16:30:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-07-20 16:30:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 16:30:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2020-07-20 16:30:02,803 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 531 [2020-07-20 16:30:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:02,804 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2020-07-20 16:30:02,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:30:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2020-07-20 16:30:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 16:30:02,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:02,808 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:03,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:03,017 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash -768599631, now seen corresponding path program 11 times [2020-07-20 16:30:03,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:03,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189674509] [2020-07-20 16:30:03,019 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 [2020-07-20 16:30:03,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:03,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:03,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:30:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-20 16:30:03,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:05,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:06,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:06,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:06,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-20 16:30:07,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189674509] [2020-07-20 16:30:07,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:07,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 16:30:07,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154347061] [2020-07-20 16:30:07,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 16:30:07,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 16:30:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:30:07,531 INFO L87 Difference]: Start difference. First operand 112 states and 157 transitions. Second operand 20 states. [2020-07-20 16:30:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:07,832 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2020-07-20 16:30:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:30:07,833 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 463 [2020-07-20 16:30:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:07,835 INFO L225 Difference]: With dead ends: 119 [2020-07-20 16:30:07,835 INFO L226 Difference]: Without dead ends: 115 [2020-07-20 16:30:07,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:30:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-20 16:30:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-07-20 16:30:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 16:30:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 164 transitions. [2020-07-20 16:30:07,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 164 transitions. Word has length 463 [2020-07-20 16:30:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:07,855 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 164 transitions. [2020-07-20 16:30:07,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 16:30:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 164 transitions. [2020-07-20 16:30:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1186 [2020-07-20 16:30:07,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:07,870 INFO L422 BasicCegarLoop]: trace histogram [173, 173, 140, 86, 86, 86, 86, 86, 86, 86, 54, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:08,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:08,077 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2050473472, now seen corresponding path program 12 times [2020-07-20 16:30:08,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:08,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917625848] [2020-07-20 16:30:08,080 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 [2020-07-20 16:30:08,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:08,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 16:30:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 83862 backedges. 5718 proven. 11557 refuted. 0 times theorem prover too weak. 66587 trivial. 0 not checked. [2020-07-20 16:30:09,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:16,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:18,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:19,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:20,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:21,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:21,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:21,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:22,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:22,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:22,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:22,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:22,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:24,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:24,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:25,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:25,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:26,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 83862 backedges. 5718 proven. 11789 refuted. 0 times theorem prover too weak. 66355 trivial. 0 not checked. [2020-07-20 16:30:27,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917625848] [2020-07-20 16:30:27,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:27,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41] total 45 [2020-07-20 16:30:27,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177538619] [2020-07-20 16:30:27,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 16:30:27,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 16:30:27,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 16:30:27,517 INFO L87 Difference]: Start difference. First operand 115 states and 164 transitions. Second operand 45 states. [2020-07-20 16:30:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:32,346 INFO L93 Difference]: Finished difference Result 335 states and 760 transitions. [2020-07-20 16:30:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-20 16:30:32,349 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 1185 [2020-07-20 16:30:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:32,354 INFO L225 Difference]: With dead ends: 335 [2020-07-20 16:30:32,354 INFO L226 Difference]: Without dead ends: 226 [2020-07-20 16:30:32,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2418 GetRequests, 2289 SyntacticMatches, 37 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2087, Invalid=6655, Unknown=0, NotChecked=0, Total=8742 [2020-07-20 16:30:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-20 16:30:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 170. [2020-07-20 16:30:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 16:30:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 270 transitions. [2020-07-20 16:30:32,376 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 270 transitions. Word has length 1185 [2020-07-20 16:30:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:32,377 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 270 transitions. [2020-07-20 16:30:32,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 16:30:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 270 transitions. [2020-07-20 16:30:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-20 16:30:32,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:32,383 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:32,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:32,595 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 13 times [2020-07-20 16:30:32,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:32,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791788327] [2020-07-20 16:30:32,597 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:33,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:30:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:33,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-20 16:30:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 16:30:34,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 16:30:46,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791788327] [2020-07-20 16:30:46,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:46,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 16:30:46,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180388701] [2020-07-20 16:30:46,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 16:30:46,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:46,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 16:30:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 16:30:46,904 INFO L87 Difference]: Start difference. First operand 170 states and 270 transitions. Second operand 36 states. [2020-07-20 16:30:47,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:47,482 INFO L93 Difference]: Finished difference Result 174 states and 273 transitions. [2020-07-20 16:30:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 16:30:47,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-20 16:30:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:47,488 INFO L225 Difference]: With dead ends: 174 [2020-07-20 16:30:47,488 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 16:30:47,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 16:30:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 16:30:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-07-20 16:30:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 16:30:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 269 transitions. [2020-07-20 16:30:47,519 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 269 transitions. Word has length 749 [2020-07-20 16:30:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:47,520 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 269 transitions. [2020-07-20 16:30:47,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 16:30:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 269 transitions. [2020-07-20 16:30:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-20 16:30:47,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:47,540 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:47,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:47,755 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -655445274, now seen corresponding path program 14 times [2020-07-20 16:30:47,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:47,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780228813] [2020-07-20 16:30:47,756 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:48,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:48,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:30:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1362 proven. 8020 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2020-07-20 16:30:49,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:54,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:54,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:56,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:57,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:57,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:58,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:58,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:59,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1362 proven. 8146 refuted. 0 times theorem prover too weak. 78261 trivial. 0 not checked. [2020-07-20 16:31:00,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780228813] [2020-07-20 16:31:00,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:31:00,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 16:31:00,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140139817] [2020-07-20 16:31:00,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 16:31:00,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:31:00,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 16:31:00,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:31:00,566 INFO L87 Difference]: Start difference. First operand 170 states and 269 transitions. Second operand 24 states. [2020-07-20 16:31:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:31:00,965 INFO L93 Difference]: Finished difference Result 170 states and 269 transitions. [2020-07-20 16:31:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 16:31:00,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1212 [2020-07-20 16:31:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:31:00,970 INFO L225 Difference]: With dead ends: 170 [2020-07-20 16:31:00,970 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:31:00,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2380 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:31:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:31:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:31:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:31:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:31:00,974 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2020-07-20 16:31:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:31:00,975 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:31:00,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 16:31:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:31:00,975 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:31:01,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:01,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:31:02,080 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 8 [2020-07-20 16:31:03,442 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 152 DAG size of output: 55 [2020-07-20 16:31:03,446 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:31:03,446 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 16:31:03,446 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 16:31:03,446 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse6 (<= |fibonacci_#in~n| 5)) (.cse7 (<= 5 |fibonacci_#in~n|))) (let ((.cse0 (<= 7 |fibonacci_#in~n|)) (.cse1 (and .cse6 (= 3 |fibonacci_#t~ret0|) .cse7)) (.cse2 (not .cse7)) (.cse4 (<= 4 |fibonacci_#in~n|))) (and (or (not .cse0) (not (<= |fibonacci_#in~n| 7)) (= 8 |fibonacci_#t~ret0|)) (or .cse1 .cse2 (= 5 |fibonacci_#t~ret0|) .cse0) (let ((.cse3 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse5 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse3 .cse4 .cse5) (and (= 1 |fibonacci_#t~ret0|) .cse3 (<= 2 |fibonacci_#in~n|) .cse5))) (or (and (= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 8)) (and (<= 9 |fibonacci_#in~n|) (= 21 |fibonacci_#t~ret0|)) (not (<= 8 |fibonacci_#in~n|)) (<= 10 |fibonacci_#in~n|)) (or (not .cse6) .cse1 .cse2) (or (= 2 |fibonacci_#t~ret0|) (not (<= |fibonacci_#in~n| 4)) (not .cse4))))) [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:31:03,447 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:31:03,447 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:31:03,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 9) (<= 9 main_~x~0)) [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-20 16:31:03,448 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2020-07-20 16:31:03,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:31:03 BoogieIcfgContainer [2020-07-20 16:31:03,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:31:03,454 INFO L168 Benchmark]: Toolchain (without parser) took 91465.87 ms. Allocated memory was 137.9 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 102.8 MB in the beginning and 130.2 MB in the end (delta: -27.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,455 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.77 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,456 INFO L168 Benchmark]: Boogie Preprocessor took 33.53 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,457 INFO L168 Benchmark]: RCFGBuilder took 326.47 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 91.6 MB in the beginning and 167.1 MB in the end (delta: -75.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,457 INFO L168 Benchmark]: TraceAbstraction took 90786.75 ms. Allocated memory was 199.2 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 167.1 MB in the beginning and 130.2 MB in the end (delta: 37.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2020-07-20 16:31:03,460 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.77 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.53 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.47 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 91.6 MB in the beginning and 167.1 MB in the end (delta: -75.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 90786.75 ms. Allocated memory was 199.2 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 167.1 MB in the beginning and 130.2 MB in the end (delta: 37.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 88.4s, OverallIterations: 19, TraceHistogramMax: 177, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 462 SDtfs, 2663 SDslu, 2896 SDs, 0 SdLazy, 4169 SolverSat, 5028 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11225 GetRequests, 10502 SyntacticMatches, 228 SemanticMatches, 495 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=17, 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, 19 MinimizatonAttempts, 140 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 269 PreInvPairs, 458 NumberOfFragments, 133 HoareAnnotationTreeSize, 269 FomulaSimplifications, 3224 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5904 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 69.7s InterpolantComputationTime, 5537 NumberOfCodeBlocks, 3800 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 11011 ConstructedInterpolants, 0 QuantifiedInterpolants, 12061873 SizeOfPredicates, 136 NumberOfNonLiveVariables, 9974 ConjunctsInSsa, 701 ConjunctsInUnsatCore, 36 InterpolantComputations, 2 PerfectInterpolantSequences, 415213/495756 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...