/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:57:41,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:57:41,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:57:41,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:57:41,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:57:41,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:57:41,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:57:41,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:57:41,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:57:41,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:57:41,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:57:41,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:57:41,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:57:41,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:57:41,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:57:41,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:57:41,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:57:41,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:57:41,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:57:41,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:57:41,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:57:41,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:57:41,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:57:41,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:57:41,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:57:41,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:57:41,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:57:41,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:57:41,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:57:41,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:57:41,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:57:41,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:57:41,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:57:41,165 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:57:41,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:57:41,166 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:57:41,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:57:41,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:57:41,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:57:41,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:57:41,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:57:41,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:57:41,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:57:41,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:57:41,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:57:41,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:57:41,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:57:41,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:57:41,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:57:41,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:57:41,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:41,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:57:41,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:57:41,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:57:41,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:57:41,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:41,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:57:41,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:57:41,170 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 -> NOT_INCREMENTALLY [2020-07-21 10:57:41,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:57:41,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:57:41,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:57:41,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:57:41,522 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:57:41,523 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 10:57:41,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049f3d351/cbeb01ed47974adfb94d79f0058dfb9d/FLAGa281d9670 [2020-07-21 10:57:42,030 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:57:42,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-21 10:57:42,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049f3d351/cbeb01ed47974adfb94d79f0058dfb9d/FLAGa281d9670 [2020-07-21 10:57:42,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049f3d351/cbeb01ed47974adfb94d79f0058dfb9d [2020-07-21 10:57:42,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:57:42,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:57:42,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:42,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:57:42,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:57:42,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ebf41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42, skipping insertion in model container [2020-07-21 10:57:42,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:57:42,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:57:42,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:42,672 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:57:42,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:42,703 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:57:42,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42 WrapperNode [2020-07-21 10:57:42,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:42,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:57:42,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:57:42,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:57:42,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... [2020-07-21 10:57:42,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:57:42,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:57:42,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:57:42,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:57:42,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:57:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:57:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:57:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:57:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:57:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:57:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:57:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:57:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:57:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:57:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:57:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:57:43,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:57:43,359 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:57:43,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:43 BoogieIcfgContainer [2020-07-21 10:57:43,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:57:43,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:57:43,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:57:43,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:57:43,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:57:42" (1/3) ... [2020-07-21 10:57:43,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b884e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:43, skipping insertion in model container [2020-07-21 10:57:43,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:42" (2/3) ... [2020-07-21 10:57:43,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b884e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:43, skipping insertion in model container [2020-07-21 10:57:43,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:43" (3/3) ... [2020-07-21 10:57:43,392 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-21 10:57:43,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:57:43,413 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:57:43,437 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:57:43,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:57:43,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:57:43,476 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:57:43,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:57:43,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:57:43,477 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:57:43,478 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:57:43,478 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:57:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:57:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:57:43,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:43,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:43,525 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:57:43,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:43,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012161765] [2020-07-21 10:57:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:43,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:43,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012161765] [2020-07-21 10:57:43,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:43,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:43,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854393448] [2020-07-21 10:57:43,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:43,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:43,801 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:57:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:43,925 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:57:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:43,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:57:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:43,940 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:57:43,943 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:57:43,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:57:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:57:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:44,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:57:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:44,010 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:44,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:57:44,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:44,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:44,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:44,228 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:57:44,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:44,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650041545] [2020-07-21 10:57:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:44,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650041545] [2020-07-21 10:57:44,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:44,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:44,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080078595] [2020-07-21 10:57:44,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:44,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:44,310 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:57:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:44,384 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:57:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:44,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:57:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:44,387 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:57:44,387 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:57:44,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:57:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:57:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:44,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:57:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:44,400 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:44,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:57:44,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:44,402 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:44,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:44,618 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:44,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:57:44,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:44,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299325282] [2020-07-21 10:57:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:44,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:44,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:44,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:44,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299325282] [2020-07-21 10:57:44,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:44,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:44,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405062385] [2020-07-21 10:57:44,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:44,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:44,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:44,993 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:57:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:45,141 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:57:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:45,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:57:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:45,144 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:57:45,144 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:57:45,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:57:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:57:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:45,156 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:57:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:45,157 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:45,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:57:45,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:45,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:45,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:45,375 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:45,376 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:57:45,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:45,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197215565] [2020-07-21 10:57:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:45,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:45,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:45,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:45,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197215565] [2020-07-21 10:57:45,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:45,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:45,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808694037] [2020-07-21 10:57:45,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:45,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:45,648 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:57:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:45,770 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:57:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:45,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:57:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:45,773 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:57:45,773 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:57:45,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:57:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:57:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:45,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:57:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:45,783 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:45,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:57:45,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:45,785 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:45,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:46,000 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:57:46,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:46,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777149580] [2020-07-21 10:57:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:57:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:46,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:46,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:46,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:46,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777149580] [2020-07-21 10:57:46,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:46,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:57:46,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074951098] [2020-07-21 10:57:46,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:57:46,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:57:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:46,461 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:57:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:46,624 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:57:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:46,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:57:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:46,627 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:57:46,627 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:57:46,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:57:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:57:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:46,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:57:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:46,638 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:46,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:57:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:57:46,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:46,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:46,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:46,846 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:57:46,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:46,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751485175] [2020-07-21 10:57:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:57:46,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:47,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:47,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:47,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:47,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751485175] [2020-07-21 10:57:47,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:47,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:57:47,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126274469] [2020-07-21 10:57:47,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:57:47,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:57:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:47,248 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:57:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:47,399 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:57:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:47,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:57:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:47,402 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:57:47,402 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:57:47,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:57:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:57:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:47,413 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:57:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:47,413 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:47,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:57:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:57:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:47,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:47,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:47,630 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:57:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:47,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676597480] [2020-07-21 10:57:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:57:47,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:48,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:48,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:48,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:48,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:57:48,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676597480] [2020-07-21 10:57:48,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:48,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:57:48,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544747296] [2020-07-21 10:57:48,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:57:48,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:57:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:48,290 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:57:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:48,478 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:57:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:48,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:57:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:48,482 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:57:48,482 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:57:48,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:57:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:57:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:57:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:57:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:57:48,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:57:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:48,494 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:57:48,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:57:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:57:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:57:48,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:48,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:48,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:48,710 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:57:48,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:48,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719485253] [2020-07-21 10:57:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:57:48,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:49,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:57:49,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719485253] [2020-07-21 10:57:49,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:49,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:49,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600678584] [2020-07-21 10:57:49,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:49,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:49,351 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 13 states. [2020-07-21 10:57:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:49,542 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:57:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:49,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-07-21 10:57:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:49,546 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:57:49,546 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:57:49,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:57:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:57:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:57:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:57:49,558 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:57:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:49,559 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:57:49,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:57:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:57:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:49,562 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:49,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:49,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:57:49,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:49,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905031608] [2020-07-21 10:57:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:57:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:57:49,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:50,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:57:50,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905031608] [2020-07-21 10:57:50,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:50,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:57:50,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010870385] [2020-07-21 10:57:50,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:57:50,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:57:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:50,854 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 15 states. [2020-07-21 10:57:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:51,100 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:57:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:57:51,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-07-21 10:57:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:51,108 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:57:51,108 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:57:51,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:57:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:57:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:57:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:57:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:57:51,120 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:57:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:51,121 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:57:51,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:57:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:57:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:57:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:51,123 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:51,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:51,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:51,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:57:51,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:51,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497837138] [2020-07-21 10:57:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 79 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-07-21 10:57:51,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:51,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:51,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 27 proven. 83 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-21 10:57:52,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497837138] [2020-07-21 10:57:52,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:52,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:52,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859333961] [2020-07-21 10:57:52,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:52,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:52,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:52,099 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 13 states. [2020-07-21 10:57:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:52,263 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-07-21 10:57:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:52,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-07-21 10:57:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:52,271 INFO L225 Difference]: With dead ends: 84 [2020-07-21 10:57:52,271 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 10:57:52,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 10:57:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-07-21 10:57:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:57:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 10:57:52,286 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 108 [2020-07-21 10:57:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:52,286 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 10:57:52,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 10:57:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 10:57:52,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:52,288 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:52,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:52,503 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash -60364660, now seen corresponding path program 1 times [2020-07-21 10:57:52,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:52,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672685630] [2020-07-21 10:57:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 56 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-07-21 10:57:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:52,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:53,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-07-21 10:57:53,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672685630] [2020-07-21 10:57:53,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:53,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:53,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974146608] [2020-07-21 10:57:53,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:53,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:53,052 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 11 states. [2020-07-21 10:57:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:53,181 INFO L93 Difference]: Finished difference Result 79 states and 145 transitions. [2020-07-21 10:57:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:53,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-07-21 10:57:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:53,185 INFO L225 Difference]: With dead ends: 79 [2020-07-21 10:57:53,185 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 10:57:53,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 10:57:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-21 10:57:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 10:57:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2020-07-21 10:57:53,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 109 [2020-07-21 10:57:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:53,197 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2020-07-21 10:57:53,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2020-07-21 10:57:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:57:53,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:53,199 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:53,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:53,415 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash 836558126, now seen corresponding path program 1 times [2020-07-21 10:57:53,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:53,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760606269] [2020-07-21 10:57:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:57:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 105 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-07-21 10:57:53,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:54,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 81 proven. 113 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 10:57:54,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760606269] [2020-07-21 10:57:54,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:54,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:57:54,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066044069] [2020-07-21 10:57:54,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:57:54,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:57:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:54,497 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand 15 states. [2020-07-21 10:57:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:54,738 INFO L93 Difference]: Finished difference Result 94 states and 199 transitions. [2020-07-21 10:57:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:57:54,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 10:57:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:54,741 INFO L225 Difference]: With dead ends: 94 [2020-07-21 10:57:54,741 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:57:54,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:57:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:57:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-21 10:57:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-21 10:57:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 95 transitions. [2020-07-21 10:57:54,752 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 95 transitions. Word has length 135 [2020-07-21 10:57:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:54,753 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 95 transitions. [2020-07-21 10:57:54,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:57:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 95 transitions. [2020-07-21 10:57:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:57:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:54,757 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:54,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:54,968 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1608635723, now seen corresponding path program 2 times [2020-07-21 10:57:54,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:54,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967092925] [2020-07-21 10:57:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 10:57:55,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:55,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 48 proven. 82 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-07-21 10:57:55,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967092925] [2020-07-21 10:57:55,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:55,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341981998] [2020-07-21 10:57:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:55,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:55,721 INFO L87 Difference]: Start difference. First operand 62 states and 95 transitions. Second operand 13 states. [2020-07-21 10:57:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:55,900 INFO L93 Difference]: Finished difference Result 92 states and 161 transitions. [2020-07-21 10:57:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:55,901 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 10:57:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:55,904 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:57:55,904 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:57:55,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:57:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-07-21 10:57:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:57:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2020-07-21 10:57:55,915 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 121 [2020-07-21 10:57:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:55,915 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2020-07-21 10:57:55,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2020-07-21 10:57:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-21 10:57:55,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:55,917 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:56,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:56,133 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 3 times [2020-07-21 10:57:56,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:56,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029311411] [2020-07-21 10:57:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:56,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:56,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 10:57:56,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:56,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-21 10:57:56,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029311411] [2020-07-21 10:57:56,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:56,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:56,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552626056] [2020-07-21 10:57:56,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:56,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:56,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:56,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:56,636 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand 11 states. [2020-07-21 10:57:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:56,767 INFO L93 Difference]: Finished difference Result 84 states and 140 transitions. [2020-07-21 10:57:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:56,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-07-21 10:57:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:56,770 INFO L225 Difference]: With dead ends: 84 [2020-07-21 10:57:56,770 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 10:57:56,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 10:57:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-21 10:57:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 10:57:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 122 transitions. [2020-07-21 10:57:56,780 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 122 transitions. Word has length 95 [2020-07-21 10:57:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:56,783 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 122 transitions. [2020-07-21 10:57:56,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 122 transitions. [2020-07-21 10:57:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 10:57:56,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:56,787 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:56,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:56,995 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 594466134, now seen corresponding path program 4 times [2020-07-21 10:57:56,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:56,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991205433] [2020-07-21 10:57:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 83 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 10:57:57,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:57,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 10:57:57,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991205433] [2020-07-21 10:57:57,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:57,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:57,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793706648] [2020-07-21 10:57:57,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:57,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:57,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:57,743 INFO L87 Difference]: Start difference. First operand 72 states and 122 transitions. Second operand 13 states. [2020-07-21 10:57:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:57,914 INFO L93 Difference]: Finished difference Result 92 states and 158 transitions. [2020-07-21 10:57:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:57,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2020-07-21 10:57:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:57,916 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:57:57,916 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:57:57,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 193 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:57:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-07-21 10:57:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 10:57:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 10:57:57,933 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 107 [2020-07-21 10:57:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:57,933 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 10:57:57,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 10:57:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:57:57,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:57,936 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:58,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:58,151 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 5 times [2020-07-21 10:57:58,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:58,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140509826] [2020-07-21 10:57:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-07-21 10:57:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:58,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 10:57:58,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140509826] [2020-07-21 10:57:58,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:58,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:58,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493211264] [2020-07-21 10:57:58,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:58,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:58,654 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 11 states. [2020-07-21 10:57:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:58,781 INFO L93 Difference]: Finished difference Result 91 states and 155 transitions. [2020-07-21 10:57:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:58,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-07-21 10:57:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:58,784 INFO L225 Difference]: With dead ends: 91 [2020-07-21 10:57:58,784 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 10:57:58,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 10:57:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-07-21 10:57:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 10:57:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 119 transitions. [2020-07-21 10:57:58,793 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 119 transitions. Word has length 108 [2020-07-21 10:57:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:58,794 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 119 transitions. [2020-07-21 10:57:58,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 119 transitions. [2020-07-21 10:57:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 10:57:58,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:58,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:59,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,010 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 6 times [2020-07-21 10:57:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:59,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139120691] [2020-07-21 10:57:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-21 10:57:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 10:57:59,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-21 10:58:00,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139120691] [2020-07-21 10:58:00,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:00,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 10:58:00,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406770566] [2020-07-21 10:58:00,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 10:58:00,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 10:58:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:58:00,202 INFO L87 Difference]: Start difference. First operand 73 states and 119 transitions. Second operand 28 states. [2020-07-21 10:58:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:00,638 INFO L93 Difference]: Finished difference Result 148 states and 317 transitions. [2020-07-21 10:58:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 10:58:00,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-21 10:58:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:00,642 INFO L225 Difference]: With dead ends: 148 [2020-07-21 10:58:00,642 INFO L226 Difference]: Without dead ends: 144 [2020-07-21 10:58:00,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:58:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-07-21 10:58:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-07-21 10:58:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 10:58:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 10:58:00,664 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 109 [2020-07-21 10:58:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:00,665 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 10:58:00,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 10:58:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 10:58:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-21 10:58:00,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:00,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:00,882 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash -706406608, now seen corresponding path program 7 times [2020-07-21 10:58:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494142415] [2020-07-21 10:58:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:58:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 60 proven. 98 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-07-21 10:58:01,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:01,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 62 proven. 100 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-21 10:58:01,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494142415] [2020-07-21 10:58:01,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:01,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:01,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672179171] [2020-07-21 10:58:01,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:01,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:01,719 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 10:58:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:01,926 INFO L93 Difference]: Finished difference Result 156 states and 384 transitions. [2020-07-21 10:58:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:01,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2020-07-21 10:58:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:01,929 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:58:01,929 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 10:58:01,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 253 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 10:58:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-21 10:58:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 10:58:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2020-07-21 10:58:01,948 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 137 [2020-07-21 10:58:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:01,948 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2020-07-21 10:58:01,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2020-07-21 10:58:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 10:58:01,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:01,952 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:02,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:02,166 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1521075862, now seen corresponding path program 8 times [2020-07-21 10:58:02,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:02,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130988344] [2020-07-21 10:58:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 10:58:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:58:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-07-21 10:58:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:02,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:02,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-21 10:58:03,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130988344] [2020-07-21 10:58:03,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:03,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:58:03,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395487900] [2020-07-21 10:58:03,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:03,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:03,008 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand 13 states. [2020-07-21 10:58:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:03,205 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2020-07-21 10:58:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:03,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-07-21 10:58:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:03,208 INFO L225 Difference]: With dead ends: 138 [2020-07-21 10:58:03,208 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 10:58:03,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 10:58:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-07-21 10:58:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-21 10:58:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 257 transitions. [2020-07-21 10:58:03,222 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 257 transitions. Word has length 110 [2020-07-21 10:58:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:03,222 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 257 transitions. [2020-07-21 10:58:03,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 257 transitions. [2020-07-21 10:58:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:03,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:03,225 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:03,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:03,439 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 989968015, now seen corresponding path program 9 times [2020-07-21 10:58:03,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:03,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812268729] [2020-07-21 10:58:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:58:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 112 proven. 26 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 10:58:03,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:04,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 111 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 10:58:04,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812268729] [2020-07-21 10:58:04,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:04,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:58:04,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275165938] [2020-07-21 10:58:04,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:04,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:04,417 INFO L87 Difference]: Start difference. First operand 114 states and 257 transitions. Second operand 15 states. [2020-07-21 10:58:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:04,708 INFO L93 Difference]: Finished difference Result 147 states and 340 transitions. [2020-07-21 10:58:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:04,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 10:58:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:04,714 INFO L225 Difference]: With dead ends: 147 [2020-07-21 10:58:04,714 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 10:58:04,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 10:58:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2020-07-21 10:58:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 10:58:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2020-07-21 10:58:04,736 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 121 [2020-07-21 10:58:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:04,737 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2020-07-21 10:58:04,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2020-07-21 10:58:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:04,741 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:04,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:04,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:04,956 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:04,956 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 10 times [2020-07-21 10:58:04,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:04,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085335973] [2020-07-21 10:58:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:58:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-07-21 10:58:05,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:05,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 86 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-07-21 10:58:05,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085335973] [2020-07-21 10:58:05,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:05,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 10:58:05,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132974976] [2020-07-21 10:58:05,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:58:05,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:58:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:58:05,618 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand 13 states. [2020-07-21 10:58:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:05,800 INFO L93 Difference]: Finished difference Result 128 states and 276 transitions. [2020-07-21 10:58:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:58:05,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-07-21 10:58:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:05,803 INFO L225 Difference]: With dead ends: 128 [2020-07-21 10:58:05,803 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 10:58:05,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:58:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 10:58:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2020-07-21 10:58:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 10:58:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-07-21 10:58:05,814 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 121 [2020-07-21 10:58:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:05,816 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-07-21 10:58:05,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:58:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-07-21 10:58:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:05,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:05,818 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:06,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:06,033 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1853548191, now seen corresponding path program 11 times [2020-07-21 10:58:06,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:06,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670492023] [2020-07-21 10:58:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:58:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 67 proven. 71 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 10:58:06,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:06,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 10:58:06,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670492023] [2020-07-21 10:58:06,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:06,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:58:06,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133534386] [2020-07-21 10:58:06,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:06,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:06,956 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 15 states. [2020-07-21 10:58:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:07,198 INFO L93 Difference]: Finished difference Result 126 states and 280 transitions. [2020-07-21 10:58:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:07,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 10:58:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:07,204 INFO L225 Difference]: With dead ends: 126 [2020-07-21 10:58:07,204 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 10:58:07,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 10:58:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2020-07-21 10:58:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 10:58:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 147 transitions. [2020-07-21 10:58:07,214 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 147 transitions. Word has length 121 [2020-07-21 10:58:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:07,214 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 147 transitions. [2020-07-21 10:58:07,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 147 transitions. [2020-07-21 10:58:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-21 10:58:07,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:07,216 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:07,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:07,432 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash 250703466, now seen corresponding path program 1 times [2020-07-21 10:58:07,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:07,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395845060] [2020-07-21 10:58:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:58:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-07-21 10:58:07,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:08,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 38 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-07-21 10:58:08,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395845060] [2020-07-21 10:58:08,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:08,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 10:58:08,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60332352] [2020-07-21 10:58:08,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:08,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:08,530 INFO L87 Difference]: Start difference. First operand 81 states and 147 transitions. Second operand 15 states. [2020-07-21 10:58:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:08,751 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2020-07-21 10:58:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:08,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2020-07-21 10:58:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:08,753 INFO L225 Difference]: With dead ends: 124 [2020-07-21 10:58:08,754 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 10:58:08,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:58:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 10:58:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-07-21 10:58:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 10:58:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 10:58:08,762 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 110 [2020-07-21 10:58:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:08,762 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 10:58:08,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 10:58:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:08,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:08,764 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:08,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:08,977 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 12 times [2020-07-21 10:58:08,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:08,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359514880] [2020-07-21 10:58:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:58:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 10:58:09,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:09,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 48 proven. 117 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-07-21 10:58:10,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359514880] [2020-07-21 10:58:10,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:10,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 10:58:10,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967797192] [2020-07-21 10:58:10,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:58:10,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:58:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:58:10,283 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-21 10:58:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:10,582 INFO L93 Difference]: Finished difference Result 129 states and 200 transitions. [2020-07-21 10:58:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:58:10,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-07-21 10:58:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:10,584 INFO L225 Difference]: With dead ends: 129 [2020-07-21 10:58:10,584 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 10:58:10,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 215 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:58:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 10:58:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 10:58:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:58:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 10:58:10,591 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 121 [2020-07-21 10:58:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 10:58:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:58:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 10:58:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:58:10,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:10,593 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:10,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:10,807 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1847656481, now seen corresponding path program 13 times [2020-07-21 10:58:10,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:10,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158426588] [2020-07-21 10:58:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:58:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 86 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-07-21 10:58:10,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:11,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 10:58:11,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158426588] [2020-07-21 10:58:11,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:11,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:58:11,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189920714] [2020-07-21 10:58:11,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:58:11,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:58:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:58:11,818 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2020-07-21 10:58:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:11,989 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-07-21 10:58:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:58:11,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-07-21 10:58:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:11,990 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:58:11,990 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:58:11,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:58:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:58:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:58:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:58:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:58:11,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-07-21 10:58:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:11,993 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:58:11,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:58:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:58:11,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:58:12,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:12,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:58:14,137 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2020-07-21 10:58:14,706 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2020-07-21 10:58:14,983 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-07-21 10:58:14,987 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:58:14,987 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:58:14,987 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:58:14,987 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:58:14,987 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:58:14,987 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 10:58:14,988 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 10:58:14,989 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) (and (<= 4 |fibo2_#in~n|) (= 2 |fibo2_#t~ret2|)) (and (= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 3))) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:58:14,989 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:58:14,990 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 10:58:14,990 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 10:58:14,990 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 10:58:14,990 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 4 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (<= 6 |fibo1_#in~n|) .cse1) (and (= 3 |fibo1_#t~ret0|) .cse1) (and (<= |fibo1_#in~n| 4) .cse1)))) [2020-07-21 10:58:14,990 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:58:14,990 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 10:58:14,990 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 10:58:14,990 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 10:58:14,991 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:58:14,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:58:14 BoogieIcfgContainer [2020-07-21 10:58:14,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:58:14,997 INFO L168 Benchmark]: Toolchain (without parser) took 32523.30 ms. Allocated memory was 143.1 MB in the beginning and 454.6 MB in the end (delta: 311.4 MB). Free memory was 99.3 MB in the beginning and 104.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 332.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:14,998 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 118.0 MB in the beginning and 117.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:58:15,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.18 ms. Allocated memory is still 143.1 MB. Free memory was 98.9 MB in the beginning and 89.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:15,002 INFO L168 Benchmark]: Boogie Preprocessor took 144.07 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.4 MB in the beginning and 179.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:15,004 INFO L168 Benchmark]: RCFGBuilder took 512.62 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 166.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:15,004 INFO L168 Benchmark]: TraceAbstraction took 31622.45 ms. Allocated memory was 200.8 MB in the beginning and 454.6 MB in the end (delta: 253.8 MB). Free memory was 165.4 MB in the beginning and 104.1 MB in the end (delta: 61.4 MB). Peak memory consumption was 341.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:58:15,009 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 143.1 MB. Free memory was 118.0 MB in the beginning and 117.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.18 ms. Allocated memory is still 143.1 MB. Free memory was 98.9 MB in the beginning and 89.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.07 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.4 MB in the beginning and 179.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 512.62 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 166.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31622.45 ms. Allocated memory was 200.8 MB in the beginning and 454.6 MB in the end (delta: 253.8 MB). Free memory was 165.4 MB in the beginning and 104.1 MB in the end (delta: 61.4 MB). Peak memory consumption was 341.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.7s, OverallIterations: 25, TraceHistogramMax: 11, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 707 SDtfs, 791 SDslu, 4724 SDs, 0 SdLazy, 3888 SolverSat, 554 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4445 GetRequests, 3901 SyntacticMatches, 181 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=19, 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, 25 MinimizatonAttempts, 340 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 134 PreInvPairs, 1204 NumberOfFragments, 102 HoareAnnotationTreeSize, 134 FomulaSimplifications, 3894644 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2083 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 2197 NumberOfCodeBlocks, 2197 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 827309 SizeOfPredicates, 108 NumberOfNonLiveVariables, 4908 ConjunctsInSsa, 284 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 8076/10394 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...