/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:34:24,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:34:24,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:34:24,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:34:24,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:34:24,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:34:24,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:34:24,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:34:24,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:34:24,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:34:24,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:34:24,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:34:24,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:34:24,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:34:24,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:34:24,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:34:24,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:34:24,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:34:24,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:34:24,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:34:24,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:34:24,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:34:24,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:34:24,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:34:24,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:34:24,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:34:24,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:34:24,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:34:24,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:34:24,133 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:34:24,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:34:24,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:34:24,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:34:24,135 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:34:24,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:34:24,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:34:24,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:34:24,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:34:24,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:34:24,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:34:24,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:34:24,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:34:24,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:34:24,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:34:24,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:34:24,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:34:24,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:34:24,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:34:24,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:34:24,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:34:24,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:24,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:34:24,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:34:24,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:34:24,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:34:24,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:34:24,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:34:24,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:34:24,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:34:24,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:34:24,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:34:24,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:34:24,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:34:24,488 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:34:24,489 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-20 03:34:24,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1cf951ee/0c07a6289a4c4e7dafa2c2e52ece37f4/FLAGa07d6c6f2 [2020-07-20 03:34:25,087 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:34:25,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-20 03:34:25,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1cf951ee/0c07a6289a4c4e7dafa2c2e52ece37f4/FLAGa07d6c6f2 [2020-07-20 03:34:25,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1cf951ee/0c07a6289a4c4e7dafa2c2e52ece37f4 [2020-07-20 03:34:25,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:34:25,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:34:25,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:25,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:34:25,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:34:25,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7709b8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25, skipping insertion in model container [2020-07-20 03:34:25,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:34:25,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:34:25,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:25,774 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:34:25,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:25,811 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:34:25,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25 WrapperNode [2020-07-20 03:34:25,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:25,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:34:25,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:34:25,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:34:25,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... [2020-07-20 03:34:25,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:34:25,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:34:25,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:34:25,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:34:25,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:34:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:34:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 03:34:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 03:34:26,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:34:26,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:34:26,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:34:26,028 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 03:34:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 03:34:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:34:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:34:26,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:34:26,259 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:34:26,260 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:34:26,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:26 BoogieIcfgContainer [2020-07-20 03:34:26,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:34:26,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:34:26,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:34:26,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:34:26,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:34:25" (1/3) ... [2020-07-20 03:34:26,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436fc389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:26, skipping insertion in model container [2020-07-20 03:34:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:25" (2/3) ... [2020-07-20 03:34:26,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436fc389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:26, skipping insertion in model container [2020-07-20 03:34:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:26" (3/3) ... [2020-07-20 03:34:26,276 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-07-20 03:34:26,290 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:34:26,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:34:26,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:34:26,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:34:26,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:34:26,379 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:34:26,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:34:26,381 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:34:26,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:34:26,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:34:26,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:34:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 03:34:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:34:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:26,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:26,427 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 03:34:26,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:26,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101620633] [2020-07-20 03:34:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:26,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101620633] [2020-07-20 03:34:26,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:26,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:26,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757753451] [2020-07-20 03:34:26,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:26,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:26,776 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 03:34:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:26,895 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 03:34:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:26,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:34:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:26,910 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:34:26,910 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:34:26,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:34:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:34:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:26,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 03:34:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:26,982 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:26,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:34:26,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:26,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:26,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:34:26,986 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 03:34:26,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:26,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665343369] [2020-07-20 03:34:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:34:27,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665343369] [2020-07-20 03:34:27,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:27,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:27,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604310385] [2020-07-20 03:34:27,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:27,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:27,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:27,070 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 03:34:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:27,145 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 03:34:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:27,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:34:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:27,148 INFO L225 Difference]: With dead ends: 36 [2020-07-20 03:34:27,148 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:34:27,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:34:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 03:34:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:27,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 03:34:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:27,161 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:34:27,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:27,163 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] [2020-07-20 03:34:27,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:34:27,164 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 03:34:27,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:27,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182689454] [2020-07-20 03:34:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:27,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182689454] [2020-07-20 03:34:27,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298160844] [2020-07-20 03:34:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5524f06b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:27,422 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5524f06b issued 3 check-sat command(s) [2020-07-20 03:34:27,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:27,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:27,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 03:34:27,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503021131] [2020-07-20 03:34:27,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:34:27,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:34:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:34:27,536 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 03:34:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:27,796 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 03:34:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:34:27,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 03:34:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:27,799 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:34:27,799 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:34:27,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:34:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 03:34:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:34:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 03:34:27,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 03:34:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:27,811 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 03:34:27,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:34:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 03:34:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:34:27,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:27,814 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] [2020-07-20 03:34:28,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:34:28,030 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 03:34:28,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:28,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020360560] [2020-07-20 03:34:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020360560] [2020-07-20 03:34:28,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219611701] [2020-07-20 03:34:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d86ca0f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:28,172 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d86ca0f issued 3 check-sat command(s) [2020-07-20 03:34:28,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:28,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:28,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 03:34:28,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724232505] [2020-07-20 03:34:28,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:34:28,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:34:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:28,224 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-20 03:34:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:28,418 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-20 03:34:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:34:28,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 03:34:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:28,422 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:34:28,423 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:34:28,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:34:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 03:34:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:34:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-20 03:34:28,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-20 03:34:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:28,437 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-20 03:34:28,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:34:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-20 03:34:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 03:34:28,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:28,440 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] [2020-07-20 03:34:28,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:28,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 03:34:28,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:28,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64152763] [2020-07-20 03:34:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:28,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64152763] [2020-07-20 03:34:28,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290927252] [2020-07-20 03:34:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f3af11b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:28,832 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f3af11b issued 3 check-sat command(s) [2020-07-20 03:34:28,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:34:28,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:28,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-20 03:34:28,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818770281] [2020-07-20 03:34:28,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:34:28,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:34:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:28,905 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-20 03:34:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:29,257 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-20 03:34:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:34:29,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 03:34:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:29,263 INFO L225 Difference]: With dead ends: 108 [2020-07-20 03:34:29,266 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:34:29,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:34:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:34:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:34:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-20 03:34:29,307 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-20 03:34:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:29,308 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-20 03:34:29,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:34:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-20 03:34:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:34:29,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:29,319 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] [2020-07-20 03:34:29,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:29,521 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:29,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 03:34:29,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:29,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016774063] [2020-07-20 03:34:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 03:34:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016774063] [2020-07-20 03:34:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861469886] [2020-07-20 03:34:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c458069 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:29,733 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c458069 issued 3 check-sat command(s) [2020-07-20 03:34:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:29,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:29,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 03:34:29,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135168404] [2020-07-20 03:34:29,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:34:29,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:34:29,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:34:29,825 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-20 03:34:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:30,275 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-20 03:34:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:34:30,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-20 03:34:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:30,280 INFO L225 Difference]: With dead ends: 180 [2020-07-20 03:34:30,280 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 03:34:30,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:34:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 03:34:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-20 03:34:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 03:34:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-20 03:34:30,305 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-20 03:34:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:30,306 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-20 03:34:30,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:34:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-20 03:34:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 03:34:30,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:30,309 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] [2020-07-20 03:34:30,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:30,525 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 03:34:30,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:30,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810150133] [2020-07-20 03:34:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 03:34:30,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810150133] [2020-07-20 03:34:30,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79550447] [2020-07-20 03:34:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2faa2315 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:30,827 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2faa2315 issued 3 check-sat command(s) [2020-07-20 03:34:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:30,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:30,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 03:34:30,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:30,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 03:34:30,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702762702] [2020-07-20 03:34:30,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:34:30,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:34:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:34:30,934 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-20 03:34:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:31,478 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-20 03:34:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:34:31,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 03:34:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:31,482 INFO L225 Difference]: With dead ends: 258 [2020-07-20 03:34:31,482 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 03:34:31,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:34:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 03:34:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-20 03:34:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 03:34:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-20 03:34:31,511 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-20 03:34:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:31,512 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-20 03:34:31,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:34:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-20 03:34:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 03:34:31,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:31,515 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 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] [2020-07-20 03:34:31,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:34:31,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-20 03:34:31,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:31,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546632050] [2020-07-20 03:34:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-20 03:34:31,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546632050] [2020-07-20 03:34:31,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107650267] [2020-07-20 03:34:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@734dc90f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:32,054 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@734dc90f issued 3 check-sat command(s) [2020-07-20 03:34:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-20 03:34:32,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:32,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-20 03:34:32,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409785197] [2020-07-20 03:34:32,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:34:32,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:34:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:34:32,202 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 16 states. [2020-07-20 03:34:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:32,860 INFO L93 Difference]: Finished difference Result 243 states and 465 transitions. [2020-07-20 03:34:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 03:34:32,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-07-20 03:34:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:32,863 INFO L225 Difference]: With dead ends: 243 [2020-07-20 03:34:32,864 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 03:34:32,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:34:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 03:34:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-20 03:34:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 03:34:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-20 03:34:32,881 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 82 [2020-07-20 03:34:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:32,881 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-20 03:34:32,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:34:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-20 03:34:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 03:34:32,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:32,884 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:33,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:33,098 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:33,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-20 03:34:33,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:33,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33302016] [2020-07-20 03:34:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-07-20 03:34:33,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33302016] [2020-07-20 03:34:33,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339217361] [2020-07-20 03:34:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@332bf5f7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:33,551 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@332bf5f7 issued 3 check-sat command(s) [2020-07-20 03:34:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:33,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:33,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-20 03:34:33,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:33,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 03:34:33,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701363433] [2020-07-20 03:34:33,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:34:33,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:34:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:33,651 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 15 states. [2020-07-20 03:34:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:34,190 INFO L93 Difference]: Finished difference Result 172 states and 251 transitions. [2020-07-20 03:34:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:34:34,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 123 [2020-07-20 03:34:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:34,193 INFO L225 Difference]: With dead ends: 172 [2020-07-20 03:34:34,193 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 03:34:34,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:34:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 03:34:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-07-20 03:34:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 03:34:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2020-07-20 03:34:34,206 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 123 [2020-07-20 03:34:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:34,207 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2020-07-20 03:34:34,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:34:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2020-07-20 03:34:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-20 03:34:34,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:34,209 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:34,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:34,422 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash 639237618, now seen corresponding path program 1 times [2020-07-20 03:34:34,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:34,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514621325] [2020-07-20 03:34:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 179 proven. 162 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-07-20 03:34:35,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514621325] [2020-07-20 03:34:35,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252244017] [2020-07-20 03:34:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e1ff710 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:35,210 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e1ff710 issued 4 check-sat command(s) [2020-07-20 03:34:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 146 proven. 53 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-07-20 03:34:35,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:35,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2020-07-20 03:34:35,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881984070] [2020-07-20 03:34:35,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:34:35,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:35,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:34:35,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:35,346 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 18 states. [2020-07-20 03:34:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:36,145 INFO L93 Difference]: Finished difference Result 195 states and 295 transitions. [2020-07-20 03:34:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 03:34:36,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 164 [2020-07-20 03:34:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:36,152 INFO L225 Difference]: With dead ends: 195 [2020-07-20 03:34:36,152 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 03:34:36,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-07-20 03:34:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 03:34:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2020-07-20 03:34:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 03:34:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-07-20 03:34:36,192 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 164 [2020-07-20 03:34:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:36,193 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-07-20 03:34:36,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:34:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-07-20 03:34:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-07-20 03:34:36,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:36,200 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 14, 14, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:36,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:34:36,416 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1218599998, now seen corresponding path program 2 times [2020-07-20 03:34:36,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:36,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887384597] [2020-07-20 03:34:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 104 proven. 358 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2020-07-20 03:34:36,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887384597] [2020-07-20 03:34:36,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613704815] [2020-07-20 03:34:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67027f62 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:36,934 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67027f62 issued 3 check-sat command(s) [2020-07-20 03:34:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 97 proven. 259 refuted. 0 times theorem prover too weak. 919 trivial. 0 not checked. [2020-07-20 03:34:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-07-20 03:34:37,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106619273] [2020-07-20 03:34:37,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:34:37,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:34:37,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:37,128 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 18 states. [2020-07-20 03:34:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:37,819 INFO L93 Difference]: Finished difference Result 219 states and 332 transitions. [2020-07-20 03:34:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 03:34:37,819 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 220 [2020-07-20 03:34:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:37,824 INFO L225 Difference]: With dead ends: 219 [2020-07-20 03:34:37,825 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 03:34:37,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2020-07-20 03:34:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 03:34:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2020-07-20 03:34:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 03:34:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2020-07-20 03:34:37,845 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 220 [2020-07-20 03:34:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:37,845 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2020-07-20 03:34:37,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:34:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2020-07-20 03:34:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-07-20 03:34:37,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:37,852 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:38,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:38,064 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash 214574526, now seen corresponding path program 3 times [2020-07-20 03:34:38,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:38,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472687340] [2020-07-20 03:34:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 157 proven. 549 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2020-07-20 03:34:38,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472687340] [2020-07-20 03:34:38,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801682728] [2020-07-20 03:34:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ba8d5e2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:38,919 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6ba8d5e2 issued 3 check-sat command(s) [2020-07-20 03:34:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:34:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 187 proven. 345 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2020-07-20 03:34:39,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:39,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2020-07-20 03:34:39,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476154530] [2020-07-20 03:34:39,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:34:39,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:34:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:34:39,068 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand 19 states. [2020-07-20 03:34:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:39,945 INFO L93 Difference]: Finished difference Result 239 states and 324 transitions. [2020-07-20 03:34:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 03:34:39,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 272 [2020-07-20 03:34:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:39,955 INFO L225 Difference]: With dead ends: 239 [2020-07-20 03:34:39,955 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 03:34:39,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 03:34:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 03:34:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2020-07-20 03:34:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 03:34:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-07-20 03:34:39,967 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 272 [2020-07-20 03:34:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:39,968 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-07-20 03:34:39,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:34:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-07-20 03:34:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-20 03:34:39,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:39,971 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:40,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:40,185 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-07-20 03:34:40,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:40,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140586119] [2020-07-20 03:34:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d4cddd [2020-07-20 03:34:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:40,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:40,240 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:40,265 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:34:40,265 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:34:40,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 03:34:40,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:34:40 BoogieIcfgContainer [2020-07-20 03:34:40,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:34:40,329 INFO L168 Benchmark]: Toolchain (without parser) took 14808.92 ms. Allocated memory was 143.7 MB in the beginning and 432.5 MB in the end (delta: 288.9 MB). Free memory was 101.5 MB in the beginning and 333.3 MB in the end (delta: -231.8 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,330 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.98 ms. Allocated memory is still 143.7 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,332 INFO L168 Benchmark]: Boogie Preprocessor took 140.65 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,333 INFO L168 Benchmark]: RCFGBuilder took 311.89 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 166.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,333 INFO L168 Benchmark]: TraceAbstraction took 14058.32 ms. Allocated memory was 201.3 MB in the beginning and 432.5 MB in the end (delta: 231.2 MB). Free memory was 166.3 MB in the beginning and 333.3 MB in the end (delta: -167.0 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:40,337 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.98 ms. Allocated memory is still 143.7 MB. Free memory was 101.1 MB in the beginning and 91.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.65 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.89 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 166.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14058.32 ms. Allocated memory was 201.3 MB in the beginning and 432.5 MB in the end (delta: 231.2 MB). Free memory was 166.3 MB in the beginning and 333.3 MB in the end (delta: -167.0 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; VAL [x=6] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L37] int result = fibo1(x); [L38] COND TRUE result == 8 VAL [result=8, x=6] [L39] __VERIFIER_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.8s, OverallIterations: 13, TraceHistogramMax: 21, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 379 SDtfs, 591 SDslu, 2556 SDs, 0 SdLazy, 3841 SolverSat, 599 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1598 GetRequests, 1361 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=7, 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, 12 MinimizatonAttempts, 137 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 2298 NumberOfCodeBlocks, 2084 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2099 ConstructedInterpolants, 0 QuantifiedInterpolants, 503833 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1997 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 6973/9052 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 incorrect! Received shutdown request...