/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 BIGGEST_EQUIVALENCE_CLASS --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_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:43:09,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:43:09,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:43:10,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:43:10,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:43:10,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:43:10,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:43:10,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:43:10,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:43:10,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:43:10,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:43:10,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:43:10,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:43:10,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:43:10,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:43:10,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:43:10,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:43:10,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:43:10,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:43:10,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:43:10,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:43:10,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:43:10,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:43:10,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:43:10,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:43:10,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:43:10,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:43:10,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:43:10,077 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 05:43:10,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:43:10,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:43:10,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:43:10,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:43:10,123 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:43:10,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:43:10,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:43:10,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:43:10,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:43:10,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:43:10,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:43:10,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:43:10,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:43:10,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:43:10,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:43:10,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:43:10,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:43:10,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:43:10,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:43:10,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:43:10,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:43:10,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:43:10,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:43:10,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:43:10,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:43:10,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:43:10,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:43:10,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:43:10,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:43:10,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:43:10,426 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:43:10,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:43:10,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:43:10,454 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:43:10,459 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:43:10,460 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 05:43:10,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c2f7b5a/779f591a82854e75ae7042609dd5d6a3/FLAGfd4fe6e76 [2020-07-20 05:43:11,026 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:43:11,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-07-20 05:43:11,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c2f7b5a/779f591a82854e75ae7042609dd5d6a3/FLAGfd4fe6e76 [2020-07-20 05:43:11,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c2f7b5a/779f591a82854e75ae7042609dd5d6a3 [2020-07-20 05:43:11,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:43:11,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:43:11,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:43:11,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:43:11,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:43:11,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336e9fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11, skipping insertion in model container [2020-07-20 05:43:11,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:43:11,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:43:11,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:43:11,644 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:43:11,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:43:11,679 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:43:11,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11 WrapperNode [2020-07-20 05:43:11,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:43:11,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:43:11,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:43:11,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:43:11,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 05:43:11,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:43:11,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:43:11,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:43:11,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:43:11,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (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 05:43:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:43:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:43:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 05:43:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 05:43:11,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:43:11,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:43:11,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:43:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 05:43:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 05:43:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:43:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:43:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:43:12,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:43:12,187 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:43:12,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:12 BoogieIcfgContainer [2020-07-20 05:43:12,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:43:12,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:43:12,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:43:12,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:43:12,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:43:11" (1/3) ... [2020-07-20 05:43:12,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fe55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:12, skipping insertion in model container [2020-07-20 05:43:12,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (2/3) ... [2020-07-20 05:43:12,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fe55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:12, skipping insertion in model container [2020-07-20 05:43:12,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:12" (3/3) ... [2020-07-20 05:43:12,203 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-07-20 05:43:12,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:43:12,228 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:43:12,251 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:43:12,289 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:43:12,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:43:12,290 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:43:12,290 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:43:12,290 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:43:12,290 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:43:12,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:43:12,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:43:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 05:43:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 05:43:12,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:12,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:12,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 05:43:12,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:12,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121123642] [2020-07-20 05:43:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,599 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 05:43:12,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121123642] [2020-07-20 05:43:12,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:43:12,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:43:12,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718921519] [2020-07-20 05:43:12,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:43:12,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:43:12,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:43:12,624 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 05:43:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:12,748 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 05:43:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:43:12,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 05:43:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:12,760 INFO L225 Difference]: With dead ends: 44 [2020-07-20 05:43:12,761 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:43:12,765 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 05:43:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:43:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 05:43:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:43:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 05:43:12,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 05:43:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:12,815 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 05:43:12,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:43:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 05:43:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 05:43:12,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:12,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:12,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:43:12,818 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 05:43:12,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:12,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921760703] [2020-07-20 05:43:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:12,892 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 05:43:12,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921760703] [2020-07-20 05:43:12,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:43:12,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:43:12,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339162023] [2020-07-20 05:43:12,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:43:12,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:43:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:43:12,897 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 05:43:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:12,964 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 05:43:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:43:12,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 05:43:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:12,967 INFO L225 Difference]: With dead ends: 36 [2020-07-20 05:43:12,967 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 05:43:12,968 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 05:43:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 05:43:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 05:43:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 05:43:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 05:43:12,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 05:43:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:12,979 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 05:43:12,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:43:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 05:43:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:43:12,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:12,981 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 05:43:12,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:43:12,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 05:43:12,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:12,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789811765] [2020-07-20 05:43:12,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:43:13,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789811765] [2020-07-20 05:43:13,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226038118] [2020-07-20 05:43:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66c82bba 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 05:43:13,176 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66c82bba issued 3 check-sat command(s) [2020-07-20 05:43:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:43:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:13,268 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 05:43:13,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:13,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 05:43:13,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528332279] [2020-07-20 05:43:13,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:43:13,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:13,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:43:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:43:13,272 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 05:43:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:13,501 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 05:43:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:43:13,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 05:43:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:13,504 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:43:13,504 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 05:43:13,505 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 05:43:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 05:43:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 05:43:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 05:43:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 05:43:13,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 05:43:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:13,515 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 05:43:13,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:43:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 05:43:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:43:13,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:13,517 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 05:43:13,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:43:13,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 05:43:13,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:13,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005686150] [2020-07-20 05:43:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:13,862 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 05:43:13,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005686150] [2020-07-20 05:43:13,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682463468] [2020-07-20 05:43:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647e977c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:13,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647e977c issued 3 check-sat command(s) [2020-07-20 05:43:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:43:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:13,934 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 05:43:13,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:13,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 05:43:13,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706266294] [2020-07-20 05:43:13,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:43:13,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:43:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:43:13,938 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-20 05:43:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:14,118 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-20 05:43:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:43:14,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 05:43:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:14,122 INFO L225 Difference]: With dead ends: 54 [2020-07-20 05:43:14,122 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 05:43:14,123 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 05:43:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 05:43:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 05:43:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 05:43:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-20 05:43:14,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-20 05:43:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:14,138 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-20 05:43:14,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:43:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-20 05:43:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 05:43:14,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:14,140 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 05:43:14,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:14,354 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 05:43:14,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:14,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260021284] [2020-07-20 05:43:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 05:43:14,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260021284] [2020-07-20 05:43:14,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397021649] [2020-07-20 05:43:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d5e2353 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 05:43:14,519 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d5e2353 issued 3 check-sat command(s) [2020-07-20 05:43:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:43:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:14,584 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 05:43:14,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:14,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-20 05:43:14,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422470001] [2020-07-20 05:43:14,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:43:14,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:14,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:43:14,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:43:14,587 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-20 05:43:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:14,893 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-20 05:43:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 05:43:14,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 05:43:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:14,896 INFO L225 Difference]: With dead ends: 108 [2020-07-20 05:43:14,897 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 05:43:14,899 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 05:43:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 05:43:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 05:43:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 05:43:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-20 05:43:14,914 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-20 05:43:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:14,915 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-20 05:43:14,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:43:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-20 05:43:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 05:43:14,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:14,918 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 05:43:15,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:15,133 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:15,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 05:43:15,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:15,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143748705] [2020-07-20 05:43:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:15,297 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 05:43:15,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143748705] [2020-07-20 05:43:15,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571258968] [2020-07-20 05:43:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@453b81f3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:15,331 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@453b81f3 issued 3 check-sat command(s) [2020-07-20 05:43:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:43:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:15,405 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 05:43:15,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:15,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 05:43:15,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406480034] [2020-07-20 05:43:15,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:43:15,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:43:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:43:15,408 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-20 05:43:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:15,845 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-20 05:43:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:43:15,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-20 05:43:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:15,849 INFO L225 Difference]: With dead ends: 180 [2020-07-20 05:43:15,850 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 05:43:15,852 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 05:43:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 05:43:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-20 05:43:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 05:43:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-20 05:43:15,877 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-20 05:43:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:15,878 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-20 05:43:15,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:43:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-20 05:43:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 05:43:15,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:15,882 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 05:43:16,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:16,097 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 05:43:16,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:16,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106181718] [2020-07-20 05:43:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 05:43:16,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106181718] [2020-07-20 05:43:16,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000684241] [2020-07-20 05:43:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ca28e43 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 05:43:16,322 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ca28e43 issued 3 check-sat command(s) [2020-07-20 05:43:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:43:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:16,424 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 05:43:16,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:16,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 05:43:16,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145776255] [2020-07-20 05:43:16,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:43:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:43:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:43:16,427 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-20 05:43:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:17,030 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-20 05:43:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 05:43:17,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 05:43:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:17,035 INFO L225 Difference]: With dead ends: 258 [2020-07-20 05:43:17,035 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 05:43:17,037 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 05:43:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 05:43:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-20 05:43:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 05:43:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-20 05:43:17,065 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-20 05:43:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:17,066 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-20 05:43:17,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:43:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-20 05:43:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 05:43:17,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:17,070 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 05:43:17,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 05:43:17,285 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-20 05:43:17,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:17,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814198523] [2020-07-20 05:43:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:17,526 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 05:43:17,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814198523] [2020-07-20 05:43:17,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904991683] [2020-07-20 05:43:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e66911 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:17,586 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e66911 issued 4 check-sat command(s) [2020-07-20 05:43:17,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:17,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:43:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 05:43:17,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:17,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-20 05:43:17,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895755663] [2020-07-20 05:43:17,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:43:17,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:43:17,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:43:17,669 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-07-20 05:43:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:18,178 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-07-20 05:43:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:43:18,179 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-07-20 05:43:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:18,184 INFO L225 Difference]: With dead ends: 244 [2020-07-20 05:43:18,184 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 05:43:18,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:43:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 05:43:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-07-20 05:43:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 05:43:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-07-20 05:43:18,228 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-07-20 05:43:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:18,233 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-07-20 05:43:18,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:43:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-07-20 05:43:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 05:43:18,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:18,238 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:18,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:18,453 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-07-20 05:43:18,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:18,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131635057] [2020-07-20 05:43:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-20 05:43:18,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131635057] [2020-07-20 05:43:18,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482759795] [2020-07-20 05:43:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6eaa5f57 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 05:43:18,931 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6eaa5f57 issued 4 check-sat command(s) [2020-07-20 05:43:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:43:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 49 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-07-20 05:43:19,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:19,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-07-20 05:43:19,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270415103] [2020-07-20 05:43:19,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:43:19,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:43:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:43:19,030 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-07-20 05:43:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:19,812 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-07-20 05:43:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 05:43:19,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-07-20 05:43:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:19,817 INFO L225 Difference]: With dead ends: 238 [2020-07-20 05:43:19,817 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 05:43:19,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 05:43:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 05:43:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-07-20 05:43:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 05:43:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-07-20 05:43:19,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-07-20 05:43:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:19,865 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-07-20 05:43:19,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:43:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-07-20 05:43:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 05:43:19,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:19,870 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:20,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:20,086 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-07-20 05:43:20,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:20,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363541904] [2020-07-20 05:43:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-20 05:43:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363541904] [2020-07-20 05:43:20,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739680568] [2020-07-20 05:43:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ba0369d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:20,395 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ba0369d issued 4 check-sat command(s) [2020-07-20 05:43:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:43:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 05:43:20,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:20,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-07-20 05:43:20,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175933419] [2020-07-20 05:43:20,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:43:20,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:20,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:43:20,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:43:20,480 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-07-20 05:43:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:20,986 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-07-20 05:43:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:43:20,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-07-20 05:43:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:20,990 INFO L225 Difference]: With dead ends: 228 [2020-07-20 05:43:20,991 INFO L226 Difference]: Without dead ends: 129 [2020-07-20 05:43:20,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:43:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-20 05:43:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-07-20 05:43:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 05:43:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-07-20 05:43:21,017 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-07-20 05:43:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:21,018 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-07-20 05:43:21,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:43:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-07-20 05:43:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 05:43:21,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:21,021 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:21,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 05:43:21,236 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-07-20 05:43:21,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:21,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898577669] [2020-07-20 05:43:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 05:43:21,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898577669] [2020-07-20 05:43:21,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343286916] [2020-07-20 05:43:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75b383bc 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 05:43:21,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75b383bc issued 4 check-sat command(s) [2020-07-20 05:43:21,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 05:43:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-07-20 05:43:22,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:22,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-20 05:43:22,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121288269] [2020-07-20 05:43:22,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 05:43:22,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 05:43:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 05:43:22,307 INFO L87 Difference]: Start difference. First operand 117 states and 163 transitions. Second operand 28 states. [2020-07-20 05:43:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:22,630 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2020-07-20 05:43:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:43:22,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-07-20 05:43:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:22,633 INFO L225 Difference]: With dead ends: 127 [2020-07-20 05:43:22,633 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 05:43:22,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-20 05:43:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 05:43:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-07-20 05:43:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 05:43:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-07-20 05:43:22,645 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 109 [2020-07-20 05:43:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:22,646 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-07-20 05:43:22,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 05:43:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-07-20 05:43:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-20 05:43:22,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:43:22,648 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:43:22,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:22,862 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:43:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:43:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash 648432456, now seen corresponding path program 1 times [2020-07-20 05:43:22,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:43:22,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831165438] [2020-07-20 05:43:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b4176c5 [2020-07-20 05:43:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:43:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 58 proven. 143 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 05:43:23,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831165438] [2020-07-20 05:43:23,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901266] [2020-07-20 05:43:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647fb6fc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:23,224 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@647fb6fc issued 3 check-sat command(s) [2020-07-20 05:43:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:43:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 05:43:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:43:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 166 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-20 05:43:23,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:43:23,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-07-20 05:43:23,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777158117] [2020-07-20 05:43:23,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 05:43:23,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:43:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 05:43:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:43:23,350 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand 16 states. [2020-07-20 05:43:23,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:43:23,716 INFO L93 Difference]: Finished difference Result 212 states and 310 transitions. [2020-07-20 05:43:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 05:43:23,716 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-07-20 05:43:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:43:23,717 INFO L225 Difference]: With dead ends: 212 [2020-07-20 05:43:23,717 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:43:23,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:43:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:43:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:43:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:43:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:43:23,720 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 137 [2020-07-20 05:43:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:43:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:43:23,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 05:43:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:43:23,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:43:23,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:43:23,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:43:24,679 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 15 [2020-07-20 05:43:25,076 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-07-20 05:43:25,080 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:43:25,080 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:43:25,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:43:25,081 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:43:25,081 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:43:25,081 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:43:25,081 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-20 05:43:25,082 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-20 05:43:25,082 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-20 05:43:25,082 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-20 05:43:25,082 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-20 05:43:25,083 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 05:43:25,083 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-20 05:43:25,083 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-20 05:43:25,083 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-20 05:43:25,083 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-20 05:43:25,083 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 2)) (= fibo2_~n |fibo2_#in~n|)) [2020-07-20 05:43:25,084 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-20 05:43:25,084 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) (<= |fibo2_#in~n| 3) (<= 1 |fibo2_#t~ret2|) .cse0 (<= 3 fibo2_~n)) (and (<= 5 |fibo2_#in~n|) .cse0))) [2020-07-20 05:43:25,084 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-20 05:43:25,084 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-20 05:43:25,084 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-20 05:43:25,084 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-20 05:43:25,085 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-20 05:43:25,085 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-20 05:43:25,085 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-20 05:43:25,085 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 05:43:25,085 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= 1 |fibo1_#t~ret0|)) (.cse1 (<= |fibo1_#t~ret0| 1)) (.cse2 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 fibo1_~n) .cse1 .cse2 (<= |fibo1_#in~n| 3)) (and (<= |fibo1_#in~n| 2) .cse0 (< 1 fibo1_~n) .cse1 .cse2) (and (<= 3 |fibo1_#t~ret0|) (<= 5 fibo1_~n) (<= |fibo1_#t~ret0| 3) .cse2) (and (<= |fibo1_#in~n| 4) .cse2 (<= 4 |fibo1_#in~n|)) (and (<= 6 |fibo1_#in~n|) .cse2))) [2020-07-20 05:43:25,085 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 05:43:25,086 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-20 05:43:25,086 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-20 05:43:25,086 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-20 05:43:25,086 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 05:43:25,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:43:25 BoogieIcfgContainer [2020-07-20 05:43:25,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:43:25,096 INFO L168 Benchmark]: Toolchain (without parser) took 13682.63 ms. Allocated memory was 137.4 MB in the beginning and 342.4 MB in the end (delta: 205.0 MB). Free memory was 102.3 MB in the beginning and 306.9 MB in the end (delta: -204.6 MB). Peak memory consumption was 215.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,097 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.94 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 91.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,099 INFO L168 Benchmark]: Boogie Preprocessor took 162.32 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.9 MB in the beginning and 182.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,099 INFO L168 Benchmark]: RCFGBuilder took 348.87 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,100 INFO L168 Benchmark]: TraceAbstraction took 12897.57 ms. Allocated memory was 203.9 MB in the beginning and 342.4 MB in the end (delta: 138.4 MB). Free memory was 168.9 MB in the beginning and 306.9 MB in the end (delta: -137.9 MB). Peak memory consumption was 215.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:43:25,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.94 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 91.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.32 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 91.9 MB in the beginning and 182.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.87 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12897.57 ms. Allocated memory was 203.9 MB in the beginning and 342.4 MB in the end (delta: 138.4 MB). Free memory was 168.9 MB in the beginning and 306.9 MB in the end (delta: -137.9 MB). Peak memory consumption was 215.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 389 SDtfs, 464 SDslu, 3028 SDs, 0 SdLazy, 3090 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 965 SyntacticMatches, 9 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, 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, 139 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 449 PreInvPairs, 567 NumberOfFragments, 116 HoareAnnotationTreeSize, 449 FomulaSimplifications, 3023 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3456 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1443 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1495 ConstructedInterpolants, 0 QuantifiedInterpolants, 296013 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1549 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 2292/3178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...