/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:04,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:04,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:04,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:04,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:04,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:04,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:04,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:04,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:04,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:04,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:04,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:04,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:04,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:04,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:04,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:04,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:04,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:04,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:04,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:04,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:04,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:04,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:04,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:04,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:04,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:04,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:04,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:04,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:04,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 13:18:04,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:04,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:04,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:04,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:18:04,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:04,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:04,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:04,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:04,619 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:04,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:04,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:04,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:04,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:04,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:04,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:04,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:04,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:04,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:04,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:04,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:04,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:04,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:04,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:04,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:04,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:04,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:04,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:04,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:04,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:04,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:04,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:04,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:04,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:04,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:18:04,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:04,947 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:04,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:04,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:04,955 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:04,956 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-21 13:18:05,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fdd5d4cc/28b428f0cd32416ba16f0c0667f3c435/FLAG007e1b484 [2020-08-21 13:18:05,476 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:05,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-08-21 13:18:05,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fdd5d4cc/28b428f0cd32416ba16f0c0667f3c435/FLAG007e1b484 [2020-08-21 13:18:05,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fdd5d4cc/28b428f0cd32416ba16f0c0667f3c435 [2020-08-21 13:18:05,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:05,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:05,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:05,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:05,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:05,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:05" (1/1) ... [2020-08-21 13:18:05,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559d5a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:05, skipping insertion in model container [2020-08-21 13:18:05,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:05" (1/1) ... [2020-08-21 13:18:05,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:05,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:06,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:06,068 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:06,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:06,104 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:06,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06 WrapperNode [2020-08-21 13:18:06,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:06,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:06,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:06,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:06,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... [2020-08-21 13:18:06,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:06,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:06,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:06,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:06,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 13:18:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 13:18:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 13:18:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:18:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 13:18:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 13:18:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:06,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:06,502 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:06,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:06 BoogieIcfgContainer [2020-08-21 13:18:06,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:06,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:06,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:06,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:06,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:05" (1/3) ... [2020-08-21 13:18:06,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:06, skipping insertion in model container [2020-08-21 13:18:06,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:06" (2/3) ... [2020-08-21 13:18:06,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672154dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:06, skipping insertion in model container [2020-08-21 13:18:06,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:06" (3/3) ... [2020-08-21 13:18:06,516 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-08-21 13:18:06,527 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:06,533 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:06,548 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:06,574 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:06,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:06,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:06,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:06,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:06,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:06,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:06,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 13:18:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:06,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:06,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:06,606 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 13:18:06,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:06,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954590806] [2020-08-21 13:18:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:06,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:06,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:06,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954590806] [2020-08-21 13:18:06,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:06,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:06,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042340447] [2020-08-21 13:18:06,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:06,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:06,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:06,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:06,901 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 13:18:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:07,024 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 13:18:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:07,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:07,039 INFO L225 Difference]: With dead ends: 44 [2020-08-21 13:18:07,040 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 13:18:07,048 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 [2020-08-21 13:18:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 13:18:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 13:18:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 13:18:07,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 13:18:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:07,130 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 13:18:07,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 13:18:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:18:07,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:07,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:07,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:07,140 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 13:18:07,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:07,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918788353] [2020-08-21 13:18:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:07,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918788353] [2020-08-21 13:18:07,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:07,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:07,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19192874] [2020-08-21 13:18:07,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:07,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:07,292 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 13:18:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:07,359 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 13:18:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:07,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 13:18:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:07,362 INFO L225 Difference]: With dead ends: 36 [2020-08-21 13:18:07,362 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 13:18:07,363 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 [2020-08-21 13:18:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 13:18:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 13:18:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 13:18:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 13:18:07,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 13:18:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:07,374 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 13:18:07,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 13:18:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:18:07,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:07,376 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] [2020-08-21 13:18:07,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:07,377 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 13:18:07,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:07,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605172160] [2020-08-21 13:18:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:18:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 13:18:07,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605172160] [2020-08-21 13:18:07,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:07,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:07,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675658594] [2020-08-21 13:18:07,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:07,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:07,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:07,497 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 13:18:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:07,582 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 13:18:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:18:07,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 13:18:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:07,584 INFO L225 Difference]: With dead ends: 58 [2020-08-21 13:18:07,584 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 13:18:07,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 13:18:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 13:18:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 13:18:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 13:18:07,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 13:18:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:07,596 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 13:18:07,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 13:18:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:18:07,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:07,599 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] [2020-08-21 13:18:07,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:07,599 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 13:18:07,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:07,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874437932] [2020-08-21 13:18:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 13:18:07,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874437932] [2020-08-21 13:18:07,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:07,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:18:07,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12822426] [2020-08-21 13:18:07,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:18:07,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:18:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:07,719 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 13:18:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:07,903 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 13:18:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:07,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 13:18:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:07,907 INFO L225 Difference]: With dead ends: 54 [2020-08-21 13:18:07,907 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 13:18:07,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 13:18:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 13:18:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 13:18:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 13:18:07,921 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 13:18:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:07,922 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 13:18:07,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:18:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 13:18:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 13:18:07,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:07,925 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] [2020-08-21 13:18:07,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:07,926 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 13:18:07,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:07,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664839724] [2020-08-21 13:18:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:07,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 13:18:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:18:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:18:08,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664839724] [2020-08-21 13:18:08,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:08,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:18:08,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002625908] [2020-08-21 13:18:08,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:18:08,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:08,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:18:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:18:08,057 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 13:18:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:08,133 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 13:18:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:18:08,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 13:18:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:08,135 INFO L225 Difference]: With dead ends: 94 [2020-08-21 13:18:08,135 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 13:18:08,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:18:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 13:18:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 13:18:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 13:18:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 13:18:08,149 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 13:18:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:08,150 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 13:18:08,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:18:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 13:18:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 13:18:08,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:08,153 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] [2020-08-21 13:18:08,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:08,153 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 13:18:08,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:08,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165001728] [2020-08-21 13:18:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 13:18:08,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165001728] [2020-08-21 13:18:08,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:08,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:08,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735991338] [2020-08-21 13:18:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:08,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:08,309 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 13:18:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:08,433 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 13:18:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:18:08,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 13:18:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:08,435 INFO L225 Difference]: With dead ends: 103 [2020-08-21 13:18:08,435 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 13:18:08,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 13:18:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 13:18:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 13:18:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 13:18:08,449 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 13:18:08,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:08,449 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 13:18:08,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 13:18:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 13:18:08,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:08,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-08-21 13:18:08,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:18:08,456 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 13:18:08,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:08,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317813580] [2020-08-21 13:18:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 13:18:08,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317813580] [2020-08-21 13:18:08,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:08,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:08,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670654261] [2020-08-21 13:18:08,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:08,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:08,579 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 13:18:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:08,773 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 13:18:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 13:18:08,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 13:18:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:08,776 INFO L225 Difference]: With dead ends: 86 [2020-08-21 13:18:08,776 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 13:18:08,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 13:18:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 13:18:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 13:18:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 13:18:08,802 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 13:18:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:08,804 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 13:18:08,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 13:18:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 13:18:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:08,812 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] [2020-08-21 13:18:08,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:18:08,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 13:18:08,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:08,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818486313] [2020-08-21 13:18:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 13:18:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 13:18:09,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818486313] [2020-08-21 13:18:09,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:09,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:09,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873752199] [2020-08-21 13:18:09,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:09,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:09,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:09,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:09,009 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 13:18:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:09,135 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 13:18:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:18:09,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 13:18:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:09,139 INFO L225 Difference]: With dead ends: 167 [2020-08-21 13:18:09,139 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 13:18:09,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 13:18:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 13:18:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 13:18:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 13:18:09,157 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 13:18:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:09,158 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 13:18:09,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 13:18:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:18:09,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:09,161 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:09,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:18:09,161 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 13:18:09,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:09,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451393477] [2020-08-21 13:18:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 13:18:09,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451393477] [2020-08-21 13:18:09,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:09,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:18:09,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414990412] [2020-08-21 13:18:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:18:09,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:18:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:09,313 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 13:18:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:09,527 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 13:18:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:18:09,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 13:18:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:09,530 INFO L225 Difference]: With dead ends: 188 [2020-08-21 13:18:09,530 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 13:18:09,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 13:18:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 13:18:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 13:18:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 13:18:09,547 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 13:18:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:09,548 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 13:18:09,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:18:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 13:18:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 13:18:09,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:09,550 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:09,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:18:09,550 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 13:18:09,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:09,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977205016] [2020-08-21 13:18:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 13:18:09,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977205016] [2020-08-21 13:18:09,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:09,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:18:09,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050172546] [2020-08-21 13:18:09,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:18:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:18:09,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:09,867 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 13:18:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:10,292 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 13:18:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:18:10,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 13:18:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:10,295 INFO L225 Difference]: With dead ends: 199 [2020-08-21 13:18:10,295 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 13:18:10,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:18:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 13:18:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-21 13:18:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 13:18:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-21 13:18:10,318 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-21 13:18:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:10,319 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-21 13:18:10,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:18:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-21 13:18:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 13:18:10,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:10,321 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:10,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:18:10,321 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-21 13:18:10,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:10,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948295183] [2020-08-21 13:18:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 13:18:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 13:18:10,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948295183] [2020-08-21 13:18:10,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:10,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:18:10,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447446506] [2020-08-21 13:18:10,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:18:10,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:18:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:18:10,624 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-21 13:18:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:10,810 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-21 13:18:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:10,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 13:18:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:10,812 INFO L225 Difference]: With dead ends: 142 [2020-08-21 13:18:10,813 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 13:18:10,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 13:18:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 13:18:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 13:18:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-21 13:18:10,828 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-21 13:18:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:10,831 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-21 13:18:10,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:18:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-21 13:18:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 13:18:10,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:10,837 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:10,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:18:10,838 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-21 13:18:10,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:10,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060541573] [2020-08-21 13:18:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:10,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 13:18:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 13:18:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 13:18:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-21 13:18:11,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060541573] [2020-08-21 13:18:11,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:11,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:18:11,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76581431] [2020-08-21 13:18:11,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:18:11,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:18:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:18:11,456 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-21 13:18:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:12,029 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-21 13:18:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 13:18:12,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-21 13:18:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:12,032 INFO L225 Difference]: With dead ends: 184 [2020-08-21 13:18:12,032 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 13:18:12,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:18:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 13:18:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-21 13:18:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 13:18:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-21 13:18:12,042 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-21 13:18:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:12,043 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-21 13:18:12,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:18:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-21 13:18:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 13:18:12,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:12,046 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, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:12,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:18:12,046 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-21 13:18:12,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:12,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074097147] [2020-08-21 13:18:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 13:18:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-21 13:18:12,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074097147] [2020-08-21 13:18:12,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:12,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:12,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852719073] [2020-08-21 13:18:12,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:12,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:12,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:12,339 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-21 13:18:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:12,607 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-21 13:18:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:12,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 13:18:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:12,612 INFO L225 Difference]: With dead ends: 188 [2020-08-21 13:18:12,613 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 13:18:12,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 13:18:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-21 13:18:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 13:18:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-21 13:18:12,627 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-21 13:18:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:12,628 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-21 13:18:12,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-21 13:18:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 13:18:12,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:12,632 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:12,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:18:12,633 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-21 13:18:12,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:12,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776748731] [2020-08-21 13:18:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:12,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 13:18:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-21 13:18:13,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776748731] [2020-08-21 13:18:13,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:13,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:18:13,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67820108] [2020-08-21 13:18:13,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:18:13,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:18:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:13,125 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-21 13:18:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:13,668 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-21 13:18:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 13:18:13,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-21 13:18:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:13,675 INFO L225 Difference]: With dead ends: 217 [2020-08-21 13:18:13,676 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 13:18:13,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:18:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 13:18:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-21 13:18:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 13:18:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-21 13:18:13,693 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-21 13:18:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:13,694 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-21 13:18:13,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:18:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-21 13:18:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 13:18:13,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:13,696 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:13,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:18:13,697 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-21 13:18:13,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:13,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965979872] [2020-08-21 13:18:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:13,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 13:18:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-21 13:18:14,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965979872] [2020-08-21 13:18:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:18:14,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320718316] [2020-08-21 13:18:14,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:18:14,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:18:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:14,082 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-21 13:18:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:14,516 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-21 13:18:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:18:14,516 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-21 13:18:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:14,519 INFO L225 Difference]: With dead ends: 211 [2020-08-21 13:18:14,519 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 13:18:14,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:18:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 13:18:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-21 13:18:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 13:18:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-21 13:18:14,529 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-21 13:18:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:14,529 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-21 13:18:14,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:18:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-21 13:18:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-21 13:18:14,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:14,532 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:14,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:18:14,533 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-21 13:18:14,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:14,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90947442] [2020-08-21 13:18:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 13:18:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-08-21 13:18:15,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90947442] [2020-08-21 13:18:15,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:15,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 13:18:15,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656351709] [2020-08-21 13:18:15,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 13:18:15,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 13:18:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:18:15,548 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand 28 states. [2020-08-21 13:18:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:16,109 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2020-08-21 13:18:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 13:18:16,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 177 [2020-08-21 13:18:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:16,114 INFO L225 Difference]: With dead ends: 124 [2020-08-21 13:18:16,114 INFO L226 Difference]: Without dead ends: 120 [2020-08-21 13:18:16,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 13:18:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-21 13:18:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-08-21 13:18:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-21 13:18:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2020-08-21 13:18:16,125 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 177 [2020-08-21 13:18:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:16,126 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2020-08-21 13:18:16,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 13:18:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2020-08-21 13:18:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-08-21 13:18:16,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:16,129 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:16,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:18:16,129 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 5 times [2020-08-21 13:18:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:16,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750199183] [2020-08-21 13:18:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 13:18:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2020-08-21 13:18:16,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750199183] [2020-08-21 13:18:16,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:16,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:18:16,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785423399] [2020-08-21 13:18:16,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:18:16,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:16,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:18:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:18:16,677 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand 16 states. [2020-08-21 13:18:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:17,397 INFO L93 Difference]: Finished difference Result 245 states and 365 transitions. [2020-08-21 13:18:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 13:18:17,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2020-08-21 13:18:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:17,401 INFO L225 Difference]: With dead ends: 245 [2020-08-21 13:18:17,401 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 13:18:17,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 13:18:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 13:18:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2020-08-21 13:18:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 13:18:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 159 transitions. [2020-08-21 13:18:17,418 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 159 transitions. Word has length 218 [2020-08-21 13:18:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:17,420 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 159 transitions. [2020-08-21 13:18:17,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:18:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 159 transitions. [2020-08-21 13:18:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-08-21 13:18:17,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:17,425 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 16, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:17,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:18:17,425 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -806788011, now seen corresponding path program 6 times [2020-08-21 13:18:17,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:17,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19949171] [2020-08-21 13:18:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 13:18:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-21 13:18:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:17,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 177 proven. 317 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked. [2020-08-21 13:18:18,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19949171] [2020-08-21 13:18:18,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:18,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:18,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172339475] [2020-08-21 13:18:18,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:18,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:18,136 INFO L87 Difference]: Start difference. First operand 120 states and 159 transitions. Second operand 11 states. [2020-08-21 13:18:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:18,456 INFO L93 Difference]: Finished difference Result 233 states and 321 transitions. [2020-08-21 13:18:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:18:18,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 260 [2020-08-21 13:18:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:18,458 INFO L225 Difference]: With dead ends: 233 [2020-08-21 13:18:18,458 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 13:18:18,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:18:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 13:18:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-08-21 13:18:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 13:18:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2020-08-21 13:18:18,467 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 260 [2020-08-21 13:18:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:18,468 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2020-08-21 13:18:18,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2020-08-21 13:18:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-21 13:18:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:18,473 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:18,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:18:18,473 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1614185823, now seen corresponding path program 7 times [2020-08-21 13:18:18,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:18,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379276753] [2020-08-21 13:18:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 13:18:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-21 13:18:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:18:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 13:18:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 13:18:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 13:18:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:18:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 132 proven. 466 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2020-08-21 13:18:19,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379276753] [2020-08-21 13:18:19,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:19,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:18:19,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23435606] [2020-08-21 13:18:19,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:18:19,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:18:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:18:19,128 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand 12 states. [2020-08-21 13:18:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:19,433 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2020-08-21 13:18:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:18:19,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 286 [2020-08-21 13:18:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:19,435 INFO L225 Difference]: With dead ends: 141 [2020-08-21 13:18:19,435 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:18:19,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:18:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:18:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:18:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:18:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:18:19,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 286 [2020-08-21 13:18:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:19,438 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:18:19,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:18:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:18:19,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:18:19,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:18:19,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:18:20,473 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29 [2020-08-21 13:18:21,120 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2020-08-21 13:18:21,124 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:18:21,124 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:21,124 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:21,124 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:18:21,124 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:18:21,124 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 6 main_~x~0) (<= main_~x~0 6)) [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 13:18:21,125 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 13:18:21,126 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 13:18:21,127 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-08-21 13:18:21,127 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 13:18:21,128 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 4) (<= |fibo2_#t~ret2| 2) .cse0) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) .cse0 (<= 5 |fibo2_#in~n|)) (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 2)))) (not (<= |fibo2_#in~n| 1))) [2020-08-21 13:18:21,128 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 13:18:21,128 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 13:18:21,128 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 13:18:21,129 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 13:18:21,129 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 13:18:21,129 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 13:18:21,129 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 13:18:21,130 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 13:18:21,130 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 3)) (not (<= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 |fibo1_#in~n|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 5) .cse0) (and (<= fibo1_~n 5) .cse0) (and (<= 7 |fibo1_#in~n|) .cse0)))) [2020-08-21 13:18:21,131 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 13:18:21,131 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 13:18:21,131 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 13:18:21,131 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 13:18:21,131 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 13:18:21,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:18:21 BoogieIcfgContainer [2020-08-21 13:18:21,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:18:21,138 INFO L168 Benchmark]: Toolchain (without parser) took 15287.29 ms. Allocated memory was 146.3 MB in the beginning and 471.9 MB in the end (delta: 325.6 MB). Free memory was 103.4 MB in the beginning and 208.3 MB in the end (delta: -104.8 MB). Peak memory consumption was 300.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,139 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.78 ms. Allocated memory is still 146.3 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,140 INFO L168 Benchmark]: Boogie Preprocessor took 120.93 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 93.2 MB in the beginning and 183.7 MB in the end (delta: -90.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,140 INFO L168 Benchmark]: RCFGBuilder took 280.90 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 170.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,141 INFO L168 Benchmark]: TraceAbstraction took 14627.81 ms. Allocated memory was 205.0 MB in the beginning and 471.9 MB in the end (delta: 266.9 MB). Free memory was 169.7 MB in the beginning and 208.3 MB in the end (delta: -38.5 MB). Peak memory consumption was 308.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:21,146 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.78 ms. Allocated memory is still 146.3 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.93 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 93.2 MB in the beginning and 183.7 MB in the end (delta: -90.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.90 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 170.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14627.81 ms. Allocated memory was 205.0 MB in the beginning and 471.9 MB in the end (delta: 266.9 MB). Free memory was 169.7 MB in the beginning and 208.3 MB in the end (delta: -38.5 MB). Peak memory consumption was 308.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.8s, OverallIterations: 19, TraceHistogramMax: 21, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 635 SDtfs, 595 SDslu, 4388 SDs, 0 SdLazy, 4304 SolverSat, 453 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 98 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 647 PreInvPairs, 912 NumberOfFragments, 138 HoareAnnotationTreeSize, 647 FomulaSimplifications, 2845 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4707 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2097 NumberOfCodeBlocks, 2097 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2078 ConstructedInterpolants, 0 QuantifiedInterpolants, 641722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 6946/9383 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...