/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:31:10,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:31:10,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:31:10,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:31:10,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:31:10,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:31:10,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:31:10,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:31:10,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:31:10,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:31:10,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:31:10,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:31:10,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:31:10,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:31:10,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:31:10,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:31:10,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:31:10,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:31:10,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:31:10,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:31:10,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:31:10,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:31:10,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:31:10,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:31:10,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:31:10,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:31:10,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:31:10,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:31:10,244 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 [2020-08-19 04:31:10,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:31:10,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:31:10,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:31:10,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:31:10,293 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:31:10,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:31:10,293 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:31:10,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:31:10,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:31:10,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:31:10,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:31:10,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:31:10,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:31:10,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:31:10,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:31:10,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:31:10,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:31:10,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:31:10,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:31:10,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:31:10,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:31:10,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:31:10,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:31:10,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:31:10,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:31:10,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:31:10,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:31:10,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:31:10,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:31:10,299 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:31:10,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:31:10,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:31:10,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:31:10,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:31:10,624 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:31:10,625 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-19 04:31:10,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/174c11e70/5136d01cdc4e46eaa1a35b9267758b0a/FLAGc17633bf7 [2020-08-19 04:31:11,148 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:31:11,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-08-19 04:31:11,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/174c11e70/5136d01cdc4e46eaa1a35b9267758b0a/FLAGc17633bf7 [2020-08-19 04:31:11,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/174c11e70/5136d01cdc4e46eaa1a35b9267758b0a [2020-08-19 04:31:11,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:31:11,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:31:11,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:11,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:31:11,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:31:11,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a5289c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11, skipping insertion in model container [2020-08-19 04:31:11,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:31:11,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:31:11,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:11,730 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:31:11,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:11,764 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:31:11,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11 WrapperNode [2020-08-19 04:31:11,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:11,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:31:11,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:31:11,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:31:11,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (1/1) ... [2020-08-19 04:31:11,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:31:11,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:31:11,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:31:11,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:31:11,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (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 [2020-08-19 04:31:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:31:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:31:11,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 04:31:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:31:11,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:31:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:31:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 04:31:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 04:31:11,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:31:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:31:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:31:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:31:11,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:31:12,178 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:31:12,179 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 04:31:12,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:12 BoogieIcfgContainer [2020-08-19 04:31:12,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:31:12,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:31:12,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:31:12,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:31:12,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:31:11" (1/3) ... [2020-08-19 04:31:12,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae18770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:12, skipping insertion in model container [2020-08-19 04:31:12,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:11" (2/3) ... [2020-08-19 04:31:12,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae18770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:12, skipping insertion in model container [2020-08-19 04:31:12,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:12" (3/3) ... [2020-08-19 04:31:12,192 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-08-19 04:31:12,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:31:12,216 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:31:12,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:31:12,285 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:31:12,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:31:12,285 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:31:12,285 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:31:12,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:31:12,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:31:12,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:31:12,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:31:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 04:31:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 04:31:12,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:12,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:12,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-08-19 04:31:12,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:12,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162415805] [2020-08-19 04:31:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:12,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162415805] [2020-08-19 04:31:12,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:12,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 04:31:12,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115666686] [2020-08-19 04:31:12,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 04:31:12,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 04:31:12,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 04:31:12,475 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-08-19 04:31:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:12,503 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-08-19 04:31:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 04:31:12,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-19 04:31:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:12,514 INFO L225 Difference]: With dead ends: 61 [2020-08-19 04:31:12,514 INFO L226 Difference]: Without dead ends: 29 [2020-08-19 04:31:12,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 04:31:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-19 04:31:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-19 04:31:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 04:31:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-08-19 04:31:12,566 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-08-19 04:31:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:12,566 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-08-19 04:31:12,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 04:31:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-08-19 04:31:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 04:31:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:12,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:12,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:31:12,569 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:12,569 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-08-19 04:31:12,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:12,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077629011] [2020-08-19 04:31:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:12,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:12,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077629011] [2020-08-19 04:31:12,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:12,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:31:12,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111275013] [2020-08-19 04:31:12,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:31:12,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:12,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:31:12,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:31:12,816 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-08-19 04:31:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:12,950 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-19 04:31:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:31:12,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-19 04:31:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:12,952 INFO L225 Difference]: With dead ends: 35 [2020-08-19 04:31:12,952 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 04:31:12,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 04:31:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 04:31:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:31:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-08-19 04:31:12,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-08-19 04:31:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:12,967 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-08-19 04:31:12,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:31:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-08-19 04:31:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:31:12,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:12,969 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:12,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:31:12,969 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:12,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-08-19 04:31:12,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:12,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035116743] [2020-08-19 04:31:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 04:31:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:13,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035116743] [2020-08-19 04:31:13,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:13,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:31:13,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206162786] [2020-08-19 04:31:13,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:31:13,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:31:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:13,071 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-08-19 04:31:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:13,203 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-19 04:31:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:31:13,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-19 04:31:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:13,206 INFO L225 Difference]: With dead ends: 48 [2020-08-19 04:31:13,206 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 04:31:13,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:31:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 04:31:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-19 04:31:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 04:31:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-19 04:31:13,220 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-08-19 04:31:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:13,221 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-19 04:31:13,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:31:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-19 04:31:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 04:31:13,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:13,223 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:13,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:31:13,224 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-08-19 04:31:13,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:13,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886568104] [2020-08-19 04:31:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 04:31:13,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886568104] [2020-08-19 04:31:13,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:13,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:31:13,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055037753] [2020-08-19 04:31:13,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:31:13,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:31:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:13,340 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-08-19 04:31:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:13,474 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-08-19 04:31:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:31:13,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-19 04:31:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:13,476 INFO L225 Difference]: With dead ends: 55 [2020-08-19 04:31:13,476 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 04:31:13,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:31:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 04:31:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-08-19 04:31:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 04:31:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-08-19 04:31:13,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-08-19 04:31:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:13,490 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-08-19 04:31:13,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:31:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-08-19 04:31:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 04:31:13,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:13,491 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:13,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:31:13,492 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:13,492 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-08-19 04:31:13,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:13,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109105673] [2020-08-19 04:31:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 04:31:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 04:31:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:31:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 04:31:13,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109105673] [2020-08-19 04:31:13,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:13,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 04:31:13,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690900037] [2020-08-19 04:31:13,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:31:13,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:31:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:31:13,612 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-08-19 04:31:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:13,786 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-08-19 04:31:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:31:13,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-08-19 04:31:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:13,788 INFO L225 Difference]: With dead ends: 70 [2020-08-19 04:31:13,788 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 04:31:13,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:31:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 04:31:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 04:31:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 04:31:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-08-19 04:31:13,802 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-08-19 04:31:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:13,802 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-08-19 04:31:13,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:31:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-08-19 04:31:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 04:31:13,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:13,804 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:13,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:31:13,804 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-08-19 04:31:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:13,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920813749] [2020-08-19 04:31:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-19 04:31:13,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920813749] [2020-08-19 04:31:13,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:13,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:31:13,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13516869] [2020-08-19 04:31:13,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:31:13,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:31:13,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:31:13,901 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states. [2020-08-19 04:31:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:14,085 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-08-19 04:31:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:31:14,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-19 04:31:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:14,088 INFO L225 Difference]: With dead ends: 72 [2020-08-19 04:31:14,088 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 04:31:14,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:31:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 04:31:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2020-08-19 04:31:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 04:31:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-08-19 04:31:14,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-08-19 04:31:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:14,102 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-08-19 04:31:14,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:31:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-08-19 04:31:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 04:31:14,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:14,104 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1] [2020-08-19 04:31:14,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:31:14,105 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-08-19 04:31:14,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:14,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742102793] [2020-08-19 04:31:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:31:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 04:31:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 04:31:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:31:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 04:31:14,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742102793] [2020-08-19 04:31:14,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:14,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:31:14,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402680344] [2020-08-19 04:31:14,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:31:14,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:31:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:31:14,270 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 9 states. [2020-08-19 04:31:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:14,677 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-08-19 04:31:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:31:14,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-08-19 04:31:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:14,682 INFO L225 Difference]: With dead ends: 96 [2020-08-19 04:31:14,682 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 04:31:14,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:31:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 04:31:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-08-19 04:31:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 04:31:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-08-19 04:31:14,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 56 [2020-08-19 04:31:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:14,713 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-08-19 04:31:14,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:31:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-08-19 04:31:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-19 04:31:14,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:14,715 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:14,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:31:14,716 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-08-19 04:31:14,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:14,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039131137] [2020-08-19 04:31:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:31:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:31:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:31:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:31:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-19 04:31:14,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039131137] [2020-08-19 04:31:14,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:14,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:31:14,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158030408] [2020-08-19 04:31:14,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:31:14,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:31:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:31:14,896 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-08-19 04:31:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,097 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-08-19 04:31:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:31:15,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-19 04:31:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,102 INFO L225 Difference]: With dead ends: 89 [2020-08-19 04:31:15,105 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 04:31:15,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:31:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 04:31:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-08-19 04:31:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-19 04:31:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-08-19 04:31:15,131 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 58 [2020-08-19 04:31:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,132 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-08-19 04:31:15,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:31:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-08-19 04:31:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 04:31:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,138 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 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, 1] [2020-08-19 04:31:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:31:15,138 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash 269972457, now seen corresponding path program 2 times [2020-08-19 04:31:15,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932595493] [2020-08-19 04:31:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:31:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:31:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:31:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:31:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 04:31:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:31:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 04:31:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 04:31:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-08-19 04:31:15,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932595493] [2020-08-19 04:31:15,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:31:15,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447275647] [2020-08-19 04:31:15,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:31:15,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:31:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:31:15,339 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-08-19 04:31:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,496 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-19 04:31:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:31:15,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-08-19 04:31:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,503 INFO L225 Difference]: With dead ends: 88 [2020-08-19 04:31:15,503 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 04:31:15,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:31:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 04:31:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-08-19 04:31:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 04:31:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-19 04:31:15,520 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 81 [2020-08-19 04:31:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,520 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-19 04:31:15,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:31:15,520 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-19 04:31:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 04:31:15,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,524 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:31:15,524 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times [2020-08-19 04:31:15,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696714280] [2020-08-19 04:31:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:31:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:31:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:31:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:31:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 04:31:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 04:31:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:31:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 04:31:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-19 04:31:15,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696714280] [2020-08-19 04:31:15,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:31:15,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314882185] [2020-08-19 04:31:15,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:31:15,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:31:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:31:15,700 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2020-08-19 04:31:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,975 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-08-19 04:31:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:31:15,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-08-19 04:31:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,978 INFO L225 Difference]: With dead ends: 92 [2020-08-19 04:31:15,978 INFO L226 Difference]: Without dead ends: 90 [2020-08-19 04:31:15,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:31:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-19 04:31:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-08-19 04:31:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 04:31:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-08-19 04:31:15,990 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 83 [2020-08-19 04:31:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,991 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-08-19 04:31:15,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:31:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-08-19 04:31:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-19 04:31:15,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,993 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:31:15,993 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times [2020-08-19 04:31:15,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857874300] [2020-08-19 04:31:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:31:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-19 04:31:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:31:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:31:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:31:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:31:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:31:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 04:31:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 04:31:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:31:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 04:31:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 04:31:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 04:31:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 04:31:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 04:31:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2020-08-19 04:31:16,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857874300] [2020-08-19 04:31:16,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:16,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:31:16,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250212200] [2020-08-19 04:31:16,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:31:16,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:31:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:31:16,268 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 13 states. [2020-08-19 04:31:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:16,441 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-08-19 04:31:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:31:16,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2020-08-19 04:31:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:16,442 INFO L225 Difference]: With dead ends: 83 [2020-08-19 04:31:16,442 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:31:16,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:31:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:31:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:31:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:31:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:31:16,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2020-08-19 04:31:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:16,444 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:31:16,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:31:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:31:16,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:31:16,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:31:16,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:31:16,913 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:31:16,913 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:31:16,913 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:31:16,914 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:16,914 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-19 04:31:16,915 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-08-19 04:31:16,915 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-08-19 04:31:16,915 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,915 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-19 04:31:16,915 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-19 04:31:16,915 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-08-19 04:31:16,916 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,916 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,916 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-08-19 04:31:16,916 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-08-19 04:31:16,916 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-08-19 04:31:16,916 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-19 04:31:16,917 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,917 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,917 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-08-19 04:31:16,917 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (< main_~buf~0 main_~buflim~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,917 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-08-19 04:31:16,918 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-08-19 04:31:16,918 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-19 04:31:16,918 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-19 04:31:16,918 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-19 04:31:16,918 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 0 main_~buf~0) (< main_~buf~0 (+ main_~buflim~0 1)) (<= (+ main_~buflim~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~in~0 main_~buflim~0 3) (+ main_~buf~0 main_~inlen~0)) (<= (+ main_~bufferlen~0 1) main_~inlen~0)) [2020-08-19 04:31:16,918 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 04:31:16,919 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 04:31:16,919 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 04:31:16,919 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 04:31:16,919 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 04:31:16,919 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 04:31:16,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:31:16 BoogieIcfgContainer [2020-08-19 04:31:16,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:31:16,942 INFO L168 Benchmark]: Toolchain (without parser) took 5415.78 ms. Allocated memory was 142.6 MB in the beginning and 273.7 MB in the end (delta: 131.1 MB). Free memory was 105.8 MB in the beginning and 238.1 MB in the end (delta: -132.3 MB). Peak memory consumption was 131.9 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,943 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:31:16,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.19 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 95.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,944 INFO L168 Benchmark]: Boogie Preprocessor took 115.75 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 95.8 MB in the beginning and 183.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,945 INFO L168 Benchmark]: RCFGBuilder took 301.71 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 168.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,946 INFO L168 Benchmark]: TraceAbstraction took 4754.29 ms. Allocated memory was 204.5 MB in the beginning and 273.7 MB in the end (delta: 69.2 MB). Free memory was 167.6 MB in the beginning and 238.1 MB in the end (delta: -70.5 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.19 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 95.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.75 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 95.8 MB in the beginning and 183.7 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.71 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 168.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4754.29 ms. Allocated memory was 204.5 MB in the beginning and 273.7 MB in the end (delta: 69.2 MB). Free memory was 167.6 MB in the beginning and 238.1 MB in the end (delta: -70.5 MB). Peak memory consumption was 131.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= buf && buf < buflim + 1) && buflim + 2 <= bufferlen) && in + buflim + 3 <= buf + inlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 11, TraceHistogramMax: 16, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 422 SDtfs, 351 SDslu, 1324 SDs, 0 SdLazy, 750 SolverSat, 329 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 91 NumberOfFragments, 206 HoareAnnotationTreeSize, 54 FomulaSimplifications, 1422 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 111624 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1182/1281 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...