/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:19:49,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:19:49,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:19:49,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:19:49,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:19:49,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:19:49,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:19:49,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:19:49,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:19:49,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:19:49,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:19:49,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:19:49,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:19:49,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:19:49,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:19:49,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:19:49,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:19:49,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:19:49,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:19:49,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:19:49,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:19:49,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:19:49,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:19:49,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:19:49,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:19:49,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:19:49,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:19:49,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:19:49,349 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 00:19:49,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:19:49,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:19:49,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:19:49,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:19:49,375 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:19:49,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:19:49,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:19:49,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:19:49,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:19:49,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:19:49,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:19:49,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:19:49,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:19:49,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:19:49,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:19:49,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:19:49,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:19:49,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:19:49,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:19:49,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:19:49,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:19:49,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:19:49,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:19:49,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:19:49,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:19:49,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:19:49,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:19:49,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:19:49,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:19:49,381 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=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:19:49,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:19:49,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:19:49,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:19:49,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:19:49,740 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:19:49,740 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-19 00:19:49,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f2b2114f/db03b00f3df74f9780c928b48bcf27a8/FLAG1bdff8c77 [2020-08-19 00:19:50,185 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:19:50,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-19 00:19:50,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f2b2114f/db03b00f3df74f9780c928b48bcf27a8/FLAG1bdff8c77 [2020-08-19 00:19:50,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f2b2114f/db03b00f3df74f9780c928b48bcf27a8 [2020-08-19 00:19:50,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:19:50,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:19:50,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:19:50,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:19:50,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:19:50,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3cba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50, skipping insertion in model container [2020-08-19 00:19:50,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:19:50,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:19:50,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:19:50,784 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:19:50,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:19:50,819 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:19:50,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50 WrapperNode [2020-08-19 00:19:50,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:19:50,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:19:50,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:19:50,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:19:50,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (1/1) ... [2020-08-19 00:19:50,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:19:50,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:19:50,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:19:50,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:19:50,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (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 00:19:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:19:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:19:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 00:19:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:19:51,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:19:51,210 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:19:51,210 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 00:19:51,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:19:51 BoogieIcfgContainer [2020-08-19 00:19:51,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:19:51,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:19:51,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:19:51,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:19:51,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:19:50" (1/3) ... [2020-08-19 00:19:51,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d367dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:19:51, skipping insertion in model container [2020-08-19 00:19:51,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:19:50" (2/3) ... [2020-08-19 00:19:51,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d367dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:19:51, skipping insertion in model container [2020-08-19 00:19:51,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:19:51" (3/3) ... [2020-08-19 00:19:51,229 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-08-19 00:19:51,239 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:19:51,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:19:51,260 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:19:51,285 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:19:51,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:19:51,286 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:19:51,286 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:19:51,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:19:51,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:19:51,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:19:51,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:19:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 00:19:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 00:19:51,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:51,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:51,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:51,319 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 00:19:51,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:51,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062802791] [2020-08-19 00:19:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,612 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 00:19:51,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062802791] [2020-08-19 00:19:51,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:19:51,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 00:19:51,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467860190] [2020-08-19 00:19:51,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:19:51,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:19:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:19:51,648 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 00:19:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:51,729 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 00:19:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:19:51,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 00:19:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:51,742 INFO L225 Difference]: With dead ends: 30 [2020-08-19 00:19:51,743 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 00:19:51,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:19:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 00:19:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 00:19:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 00:19:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 00:19:51,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 00:19:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 00:19:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:19:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 00:19:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 00:19:51,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:51,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:51,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:19:51,802 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 00:19:51,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:51,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845300341] [2020-08-19 00:19:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 00:19:51,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845300341] [2020-08-19 00:19:51,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:51,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 00:19:51,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451852539] [2020-08-19 00:19:51,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:19:51,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:19:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:19:51,948 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 00:19:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:52,013 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 00:19:52,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:19:52,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 00:19:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:52,016 INFO L225 Difference]: With dead ends: 25 [2020-08-19 00:19:52,016 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 00:19:52,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:19:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 00:19:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 00:19:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 00:19:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 00:19:52,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 00:19:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:52,025 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 00:19:52,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:19:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 00:19:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:19:52,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:52,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:52,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:19:52,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 00:19:52,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:52,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904612810] [2020-08-19 00:19:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 00:19:52,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904612810] [2020-08-19 00:19:52,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:52,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:19:52,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049446508] [2020-08-19 00:19:52,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:19:52,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:19:52,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:19:52,185 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 00:19:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:52,248 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 00:19:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:19:52,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 00:19:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:52,251 INFO L225 Difference]: With dead ends: 28 [2020-08-19 00:19:52,251 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 00:19:52,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:19:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 00:19:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 00:19:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 00:19:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 00:19:52,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 00:19:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:52,259 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 00:19:52,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:19:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 00:19:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 00:19:52,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:52,261 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:52,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:19:52,262 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 00:19:52,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:52,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088741182] [2020-08-19 00:19:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 00:19:52,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088741182] [2020-08-19 00:19:52,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:52,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:19:52,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131396209] [2020-08-19 00:19:52,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:19:52,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:19:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:19:52,431 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 00:19:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:52,512 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 00:19:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 00:19:52,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 00:19:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:52,529 INFO L225 Difference]: With dead ends: 31 [2020-08-19 00:19:52,529 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 00:19:52,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:19:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 00:19:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 00:19:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 00:19:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 00:19:52,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 00:19:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:52,537 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 00:19:52,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:19:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 00:19:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 00:19:52,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:52,539 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:52,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:19:52,539 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 00:19:52,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:52,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369898722] [2020-08-19 00:19:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 00:19:52,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369898722] [2020-08-19 00:19:52,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:52,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:19:52,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344251610] [2020-08-19 00:19:52,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:19:52,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:52,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:19:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:19:52,863 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 00:19:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:52,972 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 00:19:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:19:52,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 00:19:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:52,976 INFO L225 Difference]: With dead ends: 34 [2020-08-19 00:19:52,976 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 00:19:52,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:19:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 00:19:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 00:19:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 00:19:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 00:19:52,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 00:19:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:53,003 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 00:19:53,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:19:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 00:19:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 00:19:53,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:53,006 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:53,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:19:53,006 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 00:19:53,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:53,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933611921] [2020-08-19 00:19:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 00:19:53,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933611921] [2020-08-19 00:19:53,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:53,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:19:53,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185147475] [2020-08-19 00:19:53,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:19:53,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:19:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:19:53,287 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 00:19:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:53,398 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 00:19:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:19:53,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 00:19:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:53,400 INFO L225 Difference]: With dead ends: 37 [2020-08-19 00:19:53,400 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 00:19:53,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:19:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 00:19:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 00:19:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 00:19:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 00:19:53,408 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 00:19:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:53,408 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 00:19:53,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:19:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 00:19:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 00:19:53,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:53,410 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:53,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:19:53,411 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:53,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:53,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 00:19:53,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:53,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014648308] [2020-08-19 00:19:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 00:19:53,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014648308] [2020-08-19 00:19:53,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:53,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:19:53,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375586649] [2020-08-19 00:19:53,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:19:53,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:19:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:19:53,610 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 00:19:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:53,765 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 00:19:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:19:53,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 00:19:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:53,767 INFO L225 Difference]: With dead ends: 40 [2020-08-19 00:19:53,768 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 00:19:53,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:19:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 00:19:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 00:19:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 00:19:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 00:19:53,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 00:19:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:53,776 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 00:19:53,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:19:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 00:19:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 00:19:53,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:53,777 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:53,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:19:53,778 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 00:19:53,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:53,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203643290] [2020-08-19 00:19:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 00:19:53,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203643290] [2020-08-19 00:19:54,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:54,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:19:54,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142444502] [2020-08-19 00:19:54,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:19:54,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:54,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:19:54,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:19:54,002 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 00:19:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:54,128 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 00:19:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:19:54,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 00:19:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:54,132 INFO L225 Difference]: With dead ends: 43 [2020-08-19 00:19:54,132 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 00:19:54,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:19:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 00:19:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 00:19:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 00:19:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 00:19:54,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 00:19:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:54,149 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 00:19:54,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:19:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 00:19:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 00:19:54,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:54,154 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:54,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:19:54,157 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:54,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 00:19:54,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:54,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478321553] [2020-08-19 00:19:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 00:19:54,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478321553] [2020-08-19 00:19:54,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:54,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:19:54,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989827066] [2020-08-19 00:19:54,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:19:54,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:19:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:19:54,473 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 00:19:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:54,600 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 00:19:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:19:54,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 00:19:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:54,602 INFO L225 Difference]: With dead ends: 46 [2020-08-19 00:19:54,602 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 00:19:54,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:19:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 00:19:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 00:19:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 00:19:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 00:19:54,610 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 00:19:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:54,610 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 00:19:54,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:19:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 00:19:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 00:19:54,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:54,611 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:54,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:19:54,612 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:54,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 00:19:54,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:54,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684684635] [2020-08-19 00:19:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 00:19:54,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684684635] [2020-08-19 00:19:54,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:54,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 00:19:54,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558443731] [2020-08-19 00:19:54,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 00:19:54,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 00:19:54,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:19:54,892 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 00:19:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:55,025 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 00:19:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:19:55,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 00:19:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:55,027 INFO L225 Difference]: With dead ends: 49 [2020-08-19 00:19:55,028 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 00:19:55,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 00:19:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 00:19:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 00:19:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 00:19:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 00:19:55,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 00:19:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:55,036 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 00:19:55,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 00:19:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 00:19:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 00:19:55,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:55,037 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:55,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:19:55,038 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 00:19:55,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:55,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300747336] [2020-08-19 00:19:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-19 00:19:55,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300747336] [2020-08-19 00:19:55,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:55,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 00:19:55,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732537804] [2020-08-19 00:19:55,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 00:19:55,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 00:19:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:19:55,353 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-19 00:19:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:55,519 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-19 00:19:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:19:55,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-19 00:19:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:55,522 INFO L225 Difference]: With dead ends: 52 [2020-08-19 00:19:55,522 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 00:19:55,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-19 00:19:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 00:19:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-19 00:19:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 00:19:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-19 00:19:55,529 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-19 00:19:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:55,529 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-19 00:19:55,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 00:19:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-19 00:19:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 00:19:55,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:55,531 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:55,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:19:55,531 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-19 00:19:55,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:55,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178621833] [2020-08-19 00:19:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-19 00:19:55,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178621833] [2020-08-19 00:19:55,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:55,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 00:19:55,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329968074] [2020-08-19 00:19:55,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 00:19:55,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 00:19:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:19:55,946 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-19 00:19:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:56,121 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-19 00:19:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:19:56,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-19 00:19:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:56,123 INFO L225 Difference]: With dead ends: 55 [2020-08-19 00:19:56,123 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 00:19:56,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-19 00:19:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 00:19:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-19 00:19:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 00:19:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-19 00:19:56,137 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-19 00:19:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:56,141 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-19 00:19:56,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 00:19:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-19 00:19:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 00:19:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:56,144 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:56,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:19:56,145 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-19 00:19:56,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:56,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776883214] [2020-08-19 00:19:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-19 00:19:56,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776883214] [2020-08-19 00:19:56,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:56,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 00:19:56,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354379797] [2020-08-19 00:19:56,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 00:19:56,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 00:19:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:19:56,751 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-19 00:19:56,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:56,941 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-19 00:19:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:19:56,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-19 00:19:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:56,943 INFO L225 Difference]: With dead ends: 58 [2020-08-19 00:19:56,943 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 00:19:56,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-19 00:19:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 00:19:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-19 00:19:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 00:19:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-19 00:19:56,954 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-19 00:19:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:56,954 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-19 00:19:56,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 00:19:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-19 00:19:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 00:19:56,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:56,956 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:56,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:19:56,956 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-19 00:19:56,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:56,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241066810] [2020-08-19 00:19:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:56,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-19 00:19:57,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241066810] [2020-08-19 00:19:57,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:57,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 00:19:57,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960035484] [2020-08-19 00:19:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 00:19:57,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 00:19:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:19:57,402 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-19 00:19:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:57,609 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-19 00:19:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:19:57,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-19 00:19:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:57,611 INFO L225 Difference]: With dead ends: 61 [2020-08-19 00:19:57,611 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 00:19:57,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-19 00:19:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 00:19:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-19 00:19:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 00:19:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-19 00:19:57,623 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-19 00:19:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:57,625 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-19 00:19:57,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 00:19:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-19 00:19:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 00:19:57,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:57,628 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:57,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:19:57,628 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-19 00:19:57,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:57,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693413235] [2020-08-19 00:19:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:57,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-19 00:19:58,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693413235] [2020-08-19 00:19:58,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:58,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 00:19:58,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707756799] [2020-08-19 00:19:58,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 00:19:58,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 00:19:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:19:58,217 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-19 00:19:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:19:58,416 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-19 00:19:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:19:58,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 00:19:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:19:58,417 INFO L225 Difference]: With dead ends: 64 [2020-08-19 00:19:58,418 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 00:19:58,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 00:19:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 00:19:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-19 00:19:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 00:19:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-19 00:19:58,429 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-19 00:19:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:19:58,429 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-19 00:19:58,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 00:19:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-19 00:19:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 00:19:58,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:19:58,432 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:19:58,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:19:58,433 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:19:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:19:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-19 00:19:58,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:19:58,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489497727] [2020-08-19 00:19:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:19:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:19:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:19:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:19:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:19:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-19 00:19:59,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489497727] [2020-08-19 00:19:59,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:19:59,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-19 00:19:59,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242921283] [2020-08-19 00:19:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-19 00:19:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:19:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-19 00:19:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 00:19:59,717 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-19 00:20:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:00,257 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-19 00:20:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-19 00:20:00,257 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-19 00:20:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:00,258 INFO L225 Difference]: With dead ends: 67 [2020-08-19 00:20:00,258 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 00:20:00,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-19 00:20:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 00:20:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-19 00:20:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 00:20:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-19 00:20:00,272 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-19 00:20:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:00,272 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-19 00:20:00,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-19 00:20:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-19 00:20:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 00:20:00,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:00,274 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:00,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:20:00,274 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:00,274 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-19 00:20:00,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:00,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386587032] [2020-08-19 00:20:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:20:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 00:20:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-19 00:20:00,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386587032] [2020-08-19 00:20:00,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:20:00,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 00:20:00,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842042502] [2020-08-19 00:20:00,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 00:20:00,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:00,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 00:20:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:20:00,938 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-19 00:20:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:01,961 INFO L93 Difference]: Finished difference Result 152 states and 408 transitions. [2020-08-19 00:20:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-19 00:20:01,961 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-19 00:20:01,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:01,962 INFO L225 Difference]: With dead ends: 152 [2020-08-19 00:20:01,962 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 00:20:01,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=939, Unknown=0, NotChecked=0, Total=1406 [2020-08-19 00:20:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 00:20:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 00:20:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 00:20:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 00:20:01,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-08-19 00:20:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:01,967 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 00:20:01,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 00:20:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 00:20:01,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 00:20:01,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:20:01,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 00:20:02,087 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 00:20:02,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:02,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:02,088 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 00:20:02,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 00:20:02,088 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 00:20:02,088 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-19 00:20:02,089 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-19 00:20:02,090 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-19 00:20:02,090 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-19 00:20:02,090 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-19 00:20:02,090 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-19 00:20:02,090 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-19 00:20:02,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:20:02 BoogieIcfgContainer [2020-08-19 00:20:02,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:20:02,099 INFO L168 Benchmark]: Toolchain (without parser) took 11527.55 ms. Allocated memory was 145.2 MB in the beginning and 377.0 MB in the end (delta: 231.7 MB). Free memory was 101.9 MB in the beginning and 143.9 MB in the end (delta: -41.9 MB). Peak memory consumption was 189.8 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:02,099 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 00:20:02,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.30 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:02,101 INFO L168 Benchmark]: Boogie Preprocessor took 32.05 ms. Allocated memory is still 145.2 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:02,101 INFO L168 Benchmark]: RCFGBuilder took 361.20 ms. Allocated memory was 145.2 MB in the beginning and 204.5 MB in the end (delta: 59.2 MB). Free memory was 91.1 MB in the beginning and 172.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:02,102 INFO L168 Benchmark]: TraceAbstraction took 10880.36 ms. Allocated memory was 204.5 MB in the beginning and 377.0 MB in the end (delta: 172.5 MB). Free memory was 172.7 MB in the beginning and 143.9 MB in the end (delta: 28.8 MB). Peak memory consumption was 201.3 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:02,105 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.30 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.05 ms. Allocated memory is still 145.2 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.20 ms. Allocated memory was 145.2 MB in the beginning and 204.5 MB in the end (delta: 59.2 MB). Free memory was 91.1 MB in the beginning and 172.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10880.36 ms. Allocated memory was 204.5 MB in the beginning and 377.0 MB in the end (delta: 172.5 MB). Free memory was 172.7 MB in the beginning and 143.9 MB in the end (delta: 28.8 MB). Peak memory consumption was 201.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 284 SDtfs, 396 SDslu, 2152 SDs, 0 SdLazy, 2096 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 39 PreInvPairs, 39 NumberOfFragments, 15 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 181 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1037 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1020 ConstructedInterpolants, 0 QuantifiedInterpolants, 203208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 2672/4624 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...