/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:50:49,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:50:49,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:50:49,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:50:49,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:50:49,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:50:49,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:50:49,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:50:49,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:50:49,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:50:49,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:50:49,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:50:49,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:50:49,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:50:49,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:50:49,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:50:49,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:50:49,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:50:49,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:50:49,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:50:49,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:50:49,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:50:49,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:50:49,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:50:49,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:50:49,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:50:49,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:50:49,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:50:49,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:50:49,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-27 21:50:49,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:50:49,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:50:49,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:50:49,621 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 [2020-08-27 21:50:49,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:50:49,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:50:49,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:50:49,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:50:49,672 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:50:49,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:50:49,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:50:49,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:50:49,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:50:49,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:50:49,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:50:49,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:50:49,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:50:49,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:50:49,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:50:49,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:50:49,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:50:49,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:50:49,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:50:49,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:50:49,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:50:49,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:50:49,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:50:49,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:50:49,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:50:49,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:50:49,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:50:49,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:50:49,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:50:49,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:50:50,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:50:50,166 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:50:50,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:50:50,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:50:50,176 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:50:50,178 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-27 21:50:50,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34911f7b7/9a00b28d3f574f9491a57b5d6a4375dc/FLAGfcea22b7c [2020-08-27 21:50:50,872 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:50:50,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-27 21:50:50,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34911f7b7/9a00b28d3f574f9491a57b5d6a4375dc/FLAGfcea22b7c [2020-08-27 21:50:51,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34911f7b7/9a00b28d3f574f9491a57b5d6a4375dc [2020-08-27 21:50:51,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:50:51,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:50:51,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:51,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:50:51,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:50:51,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e09f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51, skipping insertion in model container [2020-08-27 21:50:51,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:50:51,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:50:51,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:51,466 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:50:51,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:50:51,509 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:50:51,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51 WrapperNode [2020-08-27 21:50:51,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:50:51,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:50:51,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:50:51,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:50:51,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (1/1) ... [2020-08-27 21:50:51,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:50:51,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:50:51,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:50:51,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:50:51,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (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 [2020-08-27 21:50:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:50:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:50:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:50:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:50:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:50:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:50:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:50:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:50:52,006 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:50:52,006 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:50:52,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:52 BoogieIcfgContainer [2020-08-27 21:50:52,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:50:52,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:50:52,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:50:52,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:50:52,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:50:51" (1/3) ... [2020-08-27 21:50:52,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:52, skipping insertion in model container [2020-08-27 21:50:52,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:50:51" (2/3) ... [2020-08-27 21:50:52,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:50:52, skipping insertion in model container [2020-08-27 21:50:52,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:50:52" (3/3) ... [2020-08-27 21:50:52,035 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-27 21:50:52,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:50:52,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:50:52,075 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:50:52,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:50:52,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:50:52,101 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:50:52,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:50:52,102 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:50:52,102 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:50:52,102 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:50:52,102 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:50:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-27 21:50:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-27 21:50:52,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,132 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-27 21:50:52,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12046498] [2020-08-27 21:50:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12046498] [2020-08-27 21:50:52,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717771705] [2020-08-27 21:50:52,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,391 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-27 21:50:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,455 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-27 21:50:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-27 21:50:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,476 INFO L225 Difference]: With dead ends: 57 [2020-08-27 21:50:52,476 INFO L226 Difference]: Without dead ends: 42 [2020-08-27 21:50:52,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-27 21:50:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-27 21:50:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:50:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-27 21:50:52,532 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-27 21:50:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,533 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-27 21:50:52,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-27 21:50:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-27 21:50:52,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:50:52,535 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-27 21:50:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714503053] [2020-08-27 21:50:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714503053] [2020-08-27 21:50:52,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515307544] [2020-08-27 21:50:52,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,590 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-27 21:50:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,642 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-27 21:50:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-27 21:50:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,645 INFO L225 Difference]: With dead ends: 67 [2020-08-27 21:50:52,645 INFO L226 Difference]: Without dead ends: 42 [2020-08-27 21:50:52,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-27 21:50:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-27 21:50:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-27 21:50:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-27 21:50:52,664 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-27 21:50:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,665 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-27 21:50:52,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,665 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-27 21:50:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:50:52,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:50:52,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-27 21:50:52,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305894105] [2020-08-27 21:50:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305894105] [2020-08-27 21:50:52,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171459060] [2020-08-27 21:50:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,717 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-27 21:50:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,739 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-27 21:50:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-27 21:50:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,742 INFO L225 Difference]: With dead ends: 63 [2020-08-27 21:50:52,742 INFO L226 Difference]: Without dead ends: 45 [2020-08-27 21:50:52,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-27 21:50:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-27 21:50:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-27 21:50:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-27 21:50:52,751 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-27 21:50:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,751 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-27 21:50:52,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-27 21:50:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:50:52,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:50:52,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-27 21:50:52,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805296323] [2020-08-27 21:50:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805296323] [2020-08-27 21:50:52,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583068288] [2020-08-27 21:50:52,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,802 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-27 21:50:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,827 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-27 21:50:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-27 21:50:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,829 INFO L225 Difference]: With dead ends: 76 [2020-08-27 21:50:52,830 INFO L226 Difference]: Without dead ends: 74 [2020-08-27 21:50:52,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-27 21:50:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-27 21:50:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-27 21:50:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-27 21:50:52,841 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-27 21:50:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,842 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-27 21:50:52,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-27 21:50:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-27 21:50:52,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:50:52,844 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-27 21:50:52,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475795835] [2020-08-27 21:50:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475795835] [2020-08-27 21:50:52,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658608497] [2020-08-27 21:50:52,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,891 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-27 21:50:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,916 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-27 21:50:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-27 21:50:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:52,918 INFO L225 Difference]: With dead ends: 124 [2020-08-27 21:50:52,918 INFO L226 Difference]: Without dead ends: 76 [2020-08-27 21:50:52,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-27 21:50:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-27 21:50:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-27 21:50:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-27 21:50:52,932 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-27 21:50:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:52,932 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-27 21:50:52,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-27 21:50:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-27 21:50:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:52,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:52,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:50:52,934 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-27 21:50:52,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:52,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664839724] [2020-08-27 21:50:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:52,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664839724] [2020-08-27 21:50:52,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:52,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:52,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410806137] [2020-08-27 21:50:52,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:52,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:52,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:52,970 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-27 21:50:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:52,998 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-27 21:50:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:52,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-27 21:50:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,001 INFO L225 Difference]: With dead ends: 111 [2020-08-27 21:50:53,001 INFO L226 Difference]: Without dead ends: 78 [2020-08-27 21:50:53,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-27 21:50:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-27 21:50:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-27 21:50:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-27 21:50:53,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-27 21:50:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,013 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-27 21:50:53,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-27 21:50:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-27 21:50:53,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:50:53,015 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-27 21:50:53,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024656638] [2020-08-27 21:50:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024656638] [2020-08-27 21:50:53,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049591121] [2020-08-27 21:50:53,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,067 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-27 21:50:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,089 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-27 21:50:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-27 21:50:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,092 INFO L225 Difference]: With dead ends: 132 [2020-08-27 21:50:53,092 INFO L226 Difference]: Without dead ends: 130 [2020-08-27 21:50:53,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-27 21:50:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-27 21:50:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-27 21:50:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-27 21:50:53,105 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-27 21:50:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,106 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-27 21:50:53,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-27 21:50:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-27 21:50:53,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:50:53,108 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-27 21:50:53,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998449378] [2020-08-27 21:50:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998449378] [2020-08-27 21:50:53,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841900466] [2020-08-27 21:50:53,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,142 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-27 21:50:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,164 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-27 21:50:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-27 21:50:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,166 INFO L225 Difference]: With dead ends: 232 [2020-08-27 21:50:53,167 INFO L226 Difference]: Without dead ends: 138 [2020-08-27 21:50:53,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-27 21:50:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-27 21:50:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-27 21:50:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-27 21:50:53,184 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-27 21:50:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,184 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-27 21:50:53,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-27 21:50:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:50:53,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:50:53,187 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-27 21:50:53,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658765251] [2020-08-27 21:50:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658765251] [2020-08-27 21:50:53,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144961922] [2020-08-27 21:50:53,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,230 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-27 21:50:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,257 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-27 21:50:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-27 21:50:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,271 INFO L225 Difference]: With dead ends: 204 [2020-08-27 21:50:53,271 INFO L226 Difference]: Without dead ends: 142 [2020-08-27 21:50:53,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-27 21:50:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-27 21:50:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-27 21:50:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-27 21:50:53,284 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-27 21:50:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,284 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-27 21:50:53,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-27 21:50:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:50:53,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:50:53,287 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-27 21:50:53,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814149138] [2020-08-27 21:50:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814149138] [2020-08-27 21:50:53,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420996336] [2020-08-27 21:50:53,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,320 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-27 21:50:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,342 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-27 21:50:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-27 21:50:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,345 INFO L225 Difference]: With dead ends: 236 [2020-08-27 21:50:53,345 INFO L226 Difference]: Without dead ends: 234 [2020-08-27 21:50:53,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-27 21:50:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-27 21:50:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-27 21:50:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-27 21:50:53,360 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-27 21:50:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,361 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-27 21:50:53,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-27 21:50:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-27 21:50:53,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:50:53,364 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-27 21:50:53,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438544374] [2020-08-27 21:50:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438544374] [2020-08-27 21:50:53,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121221015] [2020-08-27 21:50:53,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,395 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-27 21:50:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,420 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-27 21:50:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-27 21:50:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,422 INFO L225 Difference]: With dead ends: 444 [2020-08-27 21:50:53,423 INFO L226 Difference]: Without dead ends: 258 [2020-08-27 21:50:53,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-27 21:50:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-27 21:50:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-27 21:50:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-27 21:50:53,441 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-27 21:50:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,442 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-27 21:50:53,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-27 21:50:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:50:53,445 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-27 21:50:53,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398279219] [2020-08-27 21:50:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398279219] [2020-08-27 21:50:53,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530126121] [2020-08-27 21:50:53,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,486 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-27 21:50:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,509 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-27 21:50:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,511 INFO L225 Difference]: With dead ends: 384 [2020-08-27 21:50:53,511 INFO L226 Difference]: Without dead ends: 266 [2020-08-27 21:50:53,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-27 21:50:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-27 21:50:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-27 21:50:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-27 21:50:53,526 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-27 21:50:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,526 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-27 21:50:53,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-27 21:50:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:53,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:50:53,529 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-27 21:50:53,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696450933] [2020-08-27 21:50:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696450933] [2020-08-27 21:50:53,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213088894] [2020-08-27 21:50:53,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,562 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-27 21:50:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,592 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-27 21:50:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,595 INFO L225 Difference]: With dead ends: 426 [2020-08-27 21:50:53,596 INFO L226 Difference]: Without dead ends: 424 [2020-08-27 21:50:53,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-27 21:50:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-27 21:50:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-27 21:50:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-27 21:50:53,610 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-27 21:50:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,611 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-27 21:50:53,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-27 21:50:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:50:53,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:50:53,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:50:53,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:50:53,613 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:50:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:50:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-27 21:50:53,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:50:53,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340040706] [2020-08-27 21:50:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:50:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:50:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:50:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:50:53,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340040706] [2020-08-27 21:50:53,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:50:53,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:50:53,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837566477] [2020-08-27 21:50:53,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:50:53,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:50:53,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:50:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,645 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-27 21:50:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:50:53,671 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-27 21:50:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:50:53,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-27 21:50:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:50:53,672 INFO L225 Difference]: With dead ends: 856 [2020-08-27 21:50:53,672 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:50:53,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:50:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:50:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:50:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:50:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:50:53,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-27 21:50:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:50:53,678 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:50:53,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:50:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:50:53,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:50:53,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:50:53,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:50:53,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:50:53,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:50:53,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:50:53,707 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:50:53,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:50:53,708 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:50:53,708 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-27 21:50:53,708 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-27 21:50:53,708 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-27 21:50:53,708 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,708 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,709 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-27 21:50:53,710 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-27 21:50:53,710 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,710 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-27 21:50:53,710 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-27 21:50:53,710 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-27 21:50:53,710 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-27 21:50:53,711 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,711 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-27 21:50:53,711 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-27 21:50:53,711 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-27 21:50:53,711 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-27 21:50:53,711 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-27 21:50:53,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:50:53 BoogieIcfgContainer [2020-08-27 21:50:53,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:50:53,729 INFO L168 Benchmark]: Toolchain (without parser) took 2522.23 ms. Allocated memory was 137.4 MB in the beginning and 229.6 MB in the end (delta: 92.3 MB). Free memory was 100.9 MB in the beginning and 142.6 MB in the end (delta: -41.8 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,730 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.44 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,732 INFO L168 Benchmark]: Boogie Preprocessor took 115.54 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 179.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,732 INFO L168 Benchmark]: RCFGBuilder took 387.32 ms. Allocated memory is still 200.3 MB. Free memory was 179.2 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,733 INFO L168 Benchmark]: TraceAbstraction took 1701.54 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 142.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:50:53,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.44 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 90.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.54 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 90.7 MB in the beginning and 179.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.32 ms. Allocated memory is still 200.3 MB. Free memory was 179.2 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1701.54 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 142.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, 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, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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...